Direct Boxes

Rupert Neve Designs is expanding their 500 Series lineup with the 511 microphone preamp. The 511 combines the pristine sound of their acclaimed 5017 preamp, the sweepable highpass filter from their 5012, and the tone-packed Silk/Texture circuit from their Portico II. We're sure the 511 is going to be a workhorse preamp that would suit any studio.

The Radial Trim-Two is a passive direct box, designed for use with laptop computers and other consumer devices where the user has a requirement for a 'ready access' volume control for quick adjustments on stage.The design begins with a choice of inputs including dual ?" jacks, left and right RCAs and a stereo 3.5mm input. These are wired in parallel to allow the signal to be split off to feed an alternate signal path such as monitors. Inside, two great sounding Eclipse transformers do the work of isolating and balancing the signal. These 'passive engines' deliver a linear frequency response from 20Hz to 18kHz and are capable of handling up to +15dB signal levels thus providing typical -10dB consumer-level devices with plenty of headroom. An easy access front panel stereo level control makes adjusting the volume a snap. A handy stereo-to-mono switch makes it easy to reduce the output channel count or send the same balanced signal to two destinations at once. Transformers provide galvanic isolation between the source and the destination and are extremely effective at eliminating hum and buzz caused by ground loops. This is augmented with a ground lift switch at the XLR outputs. One merely connects the source to the Trim-Two and then the male XLR outputs to the PA system. As the Trim-Two is completely passive, no power is required.Made in Canada from heavy duty 14 gauge steel, the Trim-Two features Radial's unique book-end design that creates protective zones around the connectors and controls. Inside, the unique I-beam frame protects the sensitive inner workings from potential damage that could torque the PC board and cause solder pointes to prematurely go cold. The steel casing also provides shielding against external magnetic fields.These features make the Trim-Two a great choice for keyboard players, DJs, audio-visual presenters and others that employ a laptop or tablet with a handy volume contro

The RNDI’s signature sound is the product of new custom Rupert Neve-designed transformers and class-A biased, discrete FET amplifiers. The carefully orchestrated union of these two elements is key to the RNDI’s unique response, delivering a powerful and vibrant direct sound capable of reproducing the full harmonic depth of basses, guitars, acoustic instruments, and professional line level sources. With portable, powerful, larger-than-life tone for your instrument and amplifier signals, the RNDI is truly the first standalone DI worthy of the Rupert Neve name. The Development After coming into existence during an experimentation with new transformer designs, the RNDI was fine-tuned over a series of listening tests against the the most popular high-end DIs available. It was in these tests where the RNDI always seemed to add another dimension to the sound and bring the instruments to life. The lows felt richer, deeper and fuller, and the highs had outstanding clarity without any added harshness. Most importantly, the design team noted: “As musicians, the RNDI consistently stood out as the DI we wanted to play through.” The Elements of Direct Tone The RNDI’s signature sound is the product both of new custom Rupert Neve-designed transformers and class-A biased, discrete FET amplifiers. The carefully orchestrated union of these two elements is key to the RNDI’s unique response. The transformers provide superior passive isolation while adding musical harmonics and dimension to the sound. The low impedance, transformer balanced output excels at driving long cable runs, and performance is immensely consistent regardless of the connected equipment. This is very important for both live and studio environments where the unamplified signal may travel almost 100ft before hitting an amplifier. In other designs, these high capacitance lines cause major reductions in high frequencies, however the output stage of the RNDI unrivaled at handling long runs with minimal losses. The class-A and discrete FET amplifier in the RNDI is powered by industry-standard 48V phantom power on the XLR connection, and creates a very high impedance input of 2M Ohms that ensures consistent performance with a wide variety of instruments. The significance of the RNDI’s class-A design is that there is no crossover distortion added to the signal, which can add upper order odd harmonics to the sound that are musically dissonant in nature. With the RNDI, the overwhelming majority of harmonic content is 2nd order (octave) with some 3rd order present (fifth above octave). These musically relevant harmonics – present in subtle amounts – actually add to the richness of the original signal. The discrete aspect of the RNDI design means there are no ICs or digital components that can have negative effects on the tone. These efforts to harmonize the performance of the transformer and the FET amplifier have resulted in the RNDI’s extremely well balanced response. The low end tonality is thick and powerful, with frequency response several octaves below audibility. The high end is clear, present, and smooth, with a frequency response extending beyond 100kHz. The phase coherence is unrivaled at all frequencies, which keeps the sound as natural as possible – especially vital when blending the direct signal with a microphone capture of the same source. Simply put, there is no DI ever made that performs like the RNDI. Game-Changing Headroom In instrument mode, the RNDI’s high input headroom of +21.5dBU is capable of handling not only instruments, but professional, line level sources like interfaces, CD players and drum machines without a pad. This allows the RNDI to serve as a way to “Re-Preamp” any previously recorded track using your interface and a desired pre-amp. To do this, simply connect a channel output of the interface to the input of the RNDI and connect the RNDI’s output to the preamp and engage 48V. By “Re-Preamping” you can apply the tone of another preamp to the source and more accurately automate or control the drive level on the preamp. In speaker mode, the RNDI can handle the screaming output of a 1000-watt power amplifier (92 Vrms or 266Vp-p) to capture the full tone of the instrument, preamplifier, EQ, inserts, and the amplifier’s output stages before it hits the speakers. This technique allows the engineer to avoid any bleed in a live environment and any unwanted tone added by the speaker cabinet or microphone. When used with modern speaker emulation plug-ins, this technique allows the engineer to take advantage of both the flexibility of digital modeling and the superior non-linear response of an actual analogue amplifier. Speaker and Instrument Mode User Notes In a speaker feed configuration, the DI is used post-power amplifier to capture the tone of the preamp and power amp. Be sure to switch the RNDI input level to speaker and connect the amplifier and speaker BEFORE turning the amplifier on. Note: with tube power amps, THE SPEAKER MUST BE CONNECTED to the THRU connection to provide a load for the amplifier. Please read your amplifier’s manual to discern its range of acceptable loads. Solid state amps can generally be run without a speaker connected, although you should always consult your amplifier’s manual to be sure. The RNDI can handle the full amplified output of a 1000W amp, so you can confidently drive the output stages of any amp less than 1000W to get your desired tone. In an instrument configuration, the DI converts the impedance of the instrument signal, balances the signal (if unbalanced), provides a buffered output stage to send to a separate mic preamp, and optionally sends the THRU connection to the amp input. To get the best performance out of your RNDI, we recommend you use the best available cables and mic preamps, and output the maximum level from your instrument. The instrument connects to the IN jack, and if you want to feed an amplifier, connect the THRU output to your amplifier’s input. The output of the RNDI in both instrument and speaker mode feeds a separate preamp for final gain. See the diagrams below for standard connection examples.

An expanded two-channel version of our best-selling RNDI, providing massive tone & headroom for all of your instruments & stereo sources. The RNDI-S’ signature sound is the product of custom Rupert Neve Designs transformers and class-A biased, discrete FET amplifiers. The carefully orchestrated union of these two elements is key to the unique response of the RNDI-S, delivering a powerful and vibrant direct sound capable of reproducing the full harmonic depth of basses, guitars, keyboards, acoustic instruments, professional line-level sources and consumer devices with a 3.5mm jack. With portable, powerful, larger-than-life tone, the RNDI-S is ready to make your stereo or mono direct sources shine. Technical Specifications: Custom Rupert Neve Designs transformers for rich, powerful tone Exceptional performance with any instrument Unrivaled clarity from discrete FET amplifiers Drives long lines with minimal loss Rugged steel frame built for life on the road Powered by dual 48V phantom power Excellent phase coherence at all frequencies

Whether you play guitar, bass, keyboards or another stringed instrument, you'll need a direct box that won't diminish your instrument's tone, like the Direct Box Active and Direct Box Passive from Warm Audio.  Built around world-famous CineMag USA Transformer topology and engineering, like no other DI Boxes in the world. Constructed with top-tier discrete components housed in rugged aluminum chassis' that include switches, knobs and connectors that are all designed to withstand heavy abuse on the road or in the studio. Made With USA Custom CineMag Transformers Every aspect of our direct boxes are designed for maximum sonic integrity, from the custom-wound CineMag USA transformer to the rugged metal knob and switches.  You can expect warm, rich tone even after long cable runs, and the extruded aluminum enclosure ensures a long life span.  When you need to convert an instrument-level signal to mic-level, with sonic quality as your top priority, you'll be well-served with the Direct Box Active and Direct Box Passive from Warm Audio. New DI Box Experience Warm Audio DI boxes offer the rare versatility of having an onboard variable pad knob which attenuates your input signal all the way from -3dB to -30dB, which will easily tame any instrument input source. Both of our Direct Boxes offer a Thru-put jack that is jumpered to the input jack. It is a convenience jack allowing you to send your instrument's signal to a second place in addition to the live mixer or recording device. Our Direct Boxes can also take a recorded signal at line level and send it to another line input while simultaneously sending signal out of the XLR mic level output of the Direct Box. Typical Applications For A DI Box Connecting electronic instruments such as guitar, bass, keyboard, or drum machines directly to a PA or recording system. Simply put, a DI box converts the high impedance, unbalanced output signals to low impedance, balanced output signals. By doing so, the instrument signals are now converted to the proper voltage level for the PA or recording system - which greatly reduces and/or eliminates connections which could cause tonal shifts and distortion. Passive Or Active? Direct Box Active is best for instruments with passive pickups, especially acoustic instruments.  The Direct Box Active can also operate in "passive" mode. Direct Box Passive is best for balancing the signal of instruments with active electronics, but still performs extremely well on passive pickups by producing a frequency range that exceeds the bandwidth of most passive DI boxes on the market. Passive Specifications CUSTOM-WOUND CINEMAG USA OUTPUT TRANSFORMER CONVERTS INSTRUMENTS TO MIC-LEVEL SIGNALS WITHOUT SIGNAL DEGRADATION IDEAL SOLUTION FOR PLUGGING YOUR INSTRUMENT DIRECT INTO ANY MIC PRE TOP-QUALITY CLASS A COMPONENTS WITH GOLD-PLATED TRACES ON CIRCUIT BOARD RUGGED ALUMINUM CONSTRUCTION PAD: VARIABLE FROM -3DB TO -30DB BALANCED OUTPUTS: 600 OHMS, MIC LEVEL INPUT IMPEDANCE: 1 MEG OHMS  THD: .01% FROM 20HZ TO 50HZ. LESS THAN .003% FROM 50HZ TO 20KHZ FREQUENCY RESPONSE: 10HZ TO 90KHZ +/- 0.5DB

Whether you play guitar, bass, keyboards or another stringed instrument, you'll need a direct box that won't diminish your instrument's tone, like the Direct Box Active and Direct Box Passive from Warm Audio.  Built around world-famous CineMag USA Transformer topology and engineering, like no other DI Boxes in the world. Constructed with top-tier discrete components housed in rugged aluminum chassis' that include switches, knobs and connectors that are all designed to withstand heavy abuse on the road or in the studio. Made With USA Custom CineMag Transformers Every aspect of our direct boxes are designed for maximum sonic integrity, from the custom-wound CineMag USA transformer to the rugged metal knob and switches.  You can expect warm, rich tone even after long cable runs, and the extruded aluminum enclosure ensures a long life span.  When you need to convert an instrument-level signal to mic-level, with sonic quality as your top priority, you'll be well-served with the Direct Box Active and Direct Box Passive from Warm Audio. New DI Box Experience Warm Audio DI boxes offer the rare versatility of having an onboard variable pad knob which attenuates your input signal all the way from -3dB to -30dB, which will easily tame any instrument input source. Both of our Direct Boxes offer a Thru-put jack that is jumpered to the input jack. It is a convenience jack allowing you to send your instrument's signal to a second place in addition to the live mixer or recording device. Our Direct Boxes can also take a recorded signal at line level and send it to another line input while simultaneously sending signal out of the XLR mic level output of the Direct Box. Typical Applications For A DI Box Connecting electronic instruments such as guitar, bass, keyboard, or drum machines directly to a PA or recording system. Simply put, a DI box converts the high impedance, unbalanced output signals to low impedance, balanced output signals. By doing so, the instrument signals are now converted to the proper voltage level for the PA or recording system - which greatly reduces and/or eliminates connections which could cause tonal shifts and distortion. Passive Or Active? Direct Box Active is best for instruments with passive pickups, especially acoustic instruments.  The Direct Box Active can also operate in "passive" mode. Direct Box Passive is best for balancing the signal of instruments with active electronics, but still performs extremely well on passive pickups by producing a frequency range that exceeds the bandwidth of most passive DI boxes on the market. Active Specifications POWER (ACTIVE ONLY): 48V PHANTOM OR TWO 9V BATTERIES.  CAN ALSO BE USED PASSIVELY CUSTOM-WOUND CINEMAG USA OUTPUT TRANSFORMER CONVERTS INSTRUMENTS TO MIC-LEVEL SIGNALS WITHOUT SIGNAL DEGRADATION IDEAL SOLUTION FOR PLUGGING YOUR INSTRUMENT DIRECT INTO ANY MIC PRE TOP-QUALITY CLASS A COMPONENTS WITH GOLD-PLATED TRACES ON CIRCUIT BOARD RUGGED ALUMINUM CONSTRUCTION PAD: VARIABLE FROM -3 TO -30DB  BALANCED OUTPUT: 600 OHMS, MIC LEVEL INPUT IMPEDANCE: 1 MEG OHMS OUTPUT CONTROL THD: .01% FROM 20HZ TO 100HZ. LESS THAN .004% FROM 100HZ TO 20KHZ FREQUENCY RESPONSE: 20HZ TO 70KHZ +/- 0.5DB

Borrowing the same award-winning microphone preamplifiers found on their 744T digital portable interface, the Sound Devices USBPre 2 provides one of the highest quality portable interfaces available for both Mac and Windows computers. The USBPre 2 is equipped with a pair of fully discrete, transistor-based XLR inputs and impressively lucid 24-bit converters that are capable of up to 192kHz sample rates.Additional inputs for line-level sources and consumer audio electronics, as well as S/PDIF optical Toslink digital devices are also available. A 23-segment, multicolor LED meter provides you with the essential feedback you need to keep an eye on your levels, and are an invaluable asset when using the USBPre 2 as a standalone preamp and A-to-D converter.The MM-1 is at home in high-definition television production, corporate/industrial environments, radio/television announce booths, and music production.Its headphone monitor is an advantage in applications where communications channels or mix-minus feeds need to be monitored in headphones. The user can monitor both microphone audio and external audio sources in headphones with level control. The MM-1 is designed to be durable. Its aluminum chassis, oversized end panels, machined knobs, and panel mounted connectors assure reliable mechanical operation.Sound Devices’ MM-1 is a single-channel, portable microphone preamplifier with a powerful headphone monitoring function. Proven in mission-critical applications, the high-performance microphone preamplifier uses a transformer-balanced input and output with a bipolar ±15 volt power supply to produce low-noise, low-distortion gain at all switch positions. It features an “unclippable” dual-stage limiter and two-position high-pass filter. Flexible microphone powering provides phantom power at 48 volts or 12 volts and 12-volt T-power. It is powered from two-AA batteries or external 5-17 VDC, such as via the PIX-E PSU.Features:Maximum of 66 dB of gain, in eleven discrete stepsDynamic range exceeding 120 dB10 Hz to 50 kHz audio bandwidthHigh immunity to RF interferenceHigh current line output driverTransformer-balanced input and outputExtended range peak limiter via dual opto-isolators makes preamplifier virtually “unclippable”Selectable 48-volt / 12-volt phantom power or 12-volt “T” powerHigh-pass filter @ 80 or 160 Hz, 6 dB per octaveHeadphone monitoring of microphone audio, monitor audio, or a mix of bothMonitor input accepts mono, balanced or unbalanced line-level inputs on 1/4-inch tip-ring-sleeve connectorSeparate level control of Monitor gain and overall headphone gainSplit ear function via DIP switchesInternal battery power (two-AA)Excellent battery life with alkaline and NiMH rechargeable batteriesExternal 5-17 VDC poweringHigh-strength aluminum chassis with durable belt clip   

The Transceiver is a four channel insert station. The main function is to convert +4dB balanced signals to unbalanced and back again. Each channel has a send level, the return has a gain control and a polarity switch. Among other things you can use The Transceiver to do the following:It's an insert station. Insert unbalanced gear such as guitar pedals and old echo fx into your DAW or consol.It's an active DI-box with up to 20dB gain. Plug your favourite instrument into your collection of vintage gear via The Transceiver.It's a re-amping tool.It's a Swiss Army Knife on stage. Hook up balanced gear on stage between your instrument and amp. 

ZBox matches the output impedance (”Z”) of your guitar to the impedance of a non-amp input, such as the mic/instrument preamp inputs on your audio interface. Without proper impedance matching, your guitar won’t sound natural or “feel right”. If you use Digital Performer's Custom 59 amp model plug-in, or a third-party guitar plug-in product like IK Multimedia Amplitube, Waves GTR, Native Instruments Guitar Rig, or similar guitar modeling software, use ZBox to further enhance the authenticity of the tones you play from these products.ZBox’s unique advantage? Authentic matching circuits that emulate the two-jack switching network found on many classic amplifiers, complete with analog simulation of the input tube grid. Only ZBox delivers the most authentic amplifier impedance matching available for the absolute truest sound and “feel” from your guitar. ZBox is the “missing link” for digital guitar processing, providing the hardware-driven input characteristics required to truly emulate a real guitar amp.

Direct boxes are an essential tool for any stage or studio. They make it easy to get clean, low-noise audio to a mixer no matter what instrument you are using. Available in four versatile models, our ultra-affordable DI's offer the Mackie sound quality that you expect with Built-Like-A-Tank™ construction for maximum reliability. From acoustic guitars to laptops, be ready for anything with MDB Series direct boxes.Features:Perfect for guitars, basses, and more for stage and studioHigh-impedance 1/4-inch input with Thru outputBalanced male XLR output connector with Ground LiftUltra-low noise and distortion-15dB pad ensures distortion-free performance when connecting to high-output sourcesBuilt-Like-A-Tank™ construction

The DTI (Dual Transformer/Isolater) is a high quality totally passive audio interface that uses a pair of high performance transformers to totally separate input and output signal grounds, thereby isolating two systems and reducing hum and ground-loop noise. The DTI's audio transformers have an extremely flat and wide frequency response and can handle high signal levels while maintaining an isolated balanced output. This gives the DTI a very clean and neutral sound with a wide variety of signal sources. The transformers are wound for 1:1 unity gain and are designed to be used with impedances from 600 ohms to 100k ohms.What further sets the DTI apart from other lesser isolation boxes is its connection versatility. We have provided XLR, 1/4" phone, and RCA type phono connections on all inputs and outputs. This allows it to easily fit into virtually any audio system and be the clean patch point between all types of systems.Whether you need an interface between a computer based audio workstation and your monitor system, isolation on long cable runs in a fixed installation, isolation of a signal source from your recording equipment, or in many cases, just a safer connection between two audio systems, the DTI can accommodate.The compact black anodized all aluminum case and it's passive design allow the DTI to provide years of trouble free service in Live Sound, Permanent/Fixed Install, D.J., and virtually any PA application. It's full feature set, rugged construction, and high-end specifications make the DTI the obvious choice.Features:Isolates Components in Sound Systems to Eliminate Ground IssuesHigh Quality TransformersXLR, ¼-inch and RCA Inputs and OutputsRugged Anodized Aluminum CasePassive DesignSpecifications:Frequency Response: 10Hz-50kHz +/-.5dB@+4dBuTotal Harmonic Distortion: .01% Typical @ 1kHz, +18dBu,

The Phantom II Pro is designed to do one thing and do it well. It provides clean, reliable phantom power for one or two condenser microphones in a rugged, compact, and portable unit. Innovative low power circuitry generates the higher voltage necessary for powering microphones while maximizing battery life. The Phantom II Pro installs inline between your microphone and a balanced line input on your gear. Balanced lines offer increased immunity to external electrical noise, such as hum. Since a balanced system minimizes induced noise, it is the preferred method of connecting audio gear, especially when long lengths of cable are used.The Phantom II Pro is an invaluable tool in application areas including (but not limited to): home or professional recording studios, live sound, PA, permanent installs, DJ, AV, podcasting and broadcasting. Use it with mixers, audio processors, digital audio workstations or anywhere you need phantom power for your mics.Features:XLR connectors for balanced inputs and outputsLow power, high efficiency CMOS circuitry for Long battery life using a standard 9 Volt battery (Alkaline recommended)Can be powered with an external power supplyfor operation from AC mainsRugged extruded aluminum case with accessible battery compartmentLED lighted On/Off switchLow noise, low distortion circuitrySpecifications:Input Connections: Female XLR (2)Output Connections: Male XLR (2)Phantom Power: 48 Volts DC typicalCurrent Limiting Resistors: 6.98k Ω (1%)Current Drain: 10 mA - no load / 45 mA - typical (full load - 2 microphones)Power: 9V battery (IEC 6LR61, ANSI-1604A type Alkaline recommended) or external supply 7.5-12 V AC/DC, Any Polarity, 10 hours with Alkaline battery - typical (full load)Dimensions: 1.85"H x 4.6"W x 3.9"D (47mm x117mm x 99mm)Weight: 0.82 lbs (0.37 kg)

The Dual RDB is the ideal interface solution for any application where stereo or dual line level signals from recording interfaces, computers, mixers, iPods, consumer audio or video machines need to be connected to XLR microphone or ¼-inch instrument level inputs.The unit has two high quality isolation transformers that prevent ground loops when connecting various systems together.The Dual RDB accepts 1/4" TRS and XLR line level inputs and outputs mic or instrument levels. The Dual RDB's variable level controls allow volume control to be set at the source rather than in the studio, AV room, audio closet or installation rack. A 20Hz to 20kHz frequency response ensures the Dual RDB will function transparently with any high quality audio source.Applications:Re-amping interface for multiple ampsStereo/Dual direct boxVariable Input pad for mic or instrument inputsStereo Audio/Video interface to low level inputSpecifications:Frequency Response: 20 Hz - 20 kHz, ± 0.5 dB @ +4 dBuTotal Harmonic Distortion: .01% @ 1kHz, +18 dBu 80 dB (typical)Input Connections: 1/4" TRS balanced,XLR balanced femaleThru Connections: 1/4" TRS balanced,XLR balanced femaleInsertion Loss: -20dB @100k Ω load,-25dB @600 Ω loadDimensions: 1.85"H x 4.6"W x 3.9"D (47mm x 117mm x 99mm)Weight: 0.88 lbs (0.40 kg)

Παθητικό Stereo DI box με εισόδους Jack, Jack thru και XLR out.Χαρακτηριστικά:Διακόπτης -15dB padLow CutGround/LiftΤέσσερις line εισόδους (input + thru), 2 XLR έξοδοιΑντιστροφή Φάσης

From acoustic guitars to laptops, always sound your best with MDB Series Direct Boxes. Available in four different models, the MDB Series will give you the peace of mind that your sound will faithfully get to your audience the way that you hear it on stage. Direct boxes are an essential tool for any stage or studio.They make it easy to get clean, low-noise audio to a mixer no matter what instrument you are using. Available in four versatile models, our ultra-affordable DI's offer the Mackie sound quality that you expect with Built-Like-A-Tank™ construction for maximum reliability. From acoustic guitars to laptops, be ready for anything with MDB Series direct boxes.Specifications:Connect an instrument such as a guitar, bass, or keyboard to a microphone preampConverts a high-impedance, unbalanced 1/4" input to a low-impedance, balanced XLR mic-level output1/4" thru jack for routing to an amplifier-20 dB pad prevents overloading when accepting signal from a loud sourceGround-lift switch minimizes humActive design operates on phantom power 

From acoustic guitars to laptops, always sound your best with MDB Series Direct Boxes. Available in four different models, the MDB Series will give you the peace of mind that your sound will faithfully get to your audience the way that you hear it on stage. Direct boxes are an essential tool for any stage or studio.They make it easy to get clean, low-noise audio to a mixer no matter what instrument you are using. Available in four versatile models, our ultra-affordable DI's offer the Mackie sound quality that you expect with Built-Like-A-Tank™ construction for maximum reliability. From acoustic guitars to laptops, be ready for anything with MDB Series direct boxes.Specifications:Connect two mono instruments such as guitars or basses or a stereo instrument such as a keyboard to microphone preampsConverts high-impedance, unbalanced 1/4" TS inputs to low-impedance, balanced XLR mic-level outputs1/4" thru jacks for routing to amplifiers or pedalboardsPer-channel -15 dB pad prevents overloading when accepting signal from a loud sourceGround-lift switch minimizes humPassive design requires no batteries or power supply

The Radial Phazer™ is an analogue phase alignment tool that lets you bring two sound sources together so that the fundamentals play in sync. Once in phase, the results are impressive: On electric guitar; you can combine the direct feed of an amp with a room mic to create fat rich tones. On a kick drum, combine the 'attack' sound from a batter head mic with the 'boom' captured by the outer shell mic. On a snare drum, combine the top and bottom mics and on acoustic instruments, combine a close 'spot' mic with a room mic to capture textures like never before.The Phazer is designed from the ground up for optimum sound quality. It employs full-size 100% discreet class-A electronics to deliver the warmth and thickness that is simply not possible with chip based devices. This results in smooth, natural sounding phase curves which are particularly noticeable in the lower frequency spectrum. 0º to 180º phase adjustment is performed with a single knob making it easy to zone-in on the sweet spot. For the more adventurous, a 180° polarity reverse switch accesses the 181° to 360° range and lets you create weird to absurd 'Phazed' tonal textures. This is augmented with a variable low-pass filter that lets you focus the effect in the lower frequency spectrum - where phasing is most audible.Built Radial tough for the road, the Phazer is equipped with an innovative book-end design that creates a protective zone around the knobs and switches. Construction is 14-gauge steel with an internal I-beam frame that protects the sensitive electronics in even the harshest touring environments. A full bottom no-slip pad provides electrical insulation to eliminate electrical bonding and mechanical isolation to reduce mishap.The Radial Phazer is a creative tool for the studio designed to expand your tonal palette. Live, it delivers great sound fast. Once you try one, you will never mix without!Features:Time align two signals for exceptional clarity100% analogue, does not 'step' like digital delayLow-pass filter lets you focus the effectOnce you try it, you will never mix without

The Radial J33 is a combination phono preamplifier and purpose built stereo direct box made to handle the rigors of the professional recording studio and the abusive environment of live touring. But don't let the tough exterior fool you… the J33's sonic performance will easily surpass many audiophile preamps costing much more. The Radial J33, a high performance turntable preamp that is ideally suited for music playback, archiving, DJing and sampling.Designed specifically for dynamic cartridges, the J33 begins with a low noise front end. Inputs are standard RCA with the required turntable ground lug. A precise RIAA low pass filter is tailored to produce a smooth, warm response. The signal is then buffered to provide the audio system with a standard -10dB signal with choice of RCA connectors for compatibility with home HiFi entertainment systems, 3.5mm (1/8") output to feed a laptop or iPod, or a stereo TRS ¼" jack for an audio recorder. A second set of direct box XLR outputs deliver a mic level signal to feed a concert snake, mic splitter and mixing desk preamp inputs. A rumble filter is also available for high sound pressure environments to reduce bothersome resonant feedback.As with all Radial DIs, the J33 features a 14 gauge steel enclosure with a unique book-end design that creates a protective zone around the switches and connectors. The internal I-Beam construction ensures maximum rigidity while ensuring minimal stress on the sensitive solder joints. These combine to provide exceptional shielding against noise while ensuring greater dependability in the most demanding environments.Features:Combination RIAA Phono preamp and DI boxStereo RCA, ¼" TRS, 3.5mm and XLR outputsBuilt -in low frequency rumble filterChoice of 48V phantom or DC supply

The Radial USB-Pro is a high-resolution stereo direct box designed to convert sound files from a laptop computer and seamlessly transfer them to a pair of balanced audio outputs to feed a PA, recording or broadcast mixing console.Made to be plug & play easy to use, the USB-Pro automatically configures itself for use with all popular operating systems including Mac OSX, Windows XP, Vista and Windows 7, thus eliminating the need to load special drivers. Unlike devices that are limited with 16 bit, 44.1kHz conversion rates, the USB-Pro elevates the performance with true 24 bit, 96kHz stereo converters to deliver more headroom and greater detail. This eliminates the need for additional sound cards or separate converters when transferring files, further streamlining production in busy work environments.Connection from the laptop is done via the 'pro-audio standard ' USB type-B port. Digital-to-analog conversion is monitored with the built-in headphone amplifier to ensure the signal is being properly downloaded and converted. A mono-sum switch may be engaged to check for phasing or facilitate signal distribution to two outputs should this be preferred. One simply sets the output volume control to suit. Should hum or buzz caused by ground loops be encountered, two 'set & forget' side-access switches let you insert isolation transformers into the signal path to block stray DC voltage offsets. To further reduce susceptibility to noise, this is augmented with a ground lift switch that lifts pin-1 on the two XLRs.As with all Radial products, the USB-Pro is designed to handle the rigors of professional touring. Our unique book-end design creates protective zones around the switches, connectors and controls to keep them out of harm's way. Inside, our time-tested I-beam construction assures the sensitive internal PC board will not torque which could otherwise cause premature part failure. Finally, a full bottom no-slip pad provides mechanical isolation and electrical insulation, further advantaging the user.Features:High performance 24bit/96k stereo direct boxAutomatically installs without the need of a driverBuilt-in headphone amplifier for monitoringBalanced Lo-Z outputs with switchable isolation

The Radial PZ-DI is a unique direct box that is specifically designed for acoustic and orchestral instruments. Unlike most direct boxes that are limited to a 'one size fits all' design, the PZ-DI lets you properly match the input impedance to the source to optimize the frequency response, dynamics and feel so that no matter what type of pickup you employ, you will enjoy smoother, more musically pleasing results.The design begins with a 3-position load adjustment switch: The 1 meg-ohm position delivers the classic impedance found on most active DI boxes. The 220k-ohm setting warms up the tone of a magnetic pickup to give you the feel and tone as if connected to a tube amplifier. The ultra-high 10 meg-ohm impedance is used to compensate for the harsh, squawky tone that usually plagues piezo-equipped instruments. This is followed by a fully variable high-pass filter that lets you 'size the instrument' by gently rolling off bass frequencies to eliminate unwanted resonance. You could for instance, retain the low frequencies on a cello or increase the cut-off point to better suit a violin. For active instruments such as acoustic guitars that incorporate a battery powered preamp, you can engage a low-pass filter to gently soften the hard edge for a smoother more natural tone.To maximize signal handling and reduce distortion, the PZ-DI incorporates an innovative DC to DC switching supply that converts the phantom power to deliver extra headroom. This provides ample dynamic range for acoustic instruments. Should an extra loud source such as an active bass or digital keyboard be encountered, simply activate the -15dB pad to satisfy the situation. Other problem solvers include a 180° polarity reverse switch to tame hot spots on stage that can cause feedback and a ground lift switch to help eliminate hum and buzz caused by ground loops.The Radial PZ-DI is a ground breaking direct box that can instantly adapt to all types of pickups so that you can enjoy the full frequency response and dynamics of an orchestral string instrument, smooth-out the peaks of bluegrass fiddle, banjo or mandolin, split off a bass guitar without excessive loading, or naturally amplify an acoustic guitar without the usual tone-altering effects.Features:Optimized for orchestral instruments on a live stageAdjustable load for piezo and magnetic pickupsVariable low-cut filter to control bass resonance48V phantom powered, does not require batteries

The Radial Pro48's innovative digital switching power supply significantly increases headroom and allows for less distortion while yielding a smooth, linear response extending from 20Hz to well above 100kHz resulting in natural, uncolored signal transfer. This superior performance makes the Pro48 an ideal candidate for use with today's battery-powered active basses and acoustic guitars that tend to overload other direct boxes.Jack in/thruXLR out- 15 dB padGround/lift48V phantom powerThe compact Pro48 is built road-ready with 14-gauge steel in a unique bookend design that provides protective zones around the switches and connectors. The internal welded I-beam construction assures outside stress will not torque the PC board thus assuring longer product life. The Pro48 is designed for high-use applications wherever an active direct box is called for. A 15dB pad switch is provided to tame hot signal and expands the range of instrument preamps and the ground lift switch helps eliminate hum and buzz problems caused by ground loops.Features:High-resolution active direct boxIncreased dynamic range and headroom48V phantom-powered with digital switchingCompact, rugged book-end designIdeal for active guitars and bassesApplications:Active acoustic guitarActive bass guitarActive electric guitar with preampKeyboard / SynthesizerDirect recording

The DI4000 gives you four first-class DI channels in one rack space. With two inputs (XLR and 1 /4 " TRS), a balanced output (XLR) and a 1 /4 " link output per channel, up to 40 dB of switchable input attenuation and up to 20 dB of gain, the DI4000 is equipped to deal with virtually any input signal, while our OT-1 output transformers ensure clean, powerful output.

The ULTRA-DI DI20 is a one-of-a-kind DI (direct injection) box that can convert up to two separate unbalanced 1/4" TRS lines into two balanced XLR outputs, or function as a signal splitter. Electric guitarists, keyboardists and bassists will love the flexibility this incredible box provides.By flipping a switch, you can use the DI20 as a launching pad for two separate mono signals, a stereo signal, or a split-signal feeding two separate amps. The DI20 also features a ground lift switch and the 3-position input attenuator can accommodate input levels of up to +48 dBu. This handy built-in attenuator allows you to connect to your amplifier’s speaker outputs, even amps rated as high as 3,000 Watts. You can power the DI20 with either a 9 V battery or your mixer’s phantom power supply (+18 to +48 V DC). The whole package is wrapped in an ultra compact, road-suitable and rugged metal housing.

The unit includes phantom power and battery supplies as standard. Should the phantom power from the console fail or be accidentally switched off, the AR-133 automatically switches over to the internal 9V battery providing uninterrupted use. The unit is housed in a rugged aluminium extrusion case, with robust polyurethane end-cheeks which give the AR-133 a very distinctive look. Input connectors are both 1/4" jack sockets and an XLR socket, the latter meaning that the AR-133 can be used to convert unbalanced signals to a balanced output on XLRs throughout.The arched case allows cables to run back underneath the unit from the end for neat cable management. Input attenuation is 0, -20 or -40dB, making the box suitable for instrument, line or amplifier levels on inputs. On the output side, a ground-lift switch is provided for quick solutions to ground-loop problems. The AR-133 uses an enhanced version of the same audio path as the AR-116, now regarded by many people as a reference standard. The sound quality is legendary, particularly on acoustic and bass guitars Numerous applications can be satisfied by the AR-133. For example, as well as the traditional guitar use, the AR-133 can be used with keyboards, DJ consoles, amplifier outputs, and other electronic sources. An additional bonus is the ability to use the AR-133 as an active balancing device.Specifications:Input Impedance: 1 MOhm (pad at 0dB), 47 kOhm (pad at -20dB or -40dB)Max Input: +9dBu (pad at 0dB), +29dBu (pad at -20dB), +49dBu (pad at -40dB)Input Connectors: Two Parallel 1/4" jack connectors (Tip Hot +ve, Sleeve ground), and a parallel XLR connector (unbalanced) (Pin 2 Hot +ve, Pin 1 & 3 ground)Output: Transformer BalancedMax Output: +8dBu into 600 Ohms or greaterOutput Connectors: XLR3-32 or equivalentTHD: < 0.005% at 1khz, 0dbu outputNoise: < -105db unweighted, 22hz-22khz, rms*Frequency Response: 30Hz to 20kHz, +0dB/-1dBMain/Standby battery: 9 volt PP3 type, preferably alkalinePower Consumption: on phantom: less than 7.5mA, on battery: less than 2mA.Phantom Power: +20 volts DC to +48 volts DCDimensions: 59 mm x 124 mm x 143 mm (2.3" x 4.9" x 5.6")

Η ιστορία του Blue Box είναι εδώ Παθητικό D.I. BOX με Ground Lift. Είσοδος: ¼’’ Phone Jack Unbalanced καιέξοδοι: XLR, Balanced, Microphone Level 

Active D.I. BOX with Phantom Power and battery. Input: 2Χ ¼’’ Phone Jack Unbalanced (1 output for instrument ) Output: XLR, Balanced. 

 UUltra compact Active Direct box, with normal High Impedance input as well as a separate speaker level input for connection to the back of instrument amplifiers.Heavy duty all-steel chassis, –20 dB Pad and Audio Ground Lift switches, plus Phantom or DC power options

A flexible, compact Active Direct box, with normal High Impedance input as well as a separate speaker level input for connection to an aux speaker output on the back of instrument amplifiers. Heavy duty all-steel chassis finished in attractive matt textured polyurethane, with hardwearing epoxy screen printing and slip resistant rubber pad. Features include –20 dB Pad and Audio Ground Lift switches, plus Phantom or 12V DC power options. Security features include Kensington®-type computer lock slot and optional bracket kit for under-table mounting. Specifications: Max Input Level +12 dB Phantom powered, +8 dB using 12 VDC Power Supply. Input Impedance 1 Meg Ohm Max Output Level (nominal) +12 dB 10K Ohm load using Phantom power +11 dB 600 Ohm load using 12 VDC Power Supply Output Impedance 680 Ohms Balanced Output Signal to Noise -100 dB unweighted, -104 dB A weighted Dynamic Range 112 dB 10K Ohm load using 12 VDC Power Supply Distortion @100 Hz 0.0025%, @1KHz 0.0026%, @10KHz 0.0033% Frequency Response 20Hz to 20KHz, ± 0.2 dB Gain through Unit 6dB (Normal input, Pad switch out) Power Requirements 48V Phantom power on XLR pins 2 and 3; 12-15V DC from external supply Pad Switch -20 dB attenuation Speaker Input -40 dB attenuation, equivalent to 100:1 decrease in input level., -60 dB attenuation available when Pad switch also enabled Input Connectors Insulated jacks Output Connector 3 pin XLR. Wired Pin 1 Ground, Pin 2 + Hot, Pin 3 - Cold. Audio Ground (Pin 1) lift switch fitted Construction All-steel powdercoated chassis, fibreglass PCB

 Dual channel Active direct box specially configured for AV applications  

Six Channel Active Direct Box, Splitter and Mic/Line Mixer

A true USB Plug and Play digital to analog pro audio interface with full transformer balanced outputs to provide full Galvanic isolation to eliminate earth loops / ground hum and other extraneous interaction noise and distortion 

Just like the USB DI, but with the very useful addition of an Output Volume Control for quick and easy level setting and changing 

In response to many requests from users of our original USB DI who have been using it for specific applications, ARX is excited to present the new ARX USB DI-HP - everything that the original USB DI was, with the addition of a headphone output with its own level control. It is still a true Plug and Play digital to analog pro audio interface, removing the need to use any existing sound card outputs, but now its output level can be monitored quietly and accurately.Naturally it still features full transformer balanced output isolation to eliminate earth loops / ground hum and other extraneous interaction noise and distortion.The addition of the headphone output and control allows easy personal monitoring of the audio signal passing through the USB DI-HP without the need for Monitor Loudspeakers 

ARX USB I/O is a true USB Plug and Play digital to analog/analog to digital pro audio interface. It features full transformer balanced Inputs and Outputs, providing the Galvanic isolation required to eliminate earth loops / ground hum and other extraneous interaction noise and distortion 

The U5 high-voltage DI-preamp combines a unique passive tone selector with a variable gain preamp and filter. The high input impedance accepts a wide variety of signal levels and instruments from acoustic guitars to high-output active bass guitars and keyboards. The U5 direct box is loaded with sonic character and user features professionals demand.        FEATURESPure Class A, 100% discrete design Smooth musical detail and sonic excellence Variable gain preamp to +30dB. Dual microphone and line outputs Hi-Z   3,000,000 ohm input impedance Very low noise -100dB High headroom +30dB Six tone bank selections. DC coupled Class A output for superior bass High cut switch eliminates noise LED active signal indicator Headphone monitor output jack Low distortion less than 0.5% THD and IMD High level 400 watt speaker input Active to thru selector - ground isolation switch 100% discrete power supplies for audio path Internal toroidal power supply for low noise Long lasting, stainless steel hardware 

DI box παθητικό.

Παθητικό DI για εξομάλυνση σήματος

Omnitronic LH-060 Dual PRO Passive DI box

The Radial J48 has been designed from the ground up to deliver the most natural tone. As a direct box manufacturer, we do not believe it is our task to alter the sound of your prized '1962 Fender Jazz Bass', but retain and transfer the true character of the instrument to the mixing console without adding distortion or introducing artifact. This design philosophy has gained a tremendous following from many of the world's most demanding musicians.Using only 48V phantom power, the Radial J48 is an active direct box that produces an exceptionally linear response that extends from 20Hz up to well above 40kHz. Low distortion of all types is achieved via a unique digital switching power supply that raises the internal operating rail voltage for added headroom and improved signal handling. The results are truly amazing. The J48 delivers an ideal even-order harmonic cascade and a sonic performance that outperforms DIs costing several hundreds more.And like all Radial products, the J48 is both feature-rich for studio and made tough to handle the road. This includes a -15dB input pad to tame extra loud signals, 180º polarity reverse for feedback control on stage and a ground lift to help reduce hum & buzz caused by ground loops. Special features include a merge function that elegantly mixes left-right signals to mono without phase cancellation. To minimize resonant feedback with acoustic instruments, the J48 is also equipped with an 80Hz high-pass filter (low-cut). When engaged, this also increases headroom by eliminating unneeded bass frequencies.Radial's innovative book-end design protects switches and connectors from abuse while the internal I-beam construction eliminates stress on the PC board. This serves to reduce solder joints from going 'cold' and delivers trouble-free performance for years. A full-bottom no-slip pad provides mechanical and electrical isolation while providing plenty of 'stay-put' for rockin' stages!The Radial J48 is used by artists as diverse as acoustic guitarist Tommy Emmanuel; super-star engineer Joe Chiccarelli; and one of the most successful bands of all time Fleetwood Mac. The Radial J48… the world's finest 48V phantom powered active direct box.Features:Ultra low distortion of all typesExceptional headroom & dynamic rangeRetains instrument's natural soundPowered by 48V phantom

The Radial JDI is a passive direct box designed to handle extreme signal levels without distortion of any kind. Unlike an active DI that is limited by the buffering amplifier’s rail voltage, the JDI employs a Jensen audio transformer as the engine. Jensen transformers are legendary in their ability to gracefully handle transients while delivering a smooth, warm sounding Bessel curve, reminiscent of the finest vintage gear. Ruler flat from 10Hz to 40kHz and with virtually zero phase deviation, the JDI delivers the natural, pure sound of the instrument without artifact.The 100% passive circuitry inside the JDI is incredibly efficient. The transformer performs both high-to-low impedance conversion and signal balancing at the same time with minimal loading and does so without any power whatsoever. The transformer also introduces a magnetic bridge that passes signal while rejecting stray DC voltage. This makes the JDI particularly adept at eliminating hum and buzz caused by ground loops.Features include input and throughput ¼” connectors, -15dB input pad, ground lift, and 180º degree polarity reverse to help phase align the instrument with the PA. A secondary circuit is added for direct interfacing with high output devices such as guitar or bass amp loudspeakers plus a unique merge function allows stereo sources such as keyboards to be summed mono, saving valuable input channels.Built tough to handle the abuse of live touring, the JDI features a 14-gauge steel I-beam inner frame and a unique book-end outer shell. The innovative design eliminates stress on the PCB, reducing opportunity for solder joints to go ‘cold’ while the outer shell creates a protective zone around the switches and connectors. The steel casing resists noise-causing electromagnetic pollution and the transformer’s sensitive inner workings are further protected from magnetic fields with a mu-metal can. This ensures the signal transfer is quiet and free from hum.These combined features have made the Radial JDI the most popular passive direct box in professional touring and an excellent choice for instrument interface in the studio! The Radial JDI… the world's finest passive direct box.Features:Jensen Transformer equipped passive DIEliminates hum and buzz from ground loopsVirtually zero phase & harmonic distortionExceptional signal handling and noise rejection

The Radial ProD2 is a compact stereo direct box developed specifically to address the needs and challenges of interfacing a stereo keyboard to a professional audio system. This passive DI features two independent channels with separate inputs and thru-puts for the artist's stage amp and two fully isolated outputs for the PA system.At the heart of the design are two high performance Eclipse ET-DB2 transformers. These deliver 20Hz to 20kHz performance with less than 1.5dB deviation above 18kHz and are able to withstand tremendous signal levels without distortion. Unlike active circuits that overload when the signal exceeds the rail voltage, transformers saturate. This creates a pleasing effect that naturally rounds out the tone, acting like a subtle limiter which is particularly advantageous when interfacing the ProD2 with digital pianos, samplers and drum machines that can produce excessive dynamics. Transformers are particularly adept at eliminating hum and buzz caused by ground loops.As with all Radial products, the ProD2 is built tough to handle the rigors of professional touring. A 14-gauge steel ultra rigid i-beam skeleton frame eliminates opportunity from outside stress to flex the sensitive PC board and cause premature solder joint failure. The innovative book-end design creates a protective zone around the connectors and switches further increasing lifespan. And a full bottom no-slip pad adds mechanical isolation and electrical insulation to further reduce opportunity for noise. The Radial ProD2's warm sound, legendary build quality and compact design have made it the most popular stereo direct box made today.Features:Stereo direct box designed for keyboardsSmooth, warm sound rounds out digital edgeAble to handle huge transients without chokingMay be rack mounted for touring rigs

The Radial X-Amp is an active Reamper™ that allows the engineer to play a pre-recorded track back through guitar amplifiers and pedals. This opens the door to explore new musical sounds and spur on the creative process so that your recording stands out.Using the X-Amp is easy: start by recording a dry track using a high quality direct box like the Radial J48. Send the new track from your recorder via the X-Amp to your guitar amps, effect pedals or combinations thereof. Once the basic track has been recorded, replacing or adding tracks can be done well after the session player has gone home. This eliminates tiresome repetition and assures a fresh vibrant performance on the final recording. Furthermore, by driving two amps at the same time, new sounds and textures can be created while allowing you to make artistic decisions as the recording progresses.Following the critically acclaimed Radial JD7 Injector, the X-Amp employs a unique class-A circuit design that has been optimized for use with guitars. Features include balanced line level input with LED peak indicator and level control, class-A circuit topology for optimal reach and frequency response, a transformer isolated output to eliminate hum and buzz caused by ground loops, a 180º polarity reverse switch to bring both amps into phase, and a dual ground lift switch for noise-free operation.As with all Radial products, the X-Amp is built like a tank to provide years of trouble-free performance. An internal I-beam skeleton provides maximum protection against external stress which could cause solder points to fail. This is supplemented with an innovative bookend design that creates a protective zone around the switches, potentiometer and connectors. A full bottom no-slip pad performs double duty by keeping the X-Amp from sliding around when placed on a vibrating amplifier while also providing electrical and mechanical isolation. Reamping works equally well on bass, keyboards, drums and voice. Once you start Reamping, you will never record any other way. The Radial X-Amp… the active Reamp® for professional recording engineers.Features:Active Reamp® with two outputs100% discrete class-A signal pathTransformer isolated to eliminate noiseVariable 'set & forget' level control

BEHRINGER's ULTRA-DI DI100 is your ultimate friend and helper on stage and in the studio. With this active DI box, hum and impedance problems are a thing of the past. Every conceivable sound source? Electric guitar, bass, keyboards or what have you ? Can be "tamed", sending it balanced and noisefree into your console. You can even connect a guitar amp's speaker output with up to 3,000 Watts.The ULTRA-DI can be powered by your console's phantom power or an internal 9-V battery ? the DI100 automatically switches between the two. The massive metal encasing and four rugged, oversized rubber corners keep it safe and reliable even under the toughest touring conditions. The rubber corners also allow you to stack several DI100's or place them on top of other gear without running the risk of ground loops. Professional, multi-functional active DI box for all studio and stage applications BEHRINGER OT-1 transformer for ultra-linear frequency response Super-rugged metal encasing with sturdy oversized rubber corners for increased reliability Internal battery automatically shut off when phantom power is connected Ultra-low noise operational amplifier for outstanding audio quality Gold-plated XLR and 1/4" input/output jacks (XLR balanced) Direct connection of amplifier outputs with up to 3,000 Watts Switchable input attenuation allows input levels of up to +50 dBu GROUND LIFT switch isolates grounding circuit for hum elimination Manufactured under ISO9000 certified management system

BEHRINGER's ULTRA-DI DI100 is your ultimate friend and helper on stage and in the studio. With this active DI box, hum and impedance problems are a thing of the past. Every conceivable sound source? Electric guitar, bass, keyboards or what have you ? Can be "tamed", sending it balanced and noisefree into your console. You can even connect a guitar amp's speaker output with up to 3,000 Watts.The ULTRA-DI can be powered by your console's phantom power or an internal 9-V battery ? the DI100 automatically switches between the two. The massive metal encasing and four rugged, oversized rubber corners keep it safe and reliable even under the toughest touring conditions. The rubber corners also allow you to stack several DI100's or place them on top of other gear without running the risk of ground loops.Professional, multi-functional active DI box for all studio and stage applicationsBEHRINGER OT-1 transformer for ultra-linear frequency responseSuper-rugged metal encasing with sturdy oversized rubber corners for increased reliabilityInternal battery automatically shut off when phantom power is connectedUltra-low noise operational amplifier for outstanding audio qualityGold-plated XLR and 1/4" input/output jacks (XLR balanced)Direct connection of amplifier outputs with up to 3,000 WattsSwitchable input attenuation allows input levels of up to +50 dBuGROUND LIFT switch isolates grounding circuit for hum eliminationManufactured under ISO9000 certified management system

The Radial ProAV2 is a passive direct box specifically developed with the audio-video integrator in mind. It has full two-channel stereo functionality. To eliminate the need for various adaptor, a "Swiss Army" array of connections are provided, including 1/4" for instruments, RCA and 1/8" connectors for consumer electronics and computers, and a +4dB XLR input for professional systems. Front panel connectors can also be used as thru-puts to allow multiple patch points.Custom wound transformers are employed, which are able to withstand exceptionally hot levels while maintaining linearity from 20Hz to 18.5kHz. The resulting smooth Bessel curve is warm and natural, making the ProAV2 Passive DI box particularly adept at handling digital sources that can sound harsh. Transformer isolation adds the benefit of eliminating ground loops that cause audio hum and buzz and video hum bars or snow.Features:Great-sounding, flexible passive DIHigh performance custom-wound transformerPro "Swiss Army knife" direct box for multi-mediaEasy to use passive ultra-quiet designEliminates ground loops causing hum and buzzHandle huge transients without distortionCompletely passive, no power neededXLR, 1/4", RCA and 3.5mm inputsBuilt-in stereo to mono merge function-15dB PAD for wide range of input levelsConverts hi-Z consumer to low-Z mic-levelConnect a stereo source to a mono channelUnbalanced audio from CDs, laptops, VCRsUltra-tough 14 gauge steel enclosureSpecifications:Frequency response: 20Hz to 20kHz +/- 2.5dBTotal harmonic distortion: 0.01% THD 20Hz to 20kHzInput: Unbal, high-ZOutputs: Balanced 600-ohm, mic-level, pin-2 hotInput pad: -15dBPower requirement: NoneSize: 3.25" x 5" x 1.875"Weight: 1.8 lbs.