Passive DI

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

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

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 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

DI box παθητικό.

Παθητικό DI για εξομάλυνση σήματος

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 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.