Headphones Amps

Our entry model into the world of VOLTAiR headphone amplifiers. The Phonitor se has the same audio signal amplification as its bigger brothers Phonitor x and Phonitor xe and therefore offers the same sound experience. The DAC768xs is optionally available. Volume & Source Selection The volume is adjusted with a milled all-aluminium rotary knob. The Alps RK27 “Big Blue” potentiometer provides a pleasant “spoon in honey” turning feeling. In addition to an analog source, three other digital sources can be connected to the Phonitor se with the optional DAC. Headphone Output with Power The Phonitor se offers a 6.35 mm jack for connecting headphones with jack plug. Up to 2 x 5 watts of output power is available at this socket. This allows even very power-hungry headphones such as magnetostats or electrostats to be driven effortlessly. The Revolution in the headphone amplifier is the Phonitor Matrix, with switchable crossfeed, that allows you to listen to music through headphones with the sound experience of listening through speakers. The tiring super stereo effect and the exaggerated reproduction of reverberation and effects are a thing of the past. Enjoy your music without fatigue and exactly as it should be heard. The Phonitor Matrix in its largest expansion stage has three setting parameters: Crossfeed, Speaker Angle and Center Level.In Phonitor se the Center Level is preset to -1 dB and the speaker placement Angle to 30°. These are the most common values. The Crossfeed function determines the crosstalk of the channels, the so-called interaural level difference. There are two switch positions C1 and C2 for the intensity of the Crossfeed. Connections The Phonitor se is equipped with gold-plated RCA sockets for the analog input. The optional DAC768xs adds three more digital sources: USB Coax and Optical. The Optional DAC768xs The highly acclaimed AKM AK4490 Velvet Sound™ premium DAC chip is used as the converter chip in the optional digital-to-analogue converter, which thanks to its new architecture reproduces the finest sound details. It converts PCM audio with a resolution of 32 bits and a sampling rate of up to 768kHz, which corresponds to 16 times the CD resolution. Direct Stream Digital is also supported up to a resolution of DSD4 or DSD256.  Specifications: Analog input: RCA Maximum input gain: 32.5 dBu Input impedance: 20 kΩ Digital Inputs: DAC768xs (optional) Coaxial SPDIF (RCA), PCM sample rates: 44.1/48/88.2/96/176.4/192 kHz Optical SPDIF (Toslink F06), PCM sample rates: 44.1/48/88.2/96/with Glass fibre

The headphone monitoring amp and preamplifier with Phonitor Matrix. Phonitor 2 is the ultimate headphone amplifier for sound and mastering engineers who also mix and master on headphones. Speakers can also be connected, making Phonitor 2 a full-fledged monitor controller. Milled from the solid aluminum is the 45mm large volume knob. Its mass in combination with the motorized Alps RK27 “Big Blue” potentiometer further enhances the “spoon in honey” turning feeling. Remote control The volume can be adjusted with any infrared remote control, which Phonitor 2 simply learns. Just press the IR programming button on the back and then the buttons for louder and softer. Learning made easy This video explains how you can use any infrared remote control to remotely control the volume. Monitor Controller Features Sources: 2x XLR, 1x RCA Solo L/R Phase reversal for L and R Output switchable to headphones or speakers  Mute Phonitor Matrix with crossfeed, speaker angle and center level (the latter can be switched off) To The Power Amp or to the active loudspeakers it goes symmetrically via XLR sockets. Slave Thru The volume control can be switched off by means of a dip-switch on the bottom of the unit.  The Sources Two balanced and one unbalanced stereo sources can be connected to Phonitor 2. If a CD player or other HiFi equipment is connected to the RCA jacks, the consumer level can be raised from -10 dBV to 0 dBu using a dip switch on the bottom of the unit. In this way the sources are comparable in level. Mechanical VU Meter visualize the input levels, which can be switched in sensitivity with the VU Cal switch. Laterality By its very nature, hearing can be directed more to the left or more to the right. This is particularly evident when listening with headphones. That’s why Phonitor 2 has the finely resolved Laterality control. With it the center can be set perfectly. The Revolution in the headphone amplifier is the Phonitor Matrix, thanks to which you can create and evaluate your production through headphones in the same way as through speakers.  To achieve this, the super stereo effect must be corrected. It makes the placement of voices and instruments in the stereo image appear to be more widely distributed and effects like reverb and delays are overdone. 

Designed and manufactured in the United Kingdom, CALLIA embodies the Prism Sound uncompromising approach to audio resulting in the most accurate and detailed DAC available. Callia reveals the most minute nuance of any performance and is flexible in the face of a variety of genres. Hear your music the way it was intended. PRISTINE SOUND QUALITY Callia makes no compromises on audio quality, ensuring you’ll experience music at home exactly as it was experienced by those who created it in the studio. Our heritage and unrivaled experience has allowed for the creation of a DAC of unparalleled sonic clarity. HEADPHONE OUTPUT CALLIA’s headphone output boasts a high-current, low impedance design optimized for the best possible performance. Able to power a wide range of high end headphones, CALLIA will adjust and match the impedance of your headphones for an unbeatable listening experience. SIMPLIFIED CONNECTIVITY Callia is compatible with the widest range of computer hardware using a USB2 interface supporting UAC2 audio. Auto input detection and output protection allows for the hot plugging of cables without fear of damaging your speakers. UNSURPASSED CLOCKING AND JITTER REJECTION Prism Sounds long history in developing test and measurement equipment for the audio industry has provided Callia with the pinnacle of ultra-stable clocks, ensuring the most accurate and detailed conversion available. AUDIO FORMATS CALLIA supports linear PCM in 2’s complement binary coding and, using the “DSD over PCM” (DOP) protocol, DSD at the original bit-rate (DSD64) and also at 2 x the original rate (DSD128). DSD Files encoded as “DOP” may be played with both ASIO and WDM drivers. Your computer, tablet or transport will commonly decode formats such as mp3 to PCM prior to transmission to the sound card, so these formats will typically be supported on your device in the same manner as they would be with another sound card. On the S/P-DIF inputs, DOP can also be used, but only at the original DSD bit rate (DSD64) as these connections do not have enough bandwidth for DSD128. The ASIO native DSD format is not currently supported. Specifications: Dimensions: Table-top (including feet): 285 x 242 x 50mm Power: 90VAC – 250VAC, 50 – 60Hz 15W consumption 0.5A(T), 20mm, glass Inputs: 1 x USB Audio Device Class 2.0 1 x TOSLINK for S/PDIF 1 x RCA for AES3-ID Outputs: 2 x XLR (balanced) 2 x RCA (pseudo-balanced)

 Brooklyn is a reference USB2 DAC, line and phono analog preamplifier and a reference headphone amplifier.It integrates digital and vinyl hi-res playback for reference listening on headphones and speakers.SPECIFICATIONS :CONVERSION: up to 384k, 32bit PCM, native DSDup to DSD256,DXD, 130dB Dynamic RangeMQA HI-RES DECODER: built in certified hardwareMQA™ decoder DIGITAL INPUTS: USB2 Class2 (OSX, Linux driverless,all formats), AES/EBU (PCM up to 192k, up to DSD64 DOP), 2x S/PDIF (PCM up to 192k, up to DSD64 DOP), Toslink/ADAT 2x S/PDIF (PCM up to 192k, up to DSD64 DOP), SDIF3 DSD up to DSD256CLOCK: “Mytek Femtoclock Generator™” 0.82ps internal jitter, Wordclock Input and Output (allows stacking multiple units for multichannel operation,includesmch DSD)ANALOG OUTPUTS: RCA, balanced XLR, simultaneous,50 Ohm impedanceHEADPHONE OUTPUTS: Reference High Current,High transient Headphone Amp, 500mA, 6 Watts,dual headphone jacks, designed to drive hard todrive headphones.   BUILT-IN ATTENUATOR: Choice of 1dB step analog attenuator, separate for main out and head- phones,1dB step digital32 bit attenuator and purist relay bypass.BUILT-IN ANALOG PREAMP: Line level input orPhono M/M, M/C input, relay controlled.   AUDIO INTERFACE FUNCTION: All digital inputs canberoutedinto computer via USB2. Allows connectionof external digital sources such as CD Players anddigitizing ADCs.REMOTE: Included, universal remote capableFIRMWARE: Upgradable via USB Control panelWORLDWIDE POWER SUPPLYOPTIONAL DC/BATTERY POWER INPUT: 12VDCDIMENSIONS: WxDxH=8.5x8.5x1.74”=216x216x44mmWEIGHT: 4lbs, 2kgWARRANTY: 2 years  

Musical Fidelity has extensive experience making super headphone amps, the LX2-HPA builds on our decades of experience to deliver a great performer with beautiful, restrained and tasteful aesthetics. Technical PerformanceA headphone amplifier is like a small power amp, relative to the load (the headphones) the technical requirements are similar: Excellent load tolerance, high stability margins, low distortion, wide bandwidth, low noise, excellent channel separation.The LX2-HPA will easily drive any commercially produced headphone. It's high current delivery and excellent stability margins result in completely uncoloured neutral performance.Distortion at less than 0.0035%, wide band is vanishingly low and certainly inaudible.Bandwidth extends to about 80kHz and even at 40kHz the distortion remains well below 0.05%. A remarkable achievement.The outstanding noise ratio of better than 112dB means that the music comes from a true 'black velvet' background field.Stereo separation is excellent and assures a rock solid imaging experience. Talk about 'adventures in inner space! OverallThe LX2-HPA gives a sensual monitor level listening experience. Completely uncoloured sound delivered with virtually limitless dynamic range from a black velvet background, and perfectly placed spatial imagery. Technical Specifications:SpecificationsInput Impedance: 47KΩInput Sensitivity: 3.0mVTotal Harmonic Distortion: 0.01%Signal / Noise Ratio: >80dBGeneralPower Requirement: 12 - 24V 100mA RegulatedConnectionsRCA Input: 1pr RCA socketsRCA Output: 1pr RCA socketsHeadphone Output (6.3mm): 1 stereo jack socket (6.3mm)Headphone Output (3.5mm): 1 stereo jack socket (3.5mm)Power Input: DC Jack (1.3mm inner pin, outer diam. 3.5mmDimensionsLength (including terminals) 197mmWidth 172mmHeight (including feet) 46.5 mmWeightUnit alone: 1.05KgUnit with packing: 1.50KgIncluded accessoriesPower Supply: 12V 500mA

Musical Fidelity has extensive experience making super headphone amps, the LX2-HPA builds on our decades of experience to deliver a great performer with beautiful, restrained and tasteful aesthetics. Technical PerformanceA headphone amplifier is like a small power amp, relative to the load (the headphones) the technical requirements are similar: Excellent load tolerance, high stability margins, low distortion, wide bandwidth, low noise, excellent channel separation.The LX2-HPA will easily drive any commercially produced headphone. It's high current delivery and excellent stability margins result in completely uncoloured neutral performance.Distortion at less than 0.0035%, wide band is vanishingly low and certainly inaudible.Bandwidth extends to about 80kHz and even at 40kHz the distortion remains well below 0.05%. A remarkable achievement.The outstanding noise ratio of better than 112dB means that the music comes from a true 'black velvet' background field.Stereo separation is excellent and assures a rock solid imaging experience. Talk about 'adventures in inner space! OverallThe LX2-HPA gives a sensual monitor level listening experience. Completely uncoloured sound delivered with virtually limitless dynamic range from a black velvet background, and perfectly placed spatial imagery. Technical Specifications:SpecificationsInput Impedance: 47KΩInput Sensitivity: 3.0mVTotal Harmonic Distortion: 0.01%Signal / Noise Ratio: >80dBGeneralPower Requirement: 12 - 24V 100mA RegulatedConnectionsRCA Input: 1pr RCA socketsRCA Output: 1pr RCA socketsHeadphone Output (6.3mm): 1 stereo jack socket (6.3mm)Headphone Output (3.5mm): 1 stereo jack socket (3.5mm)Power Input: DC Jack (1.3mm inner pin, outer diam. 3.5mmDimensionsLength (including terminals) 197mmWidth 172mmHeight (including feet) 46.5 mmWeightUnit alone: 1.05KgUnit with packing: 1.50KgIncluded accessoriesPower Supply: 12V 500mA

Problem: A performer needs to hear him/herself through headphones exclusively or mixed with the output of a mixer, CD player, tape deck, or other stereo line level source. Only the mic signal, however, should be going to the main mixer.Solution: Connect MyMONITOR between the mic and line source, and the mixer. The Mic and line Monitor levels can then be adjusted for mix and volume through the headphones. Only the mic signal will go to the board. And since MyMONITOR can be AC or battery powered, the unit can be used on a large stage or wherever there is no AC outlet nearby. Dynamic or condenser mics can be used since phantom power would come through the Mic Thru jack from the mixer or other source.Specifications:Maximum Input Level: -20dB mic, 40dB MonitorOutput Impedance: 10 ΩSignal To Noise Ratio: 90dBGain: 15dB (1/4 in), 50dB (XLR)Power: LED indicatorDimensions: 4.5x2.75x1.5 inches (112mm x 72mm x 40mm)Weight: 1.3lb (590g)Power Requirements: 12V DC (Adapter included) or one 9V battery

The HeadAmp4 offers 1/8th-inch as well as 1/4-inch inputs and outputs as well as lower noise, lower distortion and more output in a new custom extruded stackable metal case.Ideal for virtually any home or project studio, the ARTcessories HeadAmp4 easily adds additional headphone outputs to any mixer, computer audio interface, workstation, iPod, media player or laptop without creating any additional load on the existing headphone source.Individual level controls for the four headphone outs, 1/4-inch and now 1/8th-inch connections allow the HeadAmp4 to connect to virtually any source, and drive any headphone configuration including studio phones, in-ear monitors or custom ear pieces or any combination of the above.Features:4 Output Channels Each with Individual Volume ControlStereo ¼-inch & 1/8-inch Inputs (Wired Parallel)Can be Connected to Any Line-Level Source or Headphone OutputFour Stereo ¼-inch & Four 1/8-inch Headphone OutputsPower "On" LEDSpecifications:Maximum Input Level: +14dBVInput Impedance: 90.9k ΩMaximum Output Level: +14dBuMaximum Gain: 20dBOutput Impedance: 47 Ω (each output)Frequency Response: 20 - 20 kHzSignal To Noise Ratio: > 90dB (ref 0dBu)Total Harmonic Distortion:

Omnitronic LH-030 4-channel headphone amplifier.Features:Distributes the signal of 1 audio source to 4 sets of headphones4 channels with separate level controls and headphone outputsAll connections via 6.3 mm jacks (1/4")Operation via supplied power unitSpecifications:Power supply: 12 V DC, 150 mAInput impedance: 100 kohms unbal.Max. input level: +14 dBInput impedance: 100 kohmsOutput impedance: 51 ohmsGain: 20 dB/channelT.H.D.: 0.008 %Frequency range: 20-20000 HzS/N ratio: >90 dBDimensions: 113 x 73 x 40 mmWeight: 340 g

Perfect for studios, practice spaces, quiet stages, and more, the HM Series offers everything you need whether it is just splitting a single signal to your band, or more complex headphone distribution. Whether you need to expand your home studio headphone monitoring capability or add robust cue mix distribution, the affordable HM Series offers the sound quality, reliability, and flexibility you need to expand your setup. The two 19" rackmount models, the HM-400 and HM-800, deliver flexible, robust headphone distribution for studios, practice spaces and more.Features:Distribute Signal to 16 HeadphonesTwo Stereo Main Inputs via 1/4" JacksTwo Stereo Main Outputs via 1/4" JacksTwo 1/4" Headphone Outputs per Channel

Perfect for studios, practice spaces, quiet stages, and more, the HM Series offers everything you need whether it is just splitting a single signal to your band, or more complex headphone distribution. Whether you need to expand your home studio headphone monitoring capability or add robust cue mix distribution, the affordable HM Series offers the sound quality, reliability, and flexibility you need to expand your setup. The two 19" rackmount models, the HM-400 and HM-800, deliver flexible, robust headphone distribution for studios, practice spaces and more.Features:XLR & 1/4" Stereo Inputs and OutputsThree Headphone Outputs per ChannelPer-Channel 1/4" Stereo Aux Input2-Band EQ, Balance, and Output Controls

Whether you need to expand your home studio headphone monitoring capability or add robust cue mix distribution, the affordable HM Series offers the sound quality, reliability, and flexibility you need to expand your setup.The ultra-compact HM-4 offers a simple yet effective way to split a single stereo signal out into four pairs of headphones. Perfect for quickly splitting a phones mix in the studio or even crowding around a tablet to watch a movie at home.Features:Distribute a stereo input signal to up to four pairs of headphonesIdeal for musicians in home and studio recording sessionsOne unbalanced 1/4" TRS stereo inputFour unbalanced 1/4" TRS stereo headphone outputsDedicated per-output level control allows each person to set a different listening volumeFront-panel power status indicatorHeavy-gauge steel chassis for long-lasting durability in the studio or on the roadIncludes 12 VDC power supply 

The new irDAC-II continues the story adding Bluetooth connectivity, headphone output and DSD128 support. The irDAC-II comes packed with cutting edge technology and features that will benefit the most demanding user. We have gained a lot of knowledge developing class leading DACs. Areas like isolation of the digital and analogue stages, ultralow noise power supplies and a direct coupled signal path make a big difference.Using the outstanding ESS Sabre DAC to obtain performance that we believe will be unmatched in this price category. Jitter reduction is an obsession within our engineering team. They have applied their experience in the irDAC-II to produce a signal that is almost jitter free. The headphone output stage has been taken from the flagship A49 amplifier and is capable of driving the most demanding of headphones. Both fixed and variable line outputs are also available, allowing for ultimate system building flexibility.The irDAC-II is designed to be the heart of a digital system and can be connected to a host of different types of digital sources and connections. This includes asynchronous USB and Bluetooth. All of the inputs can be controlled through an IR remote that will also give you transport control of a PC or Mac USB source via the HID (Human Interface Device) control.Specifications:Input: USB, SPDIF, optical, BluetoothFrequency Response: 20Hz:20kHz, +/:0.1dBTotal Harmonic Distortion + Noise: 0.0007%Signal-to-noise ratio (A:weighted): 117dB (24:bit)Maximum output level: 2.1V RMSUSB: 32kHz, 44.1kHz, 48kHz, 88.2kHz, 96kHz, 176.4kHz, 192kHz, 384kHzOptical: 44.1kHz, 48kHz, 88.2kHz, 96kHzCoaxial: 44.1kHz, 48kHz, 88.2kHz, 96kHz, 176.4kHz, 192kHzBluetooth: SBC, AAC, aptX, aptX:LLBit Depth : 16:bit, 24:bitHeadphone : 30Ω : 600Ω, 3.5mm plugPower requirements: 18W maxDimensions: W194 x H44 x D124mmWeight: 1.1kg

All essential functions in a stylish, slim housing. The Phonitor e offers Phonitor Matrix, volume remote control, connection also for balanced headphones, DA converter option and the all superior VOLTAiR technology. For all headphones The Phonitor e offers connections for standard headphones with jack plug and for balanced headphones a 4-pin XLR connector. Thanks to the high output power, all headphones are driven effortlessly. Volume with remote control The volume is adjusted with a milled all-aluminium rotary knob. The Alps RK27 “Big Blue” potentiometer provides a pleasant “spoon in honey” turning feeling. The volume can be adjusted with any infrared remote control. The Phonitor e learns their commands. To do this, press the IR programming button on the back and then the buttons for louder and softer. Source selection A total of five sources can be connected to Phonitor e: XLR, Cinch, USB, Coax, and Optical Phonitor e is equipped with RCA connectors and balanced XLR connectors for the analog inputs. The optional DAC768xs adds three more digital sources: USB, Coax and Optical. The optional DAC768xs The converter chip used in the optional digital-to-analog converter is the highly acclaimed AKM AK4490 Velvet Sound™ premium DAC chip, which thanks to its new architecture reproduces the finest sound details. It converts PCM audio with a resolution of 32 bits and a sampling rate of up to 768kHz, which corresponds to 16 times the CD resolution. Direct Stream Digital is also supported up to a resolution of DSD4 or DSD256.  The Revolution in the headphone amplifier is the Phonitor Matrix, with switchable crossfeed, thanks to which you can listen to music with headphones as if you are listening to speakers. The tiring super stereo effect and the exaggerated reproduction of reverberation rooms and effects are a thing of the past. Enjoy your music without tiring and exactly as it should be heard. The Phonitor Matrix, in its largest expansion stage, has three adjustment parameters: Crossfeed, Speaker Angle and Center Level. In Phonitor e the center level is preset to -1 dB and the speaker angle to 30°. These are the most common values. The crossfeed function determines the crosstalk of the channels, the so-called interaural level difference. There are two switch positions C1 and C2 for the intensity of the crossfeed. Specifications:   Analog Inputs: XLR (balanced), RCA Maximum input gain: 32.5 dBu Input impedance: 20 kΩ Digital Inputs: DAC768xs (optional) Coaxial SPDIF (RCA), PCM sample rates: 44.1/48/88.2/96/176.4/192 kHz Optical SPDIF (Toslink F06), PCM sample rates: 44.1/48/88.2/96/with Glass fibre

The headphone amplifier with preamplifier Enjoy music over headphones and over speakers equally excellently with the superior VOLTAiR technology – that’s why we developed Phonitor x. For all headphones The Phonitor x offers connections for standard headphones with jack plug and for balanced headphones a 4-pin XLR connector. Thanks to the enormous output power of 18 watts, all headphones are driven effortlessly. To the power amplifiers or to the active loudspeakers you can use the balanced XLR- for long, and the RCA sockets for short cable runs. Practical are the AMP CTL sockets to which power amplifiers with 12V trigger inputs can be connected to switch them on and off together with Phonitor x. Milled from solid is the big 45mm Volume control. Its mass together with the  motorized Alps RK27 “Big Blue” potentiometer enhances the “spoon in the honey” feeling even further. The red marker LED makes the setting visible even in darkened environments. Volume RC The volume can be remote controlled with any infrared remote control, that the Phonitor x simply learns. To do this, press the IR programming button and then the buttons for louder and quieter. Source of joy Up to six (6 !) stereo sources can be connected to Phonitor x: XLR, RCA, USB, Coax, Optical and AES/EBU Phonitor x accepts a large variety of audio connections. Balanced via XLR or unbalanced via RCA connectors. With the optional DAC768xs, three additional digital sources can be added. The DAC768xs The highly acclaimed AKM AK4490 Velvet Sound™ premium DAC chip is used as the converter chip in the optional digital-to-analogue converter, which thanks to its new architecture reproduces the finest sound details. It converts PCM audio with a resolution of 32 bits and a sampling rate of up to 768kHz, which is equivalent to 16 times CD resolution. Direct Stream Digital is also supported up to a resolution of DSD4 or DSD256. Good ol' times Two mechanical VU meters visualize the input levels for the left and right audio channel. Finding the middle is not always easy. By our very nature, hearing can be leaning more to the left or more to the right. This is especially obvious when listening with headphones. That’s why Phonitor x has the uniquely finely resolved laterality control. With it, the center can be found perfectly. With the mode switch you can choose between stereo or mono playback. To the right, the laterality control is switched on. The Revolution in the headphone amplifier is the Phonitor Matrix, thanks to which you can listen to music through headphones as if you were listening through speakers. The tiring super stereo effect is a thing of the past. Enjoy your music exactly the way it should be heard.  Specifications: Analog inputs & outputs: XLR (balanced) and RCA Maximum input & output gain: 32.5 dBu Input impedance (RCA): 20 kΩ Input impedance (XLR): 20 kΩ Output impedance: 75 kΩ Common mode rejection (XLR): 82 dB Frequency range (-3dB): 4 Hz – 300 kHz THD + N (10 Hz – 22 kHz, 0 dBu): 0.00085 % Noise (A-weighted): -103.8 dBu Crosstalk (1 kHz): -106 dB Dynamic range: 136.3 dB Digital Inputs: DAC768xs (optional) Coaxial SPDIF (RCA), PCM sample rates: 44.1/48/88.2/96/176.4/192 kHz Optical SPDIF (Toslink F06), PCM sample rates: 44.1/48/88.2/96/with Glass fibre

Years of experience in making high quality headphone amps have been distilled into the design of the MX-HPA. As a result, this fully-balanced headphone amp offers an awe-inspiring listening experience.The MX-HPA’s technical performance is stunning. Typically, distortion from 20 Hz to 40 kHz is less than 0.005%. Signal-to-noise ratio is better than 120dB (‘A’ weighted). Frequency response is ruler flat from 10 Hz to 20 kHz (-0.1dB).The MX-HPA is capable of a short-term peak of 10 watts (for one cycle) and has two gain positions: 18dB (8X) and 24dB (15X). Inputs are either balanced or single-ended. The MX-HPA will automatically convert single-ended inputs to balanced. The MX-HPA is genuinely fully balanced from beginning to end.Specifications:OutputPower 1.8 Watts per channel into 8 Ohms (27dBW)Maximum output voltage 19 Volts RMS, 20Hz to 20 kHzOnset of clipping (54 Volts peak-to-peak) balancedLine inputTHD+N >0.005% typical, 20Hz to 20 kHzSignal / noise ratio >120dB ‘A’-weightedInput impedance 50k OhmsFrequency response +0, –0.1dB, 10Hz to 20 kHzGain, LO position (volume max) 18db (8x)Gain, HI position (volume max) 24dB (15x)ConnectionsLine level inputs1 pair line level XLR (balanced) connectors1 pairs line level RCA connectorsHeadphone outputs1 pair 3-pin XLR/¼” stereo Jack combined socketsPower requirementMains voltages 90-250VAC 50-60Hz universal worldwide supplyConsumption >0.25 Watts standby (Orange LED lit)15 Watts maximum (Blue LED lit, full power output)GeneralDimensions - WxHxD (mm): 220 (82/3”) x 53 (2”) x 240 mm (9½”)Weight (unpacked / packed): 2.2 kg (5 lbs) / 3.7 kg (8¼ lbs)

Multi way Headphone amplifier 

Headphone amplifier rack mountable 4 regulated expenses for acoustic array.

Compact, Portable Headphone Amp / DAC / PreampThe m900 is a portable, desktop friendly headphone amplifier / DAC / preamp combo designed to give audio professionals and enthusiasts musical and transparent audio playback from USB, S/PDIF or TOSLINK sources. For small DAW studio setups, portable laptop editing or mixing rigs, or just pure playback enjoyment, the m900 provides the same analog and DAC quality as our large monitor controllers, but in a rugged, portable and surprisingly affordable unit.The m900 DAC uses the latest generation AKM 4490 chip, which features 32-bit processing and supports sample rates up to 384kHz PC or 256x DSD. The USB interface operates in asynchronous mode allowing the m900 to be the clock master which makes the system immune to USB bus jitter. S/PDIF and Toslink inputs allow the m900 to enhance to any DAW interface with true reference quality D/A conversion, headphone monitoring and stereo speaker control.An intelligent power supply design allows for two power operation modes - LOW and HIGH. LOW power mode is from USB connector #1, which provides bus power along with data, allowing the m900 to operate from a single connection to your computer. HIGH power power mode is available by connecting the included 2A USB DC power supply to the USB connector #2, which provides additional power harder to drive headphones.Transimpedance amplifier topology coupled to a zero ohm output impedance driver provides headphone performance that is incredibly spacious and transparent with a tight, enveloping low end. Our latest generation crossfeed circuit rounds out the design by simulating an acoustic listening environment in the headphones. Familiar tracks become new again with surprise details, while audio production tasks like tracking, mixing and editing happen faster and easier.After many years of honing our DAC and headphone amplifier designs, the m900 distills the best of what we've learned in a compact, rugged and simple unit. Weather in the studio, on your desk or on the road, the m900 will bring you closer to the music you love. Features:USB, S/PDIF and Toslink digital inputs, supports up to 192kHz (Toslink up to 96kHz)Asynchronous USB interface for jitter free computer audio playback, supports up to 384kHz PCM and 256x DSDDual zero ohm output impedance headphone outputsUnbalanced level controlled outputs via RCA for connecting to a stereo monitor systemCompact, portable chassis perfect for travel, desktop or studioLow power mode via USB Bus powerHigh power mode via included USB 2A power supply4 different DAC filter settings to tailor playback performance to personal preferenceSimple user setup menu for setup and calibration7 segment LED display displays level and setup menu informationLarge rotary encoder for volume control and setup menu navigationMade in Lyons, CO USA5 year transferable Warranty

Tired of straining to hear underpowered headphones? The PreSonus® HP4 headphone-distribution system is louder than you're ever likely to need for session and stage use. (Be careful with that level control!) Yet the sound is clear and clean, with a wide dynamic range. At last, everybody will be able to hear!Simplicity is the HP4's hallmark. It offers left and right line inputs, left and right line outputs with level control, and four headphone outs. You can sum the stereo signals to mono, adjust the individual headphone levels, and mute the rear-panel Monitor outputs while leaving the headphone outputs active. So while the HP4 is simple to set up and use, it has all the features you need to create a versatile headphone system.The compact HP4 can sit on a tabletop or can be screw-mounted to a standard rack tray (not included), where it requires just one-third of a rackspace. If your needs grow, you can use the line outputs to feed the inputs of a second HP4 or the larger HP60 headphone amplifier.So quit struggling with mediocre headphone amps. Get the PreSonus HP4 and hear everything loud and clear. You owe it to your music.Features4 screaming-loud (130 mW per channel) stereo ¼-inch headphone outputs (front panel2 balanced ¼-inch line outputs (monitor outputs)2 balanced ¼-inch line inputsHeadphone level control for each channelMono summing switch for each channelMonitor level control and mute switchDaisy-chain multiple units via monitor outputsCompact 1/3U rack-mount chassisSealed, detented, metal rotary controlsExternal 16 VAC power supply