PreSonus DigiMax D8 8-Channel Preamplifier

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The perfect solution for adding 8 professional mic preamps to any digital recording system or digital mixer with ADAT input.

The DigiMax D8 is an 8-channel preamplifier featuring 8 award-winning class A XMAX mic preamps with 24-bit ADAT digital output. All eight preamps include variable trim control, 48V phantom power, ultra-fast acting LED metering and 20 dB pad. In addition, 2 instrument inputs are located on the front panel for direct Hi-Z instrument input. Balanced TRS direct analog outputs are located on the rear panel for routing and flexibility. The DigiMax D8 also includes word clock sync input for ultra-low jitter and robust synchronization.

The DigiMax D8 is the perfect solution to add eight professional microphone preamplifiers to any digital recording system with ADAT optical lightpipe expansion capability including Digidesign's HD and 003 systems, RME, YAMAHA, Alesis, Mackie, and many others.

8 XMAX Class A PreamplifiersThe DigiMax D8 includes eight custom-designed high-voltage, discrete, XMAX Class A microphone preamplifiers for all types of microphones. The job of a microphone preamplifier is to boost microphone level signals to line level so that the signal can be converted from analog to digital. This mic to line boost is generally a preamplification of over 400 times the voltage of the original mic level signal. This preamplification stage is one of the most important stages that the signal will go through before converted to digital, and is why a high performance preamplifier is important to achieving great results.

All XMAX preamplifiers are built with the same three elements:

High Voltage-The XMAX preamplifier runs on power rails of 30V. Most off the shelf op amp based designs run on power rails of 10V to 18V. Higher voltage power rails deliver more headroom, deeper lows, smoother highs and an overall fuller sound.

Discrete-No op amps. Only transistors, resistors and capacitors. Op amps add noise, coloration and harshness to a signal. Discrete designs deliver ultra low noise and transparency.

Class A-When a circuit is running in Class A mode the circuit is always in an "on" state operating at its optimal voltage requirements. Class A mode has zero crossover distortion and delivers purer, clearer and more musical sonics than class A/B designs which are found in most op-amp circuits.

The net result of the XMAX preamp design is high headroom, low noise, wide dynamic range and wide frequency range, and most importantly, musicality and transparency - smooth highs, solid deep lows, and everything in between.

  • 8 XMAX class A microphone preamps with trim control
  • 24-bit resolution ADAT digital output
  • 44.1 and 48K sampling rates
  • External sync via BNC word clock input
  • Direct outputs on every channel
  • LED input metering
  • -20dB Pad on every channel

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DigiMax D8 8-Channel Preamplifier Specifications:

  • Microphone Preamplifier
    Type: XLR Female Balanced
    Frequency Response (+/-0.5 dB): 20 Hz to 50 kHz
    Frequency Response (+/-3.0 dB): 20 Hz to 150 kHz
    Input Impedance (Balanced): 1600 Ohms
    THD+N (unwtd, 1 kHz @ +4 dBu Output, Unity Gain): < 0.003%
    EIN (unwtd, 55dB Gain, 150 Ohms Input, 20Hz to 22 kHz): -126 dBu
    S/N Ratio (Unity Gain, unwtd, Ref. = +4 dBu, 20Hz to 22 kHz): > 101 dB
    Common Mode Rejection Ratio (1 kHz, 55 dB Gain): > 55 dB
    Gain Control Range (+/- 1dB): -4 dB to 50 dB
    Maximum Input Level (Unity Gain, 1 kHz @ 0.5% THD+N): +14 dBu
    Signal Level LEDs: +10 dBu (0 dBFS)
    Red / Clip (+/-0.5 dBu): +10 dBu (0 dBFS)
    Yellow (+/-0.5 dBu): +4 dBu (-6 dBFS)
    Green (+/-0.5 dBu): 8 dBu (-18 dBFS)
    Green (+/-0.5 dBu): 14 dBu: (-24 dBFS)
    Phantom Power (+/-2 VDC): +48 VDC

    Instrument Input (channels 1 and 2 only)
    Type: ¼" TRS Female Unbalanced
    Input Impedance: 1 MOhms

    Line Outputs
    Type: ¼" TRS Balanced
    Output Impedance51 Ohms

    Digital Audio
    ADC Dynamic Range (AWTD, 48 kHz Sample Rate): 107dB
    Bit Depth: 24
    Reference Level for 0dBFS: +10 dBu
    Internal Sample Frequency Selections (kHz):44.1, 48
    External Sample Frequency Input: 75 Ohms BNC

    Input Connector Type: IEC
    Input Voltage (factory configured): 90 to 230 VAC
    Power Requirements (Continuous): 20W

    Package Type: 1U - steel chassis
    Dimensions: 19(W) X 1.75(H) X 7(D) inches
    Weight: 6 lbs. (2.72 KG)
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by PowerReviews
PreSonusDigiMax D8 8-Channel Preamplifier

(based on 1 review)

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(4 of 4 customers found this review helpful)


Digimax D8 - Got The Hook Up


from Unicoi,TN

Comments about PreSonus DigiMax D8 8-Channel Preamplifier:

I just got my hands on this unit today and I couldn't believe how easy it was to get up and running. I wanted to add 8 more mic input channels to my Digidesign Digi002 Rack ( PC running Windows XP Home), And wanted the best for my budget. And I made the right decision with the Digimax D8. I only had to run one ADAT(Optical) cable from the Digimax D8 ADAT output, to the ADAT input on my Digi002 Rack. And, BAM, I was ready to go. I looked for this wiring diagram online,but couldn't find one. After installation and wiring is done just turn on the D8,then the 002 Rack,then the computer (in that order). If you hear clicking/popping noise, Open ProTools,click Hardware,Setup,and set the clock to ADAT. You may need to restart. Presonus makes very good preamps and the D8 is no exception. These preamps sound just as good as the Digidesign. The D8 is advertised as an addition to the Digidesign Digi003 and other DAW's,but the Digi 002R is not mentioned. I am here to testify,that it works perfectly. Another note: Presonus has very good customer service. They tell you to call back if needed.

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