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PRESONUS DigiMax D8 (Front Angle view)
PRESONUS DigiMax D8 (Front Angle view)

PRESONUS DigiMAX D8 - 8-Channel Preamp with 24-bit/48 kHz ADAT Out

On sale $589.00
Retail Price:$739.99
Your Savings:$150.99(20%)
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Part Number:475
  • Input/Output:2 unbalanced ¼” instrument inputs (front panel; bypass Ch. 1 and 2 mic inputs); 8 balanced rear-panel XMAX mic preamps; 1 BNC word-clock input; 8 balanced ¼” direct outputs (1 per channel); 1 ADAT Lightpipe optical digital output (8 channels)
  • Meters, Controls, and Features:Individual channel-trim controls with -4 dB to +50 dB gain range; 48V phantom power for condenser microphones (switchable in pairs); -20 dB pad on every channel; 4-segment, fast-acting LED input meter; Clock source (sets clock to external or internal with 44.1 or 48 kHz sample rate)
  • Digitalia:Professional-quality AD converters (+107 dBu dynamic range); ADAT Lightpipe digital output: 8 channels at 24-bit resolution and 44.1 and 48 kHz internal sampling rate; Word-clock master via ADAT Lightpipe or slave to external word clock
  • Power:Internal power supply with standard IEC connector
  • Physical:1U rack-mountable, rugged steel chassis
PRESONUS DigiMAX D8 - 8-Channel Preamp with 24-bit/48 kHz ADAT Out

A high-quality microphone preamp can make all the difference in the sound of your recordings. Without a quality preamp, the expression “garbage in, garbage out” is especially apt. And customers and reviewers alike have long insisted that the PreSonus XMAX™ Class A solid-state preamp is the finest in its price class.

The DigiMax D8 provides eight of these prized preamps—enough to raise your entire studio rig to a higher level. And that’s just the beginning of the story.

The Lightpipe Kid

With its eight XLR mic inputs and eight ¼” balanced, direct channel outputs, you can route each channel’s signal independently. This makes the DigiMax D8 a premium front end for virtually any system.

And thanks to its eight-channel, 24-bit ADAT Lightpipe output (which operates at 44.1 or 48 kHz), the DigiMax D8 provides an excellent front end for Lightpipe-equipped digital-audio devices, such as Avid's Digi 003. You’ll immediately hear the improvement.

Better yet, add a DigiMax D8 to a Lightpipe-equipped PreSonus AudioBox 1818VSL. This combination provides a two-rackspace rig with 16 XMAX-equipped recording channels—enough to record an entire live band.

To keep your digital audio in sync with ultra-low jitter, the D8 receives word clock at its BNC connection and sends word clock via Lightpipe.

The ADAT Optical interface—commonly referred to as “Lightpipe”—was originally designed by Alesis for use with its revolutionary eight-channel ADAT digital tape recorders. The interface uses fiber-optic cable to transfer a high-speed serial bitstream carrying up to eight channels of 24-bit, 44.1 or 44.8 kHz digital audio between compatible devices.

ADAT Lightpipe employs a Toslink optical connector, which is the same connector used for S/PDIF optical transfers but the two datastreams are mutually incompatible. It always transfers at 24-bit resolution; for example, if a 16-bit signal is sent via Lightpipe, the first 16 bits carry the audio information and the remaining bits are a string of zeros.

The Lightpipe is “hot pluggable”; you don’t have to turn off the devices when plugging or unplugging the optical cable. However, you should turn down the master level because making and breaking optical connections creates a significant signal spike that can damage your speakers.

Transferring digital audio via Lightpipe is simple, and fiber-optic cables are not subject to electromagnetic and radio-frequency interference. Furthermore, you can use fairly long cable runs; a 16-foot optical cable is no problem.

However, it is important to protect your optical cables from sharp bends and turns, as the cables are relatively fragile and are almost impossible to repair without specialized tools. Don’t stand on optical cables or put heavy weight on them.

Note that Lightpipe ports emit a red light beam. The beam is harmless. However, it’s important to keep the optical ports clean, so cover them with the small plastic plugs that come with your unit when the ports are not connected to cables.

Careful, It’s Loaded!

In addition to its eight rear-panel mic inputs, the DigiMax D8 offers two front-panel instrument inputs so you can conveniently plug guitars into your system. All outputs are in the rear, keeping the wiring out of your face.

All of the key features you need are here: all eight preamps include variable trim control, 48V phantom power (switchable in odd-even pairs), ultra-fast acting LED metering, and a 20 dB pad.

The DigiMax D8 is a great solution for adding eight professional microphone preamplifiers to any digital recording system, especially a system with ADAT Optical expansion capability. It’s the perfect choice for expanding an AudioBox 1818VSL. And the price is so reasonable that your budget won’t need to expand!



Input TypeXLR 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)1600Ω
THD+N (unwtd, 1 kHz @ +4 dBu Output, Unity Gain)< 0.003%
EIN (unwtd, 55 dB Gain, 150Ω Input, 20 Hz to 22 kHz)-126 dBu
S/N Ratio (Unity Gain, unwtd, Ref. = +4 dBu, 20 Hz to 22 kHz)>101 dB
Common Mode Rejection Ratio (1 kHz, 55 dB Gain)> 55 dB
Gain Control Range (±1 dB)-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)+4 dBu (-6 dBFS)
Yellow (±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)

Type¼” TRS Female Unbalanced
Input Impedance1 MΩ

Line Outputs

Type¼” TRS Balanced
Output Impedance51Ω

Digital Audio

ADC Dynamic Range (A-wtd, 48 kHz sample rate)107 dB
Bit Depth24
Reference Level for 0 dBFS+10 dBu
Internal Sample Frequency, Selections44.1, 48 kHz
External Sample Frequency, Input75Ω BNC


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


Dimensions1U rackmount
Height1.75” (44.45 mm)
Depth7” (177.8 mm)
Width19” (482.6 mm)
Weight6 lbs. (2.72 kg)

As a commitment to constant improvement, PreSonus Audio Electronics, Inc., reserves the right to change any specification stated herein at anytime, without notification.

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