PreSonus ADL600 2 Channel High Voltage Tube Preamp

1,899.00 RRP 2,065.00 (including VAT @ 23%)

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  • High-Voltage Class A Dual Transformer Design
  • Selectable Microphone Input Impedance
  • Switched Gain and Variable Fine Trim Controls
  • Microphone, Instrument and Line Inputs
  • Ultra Low Noise (-100dB S/N ratio)

PreSonus ADL600 2 Channel High Voltage Tube Preamp

The ADL 600 by PreSonus is a high voltage 2 channel microphone preamplifier that has been designed by world-renown analog tube circuit designer Anthony DeMaria. The ADL 600 also features a discrete Class A design with three vacuum tubes per channel for maximum headroom and tonality as well as being hand built in the USA.

Product Ref: 50641

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PreSonus' ADL 600 contains some of the gratest components in the world including switched attenuators, military-grade vacuum tubes, analog VU and LED meters, custom-designed proprietary transformers, and much more. All of which, when combined, create a warm, smooth and precise sound that is not rivaled.

The ADL 600 by PreSonus was created to provide ultimate sonic performance, and is also simple to use and versatile, thanks to its ability to allow for many types of input sources, which sets it ahead of other preamps. The input selector allows you to select between Hi-Z instrument input, line input, and 4 different microphone impedances for a wide variety of sounds and applications, all adding to the versatility.

The ADL600's High Pass Filter is a rotary switch that has 3 filter settings (40Hz, 80Hz, and 120Hz @ 6dB per octave) for passively and unobtrusively controlling room rumble and low frequency noise. The input gain attenuator is a military-grade rotary switch delivering 5dB step increments and a total preamplifier gain of over 72dB.

The output stage onboard the ADL600 is controlled by a fully variable conductive plastic attenuator that delivers +/- 10dB of fine tune trim adjustment that helps to set the perfect gain structure for the situation. The ADL 600 also includes 48V phantom power and a -20dB pad both controlled by big sturdy military grade switches.


2 input channels, each with:
  • Mic, line, and instrument inputs
  • High-voltage, Class A, dual-transformer, vacuum-tube preamp
  • 3 military-grade vacuum tubes
  • Input-source select
  • Variable mic-input impedance (150, 300, 900, 1,500?)
  • Variable high-pass filter (40, 80, 120 Hz)
  • 8-position Gain switch Variable Trim adjustment for final stage
  • 48V phantom power
  • -20 dB pad
  • Polarity-reverse switch
  • Backlit VU meter (output level) with -6 dB switch (for metering hot signals)
  • > 73 dB of gain
  • 2 unbalanced ¼? instrument inputs (front panel)
  • 2 transformer-balanced XLR line inputs
  • 2 transformer-balanced XLR mic inputs
  • 2 transformer-balanced XLR line outputs
  • 2U 19? rack-mountable, rugged steel chassis
  • Internal power supply with standard IEC connector
  • Chassis-ground link connectors (lift chassis ground)


Input Impedance
  • Microphone : Selectable, 150/300/900/1500 Ohm
  • Balanced Line: 2 k Ohm
  • Instrument: 100 k Ohm
Maximum Input Level
  • Microphone (1500 Ohm, +20 dB Pad out): +5 dBu
  • Microphone (1500 Ohm, +20 dB Pad in): +25 dBu
  • Balanced Line: +30 dBu
  • Instrument: +30 dBu
Gain Range
  • Microphone (1500 Ohm, +20 dB Pad out): 18 dB to 72 dB
  • Balanced Line: -12 dB to 40 dB
  • Instrument: -5 dB to 42 dB
  • Noise Floor (all inputs, minimum gain): -95 dBu (A-weighted)
  • Microphone Equivalent Input Noise (EIN): -125 dBu (A-weighted)
  • Frequency Response: 10 Hz to 45 kHz ±1 dB
  • Maximum Output Level: +23 dBu (@ 0.5 THD+N)
  • Output Impedance: 600 Ohm
  • Tube Complement (per channel): 1-12AT7A, 2-6922
  • Internal supply, standard IEC connector: 115 or 230 VAC / 100W
  • Dimensions: 2U rackmount
  • Height: 3.5"(88.9 mm)
  • Depth: 17" (431.8 mm)
  • Width: 19"(482.6 mm)
  • Weight: 28 lb. (12.7 kg)
Your order may be delivered with a plug adapter
If any electrical items in your order are supplied with a United Kingdom plug connection, a suitable plug conversion adapter will be included free of charge.