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PreSonus ADL 600 Two-Channel High-Voltage Tube
Preamp, Mic, line and instrument inputs, High-voltage, Class A,
dual-transformer, vacuum-tube preamp, 3 military-grade vacuum tubes per channel,
Input-source select, Variable mic-input impedance (150, 300, 900, 1,500 Ohms),
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), 8-segment, fast-acting LED metering (peaks and transients), 2U 19”
rack-mountable, rugged steel chassis, Internal power supply with standard IEC
connector
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General Information |
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Manufacturer |
PreSonus |
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Manufacturer Part Number |
ADL 600 |
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Product Name |
Two-Channel High-Voltage Tube Preamp |
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Marketing Information |
Simply the Best
We make some very good tube preamps, and we are confident that you enjoy
using them. But the ADL 600 is at another level. Rumor has it that some
people are willing to sell their left eyeball to get one. And while we
don’t accept eyeballs as payment, we do agree that the ADL 600 is the
finest tube preamp money can buy. Not the finest for the price. The
finest—period.
Designed by famed tube-circuit designer Anthony DeMaria, the ADL 600
employs a distinctive Class A, discrete design with three military-grade
vacuum tubes per channel, operating with ±300V power rails for maximum
headroom and superb tone. The dual-transformer design also ensures
low-noise operation, with maximum common-mode rejection.
We use only the finest components, including switched attenuators,
analog VU and LED meters, and custom-designed, proprietary transformers.
There are no op-amps or ICs in the signal path. We went high-end all the
way, right down to the last polypropylene film capacitor.
The result is an ultra-low-noise tube preamp with a big, warm, smooth,
clear, distinctive sound. It produces big, smooth, and articulate
vocals; deep and tight bass guitars; and rich, full mixes. It makes
virtually anything you run through it sound better.
Maximum Flexibility
Beyond superb sound quality, the ADL 600 is special because of its ease
of use and flexibility. Each of the two input channels has mic, line,
and instrument inputs, and you can select among four mic-input
impedances, so the preamp works great with any type of microphone. The
high-pass filter employs a rotary switch with three filter settings (40
Hz, 80 Hz, and 120 Hz at 6 dB/octave) for controlling room rumble and
low-frequency noise.
The input-gain attenuator is a military-grade rotary switch that
provides 5 dB stepped increments and a total preamplifier gain of over
73 dB. The output stage is controlled by a fully variable attenuator
that delivers ±10 dB of fine-tune trim adjustment, enabling you to dial
in the perfect gain structure for any application. And of course, you
get 48V phantom power and a 20 dB pad, controlled by big, sturdy,
military-grade switches.
We didn’t skimp on metering either. Fast-acting, eight-segment LED
meters accurately detect fast transients and peaks. Large, backlit
analog VU meters display output levels, and a -6 dB switch lets you
meter particularly hot signals.
Technical explanations are well and nice, but hearing is believing. Try
the ADL 600 yourself and experience the thrill of using the world’s
finest tube preamp. That will tell you all you need to know. |
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Features |
2 input channels, each with:
- Mic, line, and instrument
inputs
- High-voltage, Class A,
dual-transformer, vacuum-tube preamp
- 3 military-grade vacuum tubes
per channel
- Input-source select
- Variable mic-input impedance
(150, 300, 900, 1,500Ω)
- 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)
- 8-segment, fast-acting LED
metering (peaks and transients)
- > 73 dB of gain
Input/Output
- 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
Physical
- 2U 19” rack-mountable, rugged
steel chassis
- Internal power supply with
standard IEC connector
- Chassis ground link connectors
(lift chassis ground)
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Specifications |
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Input Impedence |
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Microphone |
Selectable, 150/300/900/1500 Ohm |
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Balanced Line |
2KOhm |
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Instrument |
100KOhm |
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Maximum Input Level |
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Microphone (1500Ohm, +20dB Pad out) |
+5dBu |
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Microphone (1500Ohm, +20dB Pad in) |
+25dBu |
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Balanced Line |
+30dBu |
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Instrument |
+30dBu |
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Gain Range |
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Microphone (1500Ohm, +20dB Pad out) |
18dB to 72dB |
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Balanced Line |
-12dB to 40dB |
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Instrument |
-5dB to 42dB |
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Noise Floor (all inputs, minimum gain) |
-95dBu (A-weighted) |
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Microphone Equivalent Input Noise (EIN) |
-125dBu (A-weighted) |
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Frequency Response |
10Hz to 45KHz +/- 1dB |
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Maximum Output Level |
+23dBu (@ 0.5%THD+N) |
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Output Impedance |
600 Ohm |
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Tube Complement (per channel) |
1-12AT7A, 2-6922 |
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General |
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Input Voltage (factory configured) |
115 or 230 VAC / 100Watts |
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Dimensions |
3.5" (H) X 17.0" (D) X 19.0" (W) |
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Weight |
28 lb |
A-20111227-1250-130-L
M-20161112-1250-191-L
*This item is BRAND NEW -
not refurbished. It comes with all manufacturer supplied accessories, and full
manufacturer's USA warranty.
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