


Review Summary
Microphone: Selectable, 150/300/900/1500 Ohms
Balanced Line: 2 k Ohms
Instrument: 1 M Ohms
Microphone (1500 Ohms , +20 dB Pad out): +10 dBu
Microphone (1500 Ohms , +20 dB Pad in): +30 dBu
Balanced Line: +30 dBu
Instrument: +20 dBu
Microphone (1500 Ohms , +20 dB Pad out): +6 dB to +70 dB
Balanced Line: -20 dB to +40 dB
Instrument: -20 dB to +40 dB
Type: 2nd-order shelving filter
Q: 0.55
Low Band (Low-pass or Bandpass): 20 Hz to 250 Hz, +/-16 dB
Low-Mid Band: 160 Hz to 2 kHz, +/-16 dB
High-Mid Band: 800 Hz to 8 kHz, +/-16 dB
High Band (High-pass or Bandpass): 2 kHz to 20 kHz, +/-16 dB
Threshold Range: -20 dBu to +30 dBu
Ratio: 1:1 to 4:1
Attack Time: Fast (0.5 ms) to Slow (10 ms)
Release Time: Fast (30 ms) to Slow (500 ms)
Curve Type: Soft knee
-95 dBu (A-weighted)
-123 dBu (A-weighted)
10 Hz to 45 kHz, +/-1 dB
+28 dBu ( at 0.5%THD+N)
50 Ohms
(1) 12AT7A and (2) 6922
115 or 230 VAC / 100W
3.5 x 17 x 19" / 8.89 x 43.18 x 48.26cm
2U rack mount
22.75 lbs (10.32 kg)
673454001864
The PreSonus ADL 700 1-Channel High-Voltage Tube Channel Strip integrates a proven, award-winning, boutique-quality preamp; a custom-designed FET compressor; and a custom, four-band, semi-parametric EQ. The preamp employs a distinctive Class A, discrete design that incorporates two 6922 and one 12AT7 vacuum tubes per channel, operating with +/-300V power rails for maximum headroom and superb tone. The dual-transformer design ensures low-noise operation, with maximum common-mode rejection. This resulted in an ultra-quiet tube preamp with a big, warm, smooth, clear, distinctive sound.
Maximum Flexibility
Among the hallmark features of ADL-series preamps are separate, balanced XLR mic, balanced XLR line and 1/4" TS instrument inputs and a single, balanced XLR output. An Input Source Select switch enables you to leave your signal sources connected at all times and choose among sources, patching the selected input through the signal chain and completely bypassing the other two inputs. The preamp offers a choice of four mic-input impedances: 1500 Ohms , 900 Ohms , 300 Ohms and 150 Ohms . Lowering or raising the ADL 700 mic-input impedance can create subtle coloring and filtering effects, enabling you to get a wider variety of tonalities without using the EQ.
A Tight Squeeze
The ADL 700's FET (Field-Effect Transistor) compressor includes fully variable attack, release, threshold, ratio, makeup gain and bypass controls. The compressors of two ADL 700s can be stereo linked allowing for more accurate stereo imaging. The ADL 700 compressor has a "soft knee" compression curve. FET-based compressors such as the one in the ADL 700 use transistors to emulate a triode tube's operation and sound. This type of compressor generally provides a faster attack time and better repeatability than the optical compressors that are more commonly found in channel strips.
Custom-Designed EQ
The ADL 700's 4-band semi-parametric EQ was designed to match the preamp and compressor. It combines isolated filters and optimized, per-band Q to provide subtle signal-shaping without harsh artifacts. All bands have Gain (+/-16 dB) and Frequency controls, with overlapping frequency ranges and fixed Q (0.55). The low and high bands are switchable between shelving and peak.
The Trimmings
Of course, you get +48V phantom power, polarity inversion and a 20 dB pad, controlled by big, sturdy, military-grade switches. You also get a -12 dB/octave high-pass filter, the frequency threshold of which can be set at 20 Hz, 40 Hz, 80 Hz or 200 Hz-or it can be turned off completely. It's great for controlling room rumble and low-frequency noise.
Who's on First?
Would you rather have the compressor before the EQ in the signal chain or put the EQ first? Placing the compressor before the EQ allows you to make dramatic changes to the EQ settings without needing to alter the compressor setting. However, if you place the EQ before the compressor, you can better control different frequencies, achieving a more natural response. The ADL 700's EQ>Comp switch provides the best of both worlds, allowing you the flexibility to chose which signal flow is right for your application at any given time. You also can independently bypass the compressor and the EQ using front-panel switches.
Double Your Pleasure
With its extensive feature set, ultra-low noise (-100 dB S/N ratio), >73 dB gain, extended frequency response of 10 Hz to 45 kHz and top-of-the-line sound, the ADL 700 is a superb creative tool for serious recording engineers and musicians.