The Pro Channel II from ART is a channel strip featuring a second-generation discrete Class-A microphone preamp, followed by a compressor and a 4-band semi parametric EQ section.

The electronics of the preamp provide clean quiet gain while maintaining transparency. Analog and LED meters provide a detailed indication of audio levels.
The compressor is able to subtly control transients and noise on the most demanding sources, while the EQ offers wide tune-ability, and can be patched before or after the dynamics processor. Separate rear panel insert points allow patching in external signal processors immediately after the microphone preamp, and before the EQ and dynamics processor.

  • Variable input impedance for flexible microphone voicing
  • Selectable plate voltage
  • Large VU meters
  • Backlit function switches
  • Discrete Class-A input microphone preamplifier
  • Low noise at lower gain settings
  • Extremely low Total Harmonic Distortion (THD)
  • Wide frequency response
  • Additional front mounted instrument input jack
  • Supports Mid/Side mic'ing technique
  • Operates at +4 dBm/-10 dBv output
  • Selectable stereo/dual operation of output controls
  • Automatic instrument input selection

Number of Channels Single
Inputs 1 x 1/4" TS phone Instrument (front panel) 1 x XLR Microphone 1 x 1/4" TS phone Comp In (return) 1 x 1/4" TS phone EQ In (return)
Outputs 1 x XLR
1 x 1/4" TRS phone
Frequency Response 12 Hz to 100 kHz, +0,-1.0 dB
THD 1 kHz: < .015% typical
20 Hz to 20 kHz: < .033% typical
Noise EIN
Mic/Line: -128 dBu, input shorted, maximum gain, A-weighted
Instrument: -109 dBu, input shorted, maximum gain, A-weighted
Preamp
Gain Range Microphone: 70 dB (XLR to balanced output)
Instrument: 64 dB (1/4" to balanced output)
Input Impedance Microphone: 150 to 3.4kΩ, variable
Instrument: 2.5MΩ
Preamp Insert: 7. 5kΩ
Maximum Input Microphone: +18 dBu balanced
Instrument: +15 dBu
Output Impedance Balanced Output: 600Ω balanced
Unbalanced Output: 300Ω
Insert Outputs: 300Ω
Maximum Output Balanced: +24 dBu
Unbalanced: +20 dBu
Output Level @ Meter 0 VU:+4 dBu/-10 dBV
Phantom Power +48 V
Compressor
Threshold Range -20 dB to +20 dB
Ratio 2:1 to 30:1
Attack Time 250 µs to 100 ms
Release Time 100 ms to 3 s
Sidechain No
Equalizer
Frequency Bands Low: 40/120 Hz, selectable
Low-Mid: 20 Hz to 2 kHz, continuously variable
High-Mid: 200 Hz to 20 kHz, continuously variable
High: 6 kHz/18 kHz, selectable
Bandwidth Low- and High-Mid can be switched to Wide or Narrow
Range (Boost/Cut) +/-12 dB on each band
Physical
Power Requirements 105~125 VAC, 60 Hz
Dimensions (WxDxH) 19 x 9.2 x 3.5" (483 x 234 x 89 mm)
Weight 11 lb (5 kg)
Specialties Low-Cut Filter: 10 Hz to 250 Hz, 1-pole, 6 dB/octave

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