2 channel tracking and mastering compressor with 8 hand-matched Zener diodes

IGS Audio ZEN is ‘all you need to compress your mix’

ZEN is unique.

The construction is based on the legendary compressors used in Abbey Road Studios. It’s the musical canon of art used by The Beatles.

The ZEN Compressor audio circuit is based on 14 bi-polar transistors in each channel. The compression is achieved by 8 hand-matched Zener diodes biased by a perfect feedback circuit.



Basic features
All stepped manipulators: Yes
HPF: Yes, 60, 90, 120, 240Hz
Stereo Link: Yes
Hard wire bypass: Yes
Compression type: Zener diodes
Input & Output
Input Impedance (balanced): 10k Ohm
Output Impedance (balanced): 75 Ohm
Audio transformers: Yes, IGS Custom, on inputs and outputs
Operating Level: +4 dBu
Dynamic Range: >100dB
Noise Level: -99dBu
Max. gain: 36dB
Max Gain Reduction: -35dB
Time constants
Ratio: Variable, depends on the input settings, plus Limiter
Attack: 8 – 100 ms, x4 switchable
Release: 10 – 2000 ms, x4 switchable
Frequency response: 20 Hz – 20 kHz, +/- 0.1dB
Distortion (@ 20 Hz – 20 kHz)
Signal to Noise Ratio: >90dB
THD+N: >86dB
IMD (SMPTE): >90dB
Crosstalk: 80dB @ 1kHz
Front Panel
VU Meters: Yes, GR in dB’s, left & right,
Voltage: Selectable 115/230 VAC
Power consumption: <30 VAC
Power supply: Linear, internal
Packing box
Dimensions: 19″ unit
Shipping weight: 9 kg
Used for: Mastering, tracking

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