• Input: 10 k ohms Bridging & Transformer balanced Gain nominally 0 dB with +/- 2 dB Gain Variation with rear panel control.
  • Output: Transformer balanced 80 ohms Max output +26dBm
  • Frequency Response: +/- 0.5 dB 20 Hz to 20 kHz.
  • Noise: > 75 dB (no Gain Make up) 20 Hz to 20 kHz
  • Distortion: 0.05% at 1KHz and +9 dB (comp & Limiter switched out)


This is a pair of the Shep single Class A Fully discrete Limiter Compressors, packaged into a 2 U high package and complete with a Mains power supply. It has a de-ess switch with two settings. It can be used as two single channel compressors or linked using the Stereo linking Toggle switch to control a Stereo signal.

The power supply is switch selectable for use on 220/240 or 120 volts ac

A by-pass relay connects the I/P and O/P XLR's together in the case of a power failure or when the unit is switched off.

It is suitable for Sound Broadcasting and Recording Studios.

It has characteristics which are very similar to the Neve 2254 Compressor Limiter


Limit Threshold, switched attenuator + 4dB to +12 dB in 1 dB steps.

Limit Recovery, switchable 100 mS, 200 mS, 800 mS, Auto (In the Auto position the recovery time varies according to the rate of Variation of the levels of the incoming programme )

Toggle switch for Fast and Slow attack times. 100 uS / 1 mS

Compression Threshold, switched in 3 dB steps, -21 dB to + 12 dB

Compressor Recovery Time, switchable 400 mS, 800 mS, 1.5 secs, Auto (Auto = 50 mS / 5 secs.)

Compression Ratio, switchable 1.5, 2.1, 3.1, 4.1, 6.1

Gain Makeup, 0 dB to 20 dB of extra gain when Compress is selected.(continuously variable)

De - ess Toggle with two levels of de - ess

Limit in / out Toggle

Compress 1n /out Toggle

By-pass Toggle

Stereo / Quad Linking Toggle

Meter Reads, Input, Output or Gain Reduction selected by Toggle switch

Front View

Back View