Single-channel 500 Series version of the DAV BG4 with continuously variable ratio and, release time, Side-chain HPF and Stereo Link connector.

Decca Heritage compressor/limiter, based on the classic BG4.
Low noise and distortion [Decca 1977 circuit brought up to date]
Recovery time switched, 3secs and 0.3secs
Threshold calibrated in dBu ref. output level
LED metering Stereo couple
Limiter/compress On/off switch
Overall low noise and distortion
Input gain control to +20dB