It is a 2RU rackmount audio compressor with extensive parameter settings.
It was built in the USA in 1991 by DUKANE.
It uses (state of the art for the time period) ANALOG DEVICES SSM2120 and SSM2013 Dynamics Processor / VCA chips
Upgraded power supply and audio circuit capacitors
Certain OpAmps upgraded to LM4562NA precision audio-grade devices
THRESHOLD variable from 27mV to 7.5V (the input range is about -30dB to +17dB)
ATTACK variable from .2mS to 10mS
RELEASE variable from .5sec to infinity (very creative possibilities)
COMPRESSION RATIO variable from 1:1 (no compression) to infinity:1 (extreme limiting)
This serviced/upgraded compressor is capable of accurate and precise dynamic control, or for audible pumping/breathing compression effects.
I have also installed a Vintage ALTEC 15015A Input Transformer and a Vintage McCurdy (Hammond made) Output Transformer, for isolation and inherent vintage colouration.
The Altec Transformer is mounted in a Micalex socket.
$180 firm
please reply with name and number. thx, S.Whitby