Symetrix 301 Low Distortion Compressor/Limiter (NO AC adaptor)

dbx Compressor Limiter Gate Processor (266XS) (Tested)

Behringer Composer MDX2000 Dual Channel Compressor Limiter Gate Rack UNTESTED

Behringer Composer Pro MDX 2200 Expander / Gate / Compressor / Limiter

Alesis 3630 Dual-Channel Compressor / Limiter with Gate

Alesis 3630 Compressor RMS/Peak Dual Channel Compressor Limiter with Gate

DBX 266XL COMPRESSOR/GATE PRO-AUDIO 1U RACK UNIT - 1 channel works

Behringer COMPOSER PRO Pro MDX2200 Dual Channel Compressor Limiter Rack Unit