Symetrix 421 AGC Leveler/Downward Expander Rackmount Processor - Untested

SYMETRIX 322 DIGITAL DYNAMICS DSP PROCESSOR With Power Cord (1)

Symetrix 528 Voice Processor - Original grayface - Channel Strip

Symetrix 421m AGC-Leveler Microphone Preamp Limiter Expander 70V Broadcast 1U

Symetrix 422 Stereo AGC Leveler Compressor Broadcast Rack Processor Working

Symetrix 322 DSP Engine Audio Processor Untested

Symetrix 528 Voice Processor - Vintage grey -Tested - Works great!

DIGITECH DSP 256 XL MULTI EFFECTS PROCESSOR (Needs Battery) Turns On See Pics