Vintage Audio Source Model SS Two Surround Sound Processor .

Rotel Surround Sound Processor RSP-980

Technics SH-AC500D Digital Surround Processor - No Remote

Onkyo ES-600PRO Dolby Surround Processor Vintage , 3Channel, Great Sound!

Kenwood SS-992 AV Surround Processor - tested

Rotel RDA-975 Digital 5.1 Ch Surround Adapter & Processor Works! Includes cable!

Vintage Fosgate FOUR Audionics Digital Servo Logic Surround Sound Processor

JBL ESC200 Amplifier Surround Sound Processor Compact Amp Not Tested