Dolby AC-2 DP502 Digital Audio Decoder - Rack Equipment

Lexicon CP-2 Digital Audio Surround Dolby Pro-Logic Processor

Dolby DP562 Multichannel Audio Decoder Professional Rack Mount Unit

Vintage Dolby Surround Decoder Unit Model SDU4

Dolby DP524 Digital Audio Decoder Rackmount AES/EBU SPDIF Pro Broadcast

Yamaha DDP-1 Digital Sound Processor SURROUND SOUND DECODER Lights Up UnTested!

DOLBY Laboratories DA20 Digital Film sound processor

Yamaha DDP-1 Natural Sound Digital Processor Dolby AC-3 Surround Decoder Japan