Lot of Dolby DP571 Dolby E encoder - Powers on but Untested

PARTS! Dolby DP-564 ProLogic Multichannel Decoder (TESTED TO POWER ON)

Dolby DP572 Professional Dolby E Decoder Multichannel Audio Distribution system

Vintage Dolby Surround Decoder Unit Model SDU4

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

Vintage Dolby Laboratories CP50 Optical Sound Processor A1PM1590

Dolby DP569 Multichannel Digital Audio Encoder

Dolby DP571 Encoder AND DP572 Decoder Dolby E Set Lot Pair