Sony ES Series 5.1 Channel Surround Processor (1997). Dolby Digital (AC-3) and Pro Logic decoders, Digital Cinema Sound fields, 3 optical, coaxial, and AC-3 RF inputs, MPEG Multichannel. Requires an external power amplifier or active speakers to operate – a perfect addition to the ES Series system. Used models sell in Europe for approximately €230 https://www.hifishark.com/search?q=SDP-EP90ES From a private audio collection – carefully stored. The unit has not been tested – this is reflected in the starting price. Visual condition shown in photos. Only the unit itself is included. Follow our other auctions as well – we are selling an entire audio collection.