Denon Avr3000 . It's an AV receiver but I run it 2 channel with 2 pairs. This thing is awesome, even compared to my 2270 I sold recently. I read a review
DENON AVC-3000/AVC-3000G Specifications Denon / Den On
Denon AVR 3000 5.1 Channel Receiver for sale online | eBay
Denon AVR-3000 AV Surround Receiver Manual | HiFi Engine