Harman Kardon AVR330 7.1-Channel A/V Receiver (Gray/Black) (Discontinued by Manufacturer) 55 watts per channel in stereo mode. Dolby Digital, Dolby Digital EX, DTS, DTS-ES Discrete and Matrix. 7 channels of high-current amplification with 2 channels for either surround-back. Coaxial/optical digital ins/outs, A/V ins/outs, 6/8-channel direct inputs.