Av network receiver home cinema receiver loudspeaker configuration 51 output power per channel 80 watt total output power 6 x 80 watt output impedance 4 ohm speaker terminals compression clamp hdmi specification hdmi 20 analogue inputs 3 optical inputs 1 number of coaxial inputs 1 number of hdmi inputs 4 number of hdmi outputs 1 preamp output subwoofer x1 front connections headphone jack usb other connections ethernet aerial antenna dolby format