The Marantz SR4500 boasts 7.1 channel capability. Each of the 7 built-in amplifiers produces.Very neat and powerful in terms of sound quality and has a very heavy room shaking bass. You’ll enjoy Dolby Digital EX and DTS ES soundtracks thanks to 32-Bit processing. Other surround formats include Dolby Pro Logic IIx, dts Neo:6, and SRS Circle Surround II. Advanced 192kHz/24-Bit D/A converters mean you’ll hear everything with total accuracy. Connectivity? Extensive. There’s a battery of audio and video inputs and outputs. Full Composite to S-Video conversion, too, for optimal picture clarity. Want audiophile performance? Depend on Pure Direct and Video Off modes to help you listen further into the music. Other features include a unique Simple Setup so you can enjoy your system quickly and effortlessly. AM/FM tuner