The Yamaha RX-V671 7.1-Channel Audio/Video Receiver offers many advanced home theater features including 6-in/1-out HDMI with 3D and Audio Return Channel compatibility, HD Audio, and SCENE function. Bring movies and music to life with 7.1 channels of pure surround sound. The RX-V671 adds the power of intelligent front presence effects to your multichannel audio. Combined with Yamaha’s advanced exclusive technologies such as CINEMA DSP and Adaptive Dynamic Range Control, you can enjoy the most immersive audio experience yet from your favorite entertainment. Use the included mic and Yamaha’s YPAO Optimization setup wizard to make setting up your 7.1-channel system easy.