The Yamaha A-S501 Stereo Amp & Diamond 9.1 Hi-Fi Package is a comprehensive so...The Yamaha A-S501 Stereo Amp & Diamond 9.1 Hi-Fi Package is a comprehensive solution for both audiophiles and those looking to elevate their home entertainment. It seamlessly blends the Yamaha A-S501 Stereo Amplifier with its added digital input for...more