The front left and right pre-outs from my Yamaha 763 are connected to the aux input on my NAD stereo amp. This allows me to use the NAD amp to power the front left and right speakers in my 5.1 set up when using all speakers for 5.1 music or movies, but for stereo music I leave the Yamaha amp off and listen to stereo hi-fi as normal. The benefits? Only one set of front speakers for both top class stereo AND for 5.1...suits me fine to have 2 amps in my living room but less speakers (than if I had separate speakers for stereo hifi and 5.1 movies).