This is a response to member WADER2K question
According to Yamaha they recommend using the 7ch stereo program to output sound from all speakers.It doesn't matter if you have a 5.1 speaker set up. the unit mixes down the source to 2 channels, and then outputs equal sound from all 5 speakers. It's suppost to create a larger sound field. I have this Yamaha RX-V673 connected to the Energy take classic 5.1 speaker system and what i have experienced is it creates a full equal sound from all 5 speakers which also creates a higher db sound in the room. It does not create a 7.1 surround sound effect. I have owned this set up for about 6 weeks now and have been really doing alot of trial and error in setting up this receiver and speaker set up. When i first bought this combo i wasn't very happy with it for Music playback in any sound mode, but have now got it to sound pretty darn good. Movies have always sounded great right from the start. I also tried the Polk TL250's set with a Polk PSW111 sub with this receiver but had problems with one of the Polk TL250 satellites so i didn't get to play with it much with that speaker set up. I think i will try the KEF KHT2005.3 system or Orb's peoples choice next.
Living room; Samsung UN55F7100 3D LED, Marantz SR5008, Oppo BDP-103, Definitive Mytho 2's fronts, Definitive Pro Center 1000, Definitive Di 5.5R in ceilings, SVS SB-1000 subwoofer, Comcast DVR HD box.
Garage; Sherwood RX-4105 2 channel stereo receiver, Samsung DVD-C500 CD player, Klipsch KG 2.5 med oak speakers