I'm AVR shopping. There is little price difference between most manufacturers' "best" 5.1 channel receiver and their "least expensive" 7.1. Assuming that a 5.1 and 7.1 receiver are both rated 100 watts-per-channel, and if I plan to use three and only three channels, will the larger power supply of a 7.1 receiver provide more current than the 5.1?
I understand that as more channels are driven, the effective power output per channel drops (this is why the manufacturers so rarely rate their receivers with all channels simultaneously driven). I've never specifically read this, but it would seem that the power supply would be the effective limitation on output. Therefore, in theory, the larger power supply of the 7.1 receiver would provide more current to the three active channels than the smaller supply of the 5.1.
Also, assuming that all other factors are equal, is it worth the extra money to buy the least-expensive receiver rated for 20-20K power output rather then the most expensive one rated at 1KHz?
Thanks - Boomzilla