Originally Posted by sinistersix
Well it seems these days I can just buy a 5.1 theater receiver for very cheap...199-250, where some 4 channel amps are more than that. If I have four 8 0hm speakers, I can run two per channel as long as the amp is 4 ohm stable correct? I see many amps that are 2 channels and have 4 ohm power output, but very few 4 channel amps these days
Yes you can do that, but then you lose independent control of each room. That may not be an issue for you by the sound of it so you'd be good to go.
If you run 2 speakers on one channel, the effective ohms seen at the receiver would depend on how you wire the speakers. In series, the ohms would add up, and in parallel they would be 4 ohms. Why not just run 1 speaker per channel if possible? On an entry level receiver( any current receiver that only has 5 channels would be the lowest priced models) the amp sections are pretty basic and they might not recommend 4 ohm loads at all. The amp might heat up frequently unless you play at lower volume levels. Just a thought.