That is a big room. Are your couches really 20' from the TV?
Do you have a bbig screen tv or do you use opera glasses.
You're going to be using a little more than 1 watt to get to 85db at the listening position.
Yes, the couches are really that far away. I have a 65" TV, which looks huge up close, but sitting in the couches, it looks "normal". We used to have a 50" TV, and that practically required opera glasses.
I just received a QSC RMX 2450 power amplifier. At 4 ohms, this thing puts out 650 watts per channel, so, should I go with the M80s, I should be okay in terms of power.
The room really kind of sucks---all that space, yet, an awkward layout, so there's really only one visually acceptable place to put the TV and speakers. The place is a rental, so we can't make any major modifications. But if I owned it, I would extend that stair wall (lower left on the drawing) out a bit. Then I could place the TV directly across from the east wall (rather than in that south-west corner). That would also allow me to place the speakers farther apart.
