Originally Posted by russ_777
It sounds like you're using a freight train to crack a walnut.
You would not be the first to make that observation. It's kind of my MO.
Why do you:
(1) have the two pairs of the speakers wired in series instead of running them off of separate amplifier channels?
I only had 7 powered channels. 2 mains, 2 surround, 2 rear surround and 1 center, plus a sub. There were no more channels in the amp.
(2) insist on using 25 year old technology and materials?
Newer is not always better. I'm very fond of my Polk SDAs and there is a method to my madness.
(3) think that more power will solve your problem (more power may simply drive the aged mechanical components of the Polks into breakup)?
More power is always the solution. Just ask Tim Allen.
But seriously volume requires power. Just no away around it. I'm going from a 700 ft^3 living room to a 16,000^3 living room. To get the same volume is going to require a lot more power.
As large as your space is my approach would be:
(1) get new (OK, 5 years old or newer) high efficiency speakers with high output capability, at least for the mains
(2) buy a high performance sub (or two) and cross it over at 80 Hz to take a big load off of the AVR's PAs (if you're not using one already)
Yes, that's half of what I'm doing. But high efficiency does not always equate to the best sound. (In fact in my experience is it rarely does.) I already have a sub, but it's totally inadequate for my situation. I'll be adding 2 new subs for the bass, and a lot more power.