Axiom Home Page Forums General Discussion Advice from Axiom Owners QS4's or QS8's?

I'm not a pro but just offhand, don't read into the specs so much. Your ear would be hard pressed to tell the difference between 5Hz in sound or 1db in sensitivity.
My understanding is that the QS8s sound virtually identical to the QS4s and that the main difference is the QS8s can play louder, hence are better for larger rooms.
With a 10x12 room, the QS4s should be way more than enough.
Just my 2 cents (canadian cents so take it for all its worth).
As for crossover, this is very listener dependant. I prefer my sub to handle a relatively low range only (65Hz or less) and to keep the musical low tones in the front speakers primarily (i have the M60s and an EP350).