I did find this in the Articles on Axioms site about my THX question. I did find this in the Articles on Axioms site about my THX question. http://www.axiomaudio.com/archives/subsandsurrounds.html

7. If I do add the extra two speakers at the rear for a 7.1-channel system, should I use direct-radiating speakers like the M2i or M3ti or the quad polar QS8s or QS4s?
In a general way, it's best to use rear speakers that are identical to the surrounds at the sides, although there is some controversy about this. Using identical surrounds at the sides and rear guarantees the same tonal balance and dispersion traits from all four surround speakers. However, many Axiom system owners report excellent results using QS8 or multidirectional surrounds at the sides and two direct-radiating M2i's at the rear.

But there is still the sound quality comparison questions between the QS4 and QS8 speakers I am not sure about.

Last edited by marksanctuary; 07/04/07 04:36 PM.