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Do you have anyway to measure the frequency response yourself to validate it?

XT32 has much more than more microphone positions, it has far better EQ power than the other versions. Pro will not turn XT into XT32. But Pro does give you a custom curve editor and the ability to turn off mid range compensation. Most people seem to recommend upgrading to a receiver with...

And my opinion of the real world in my room is the opposite. :D Adding a second subwoofer was one the of best things done to my system, along with wall treatments and using Audyssey.

Yep, agree with everything you said. I guess my main point is the stuff Don was bringing up did not seem to be correct or accurate and I think you hit on most of those things in your other post. Thanks

Ok, thanks but I still have never heard of such a thing as "frequency doubling". :) If the 2nd harmonic is sourced from the speaker/sub, especially at the same volume as the original tone I would say you have a bad subwoofer. Sure, play a 50hz tone outside vs in your room and you may see...

Don, I have never heard people refer to 'frequency doubling'? Are you simply referring to harmonics or are you talking about room peaks and nulls?

Yes I agree. But when you have full range speakers with output to 50hz that is contradicting itself. :) Full range would be down to 20hz. That being said, I have system similar to yours with mains then have quality output into the low 40hz range. I still cross them over at 80hz and run two...

I'd say you should hear the frequencies the sub is producing, but not be able to localize them or know they are coming from the sub. Subs should blend with the other speakers such that you don't even know you have subs, it sounds as though bass is coming from your other speakers.

Multiple subs are used to flatten the frequency response over a larger area. If that is your goal get another sub identical to your existing one. If you go with two of those 8 inch subs you will lose the output you currently have in the 24hz to 36hz range. So to me you are taking a step...