Thanks for your final comments Dan.

I am about to pull the trigger for a Axiom 11.2 Syste, including 2 EP-800 subs.

I didn't find any graphics for EP800...

I only found a test for the EP600 here:
http://www.hometheatershack.com/forums/subwoofer-tests-archived/973-axiom-ep-600-2nd-test.html

But seems that the Harmonic distortion is too high and compression too. I am wondering if these problems will happen on the EP800?