"If voices are that difficult to hear coming out of the centre channel you should check to see if all drivers are operational as well."

Good call. We got one bad QS8 driver and his EP800 was DOA so the QA wasn't too good.

Center crossover is 80hz. Mains are 60hz. I didn't do the calibration. He had some local guy do the measurements and setup. I went in later with a handheld meter and some test tones and it measured pretty flat to about 20 Hz where the SVS fell off like a rock.