I have ran the avia disc, calibrated, and used the spl meter. When I run the 6 point and 5 point low frequency sweep test, I am getting a 4-6 dbl. dip on my meter. My sub has no phase switch either. Just the crossover and volume knobs. Then the auto standby switch in the back. So when I calibrate using the normal avia tones, I cant hear the left speaker during playback. But I get a really good surround field on the right side. It is like the left is non-existent. My distances are correct on all my speakers, as my delay settings. Whats the deal???