I recently used the test tones in Avia + a Radio Shack SPL meter to tweak my 5.1 DD/DTS setup. It did a VERY good job of balancing all the main speakers and made me realize that I had the surround speakers WAY to high and the LF and RF speakers a little too low. The sub setup was a different story. When I used the tones to balance the sub what resulted was absolutely no bass at all during movie playback. I knew I originally had too much bass in the system...sub volume turned all the way up, reciever bass management on +3dB. After Avia my settings were, sub volume on about 30%, receiver +2dB. With these settings, the balance was just about perfect according to the sound meter. I popped in Saving Private Ryan (DTS) and played the first beach scene which has tons of explosions and there was no bass to be had. I left the reciever settings where they were and started to turn up the sub volume until the house was a rockin' again. I ended up with a sub volume of about 75%...way above where Avia said it should be. Anyone have similar experiences?