My reciever (onkyo 898) has a audio calibration setup, which has a noise for adjustments. When I calibrate with the receiver's level and then play with the Avia disc the levels don't match up. Setup, using noise from reciever, calibrate each speaker to give 82db. FL - 82 FC - 82 FR - 82 SR - 82 SC - 82 SL - 82 Put in Avia play channel calibration sounds and front speakers all basically match up, but rear channels don't left and right rear don't even match each other. Both surround channels are lower than the front levels. Avia results: FL - 72 FC - 74 FR - 72 SR - 74 SL - 71 Why/how could this be? I would think that a reference tone for both would be the same, but it's not. I'm not saying that the tone on the reciever at 80db should also be 80db from a dvd when the reciever is at the same volume, but the level should be at the same relative level, no? And which method should I use to do the calibration? Is one better than the other, the both aren't the same, that's obvious.