Are you using the Manual Test tones in the Receiver menu's? Maybe your meter is messed up. I like to verify my Denon's 2805 auto setup by going into the Speaker section and manually cycle through each speaker with the spl meter in the main seat position to get all speakers to 75dB's. With both my ep500 and now ep600 I have the volume level about 7 o'clock and the receiver's sub level on 0dB. If I raise the sub volume, I have to lower the receiver to stay at 75dB, and vice versa.
How big is your room? What do you have the trim level set on, flat, half, etc...? A corner position WILL give you the most over all bass and excite most room locations, however, sometimes it can result in to much boooooooom.
