I am a newcomer to home theater. I have a Kenwood 6.1 receiver with Athena Technologies Audition speakers and a D-Box 302 subwoofer. My receiver's volume ranges from -92db to -8(loudest) and I can adjust the level for each speaker between +10 and -10. I calibrated my speakers using the Ultimate DVD Platinum test disc. I used -18db as the volume on the receiver for calibration. I used 75db as my reference level. At 75db, all my speakers, except the subwoofer ranged in level from -3 to -6. However, even bumping the subwoofer level up to +7, I could only get it to reach about 62db. At that volume, it was literally shaking the house. The DVD calibration disc recommends that I set the subwoofer's volume at 50%. My question is, am I doing something wrong in my calibration? Is there some reason why I can't get my subwoofer to get to 75db?(for the calibration, I placed the subwoofer in a corner). Any help would be really appreciated!