Ok...i'm gonna sound like a major retard but here goes. I just made myself a new 15" Tempest sub, and I want to calibrate it with my HTD Level 3s. I have had the Avia dvd for some time, but I finally went to RS and bought the analog sound level meter. So.... I put the meter on a nice tripod and faced it straight up at the celing, and placed the tripod in my usual seating position. I turned the knob on the meter to the 80Db level and cranked out the pink noise from my left front...it started off reading like 70 so I kept turning up the volume on my receiver until it hit 85 (THIS WAS LOUD!!!). Then I turned the pink noise out of the center speaker and it was a bit lower that 85, more like 81. So should I go into my receiver's setup and turn up the center speaker 4Db, and check it again? Then repeat this process for the rears? And then I set about calibrating the sub, but it lost me completely...should I turn the gain up on the sub, or turn down the Db level on my receiver? etc?