I just need a basic starting point of where to start. I'm just trying to optimize my Onkyo-602 and see if I'm on the right track. How to use a decibel meter. I'm not sure was is meant by setting the surrounds at 75db and the sub at 80db. Such as what volume. The outputs from the 602 only go up to 12db I've read a ton of threads, and was given a site to Audioholics, but it wasn't very helpful. Any recommendations are appreciated. thank you