I just received my first subwoofer ever today and I'm very excited to get it to the right level. I have the Denon 4800 and when I use the test tone for the sub it is some very low rumbling and the needle on the meter is moving all around. I can't get it to give an accurate reading like the other speakers. Do I just get it close and call it good or is there a certain way to do it. Where I have it set now seems pretty low(volume) but was reading around 80db(have other speakers set at 75db). Was I getting a poor reading and how else can I do it. Please help Pete By the way its a HSU VTF-2 and if anybody else has one please tell me your settings you found to be the best. I am new to all this and the polarity and crossover in and out, where to put the foam plug etc.