Well, I finally went to RS and bought the SPL meter everyone says we MUST have.... Anyways, let me tell you what I did and you can tell me if I need to do any more. Set the meter to c & slow. set it too 80 db and played my receivers test tones. Pretty much got all the speakers in the -5 range (which should put it at 75db correct?) My sub was up around 0 on the 80 db scale. Is this all I have to do, I dont have any test discs. Just a side note. Boy how my ears decieve me. I wasnt even close in setting those speakers before the spl meter, got to test it with "the fast & the furious" What an improvment. Dont know if was worth 40 bucks I spent, but I guess if i wanted to be mr. cheap-o I could take it back :p) EDIT: let me rephrase. It was well worth the 40 bucks but if I only get to use it once.......... i dont plan on changing much- YET.