I am trying to get my sub calibrated but do not have AVIA. I have a copy of DVE but apparently the sub test tones are not very accurate to say the least. I was hoping someone could help me out on this one. O.K. heres what tools I have to work with on this problem. I have a SPL meter, DVE, Real Traps Test Tones CD(1hz increments). What I tried last was this. I set my mains to large, disabled sub and tested response with a inintial spl of 75db at 60hz. They stayed pretty flat from 100hz down to about 35hz with a 12 db spike around 80hz. I then unhooked mains, enabled sub and set it set it at 75db with the 60hz tone. The sub wasnt as flat as the mains but had good response down to about 28hz with a big spike at 80hz as well. I then hooked everything up, crossed sub over at 80hz and it was pretty flat from 28 - 120 hz with the 80hz spike being the exception. So the questions are: 1. Is there a better way to do it? 2. My mains go pretty low and the sub isnt really helping them much but my center and surrounds cant go that low. I have the ability to cross each over seperatly. Is it better to set the crossover on the mains at 40hz and the surrounds/center at 80hz or just cross them all over at 80hz. 3. With the exception of the spike at 80hz the mains are really flat, should I leave them like they are or try to move them farther away from wall to reduce bass coming from them to get rid of the spike at 80hz. 4. Seeing as how I have a big spike at 80hz should I try to avoid this as a crossover point? Sorry for the long post but any help would be appreciated.