Anyone have a list of the sub correction factors for the Rad Shack SPL meter. I knew it was off slightly but never thought it really made that much of a difference. Recently I had my car professionally measured. Of course I had my RS meter in hand too. Overall I was peaking at 117db~119db while the professional meter was 125db~128db . Once I get the values I really wanna go back and recalibrate my home system. So far I have used the reciever test tones, should I make a freq CD and set the sub based on a certain freq? Should I pick 35hz, play a custom cd w/ that tone, and set the level based on my RS meter w/ that exact correction factor added in? If it helps here's a lil info .... I have a Marantz SR-7000 and I think the crossover is fixed at 80hz. My sub is a Velodyne SPL-1200 w/ the internal crossover set at approx 55hz and down. My mains are Sound Dynamics RTS-9's set to small (dual 6.5's)(Another sister API company to Mirage and Energy). Center is also Sound Dynamics w/ dual 5.25"s set to small. Rears are Paradigm Mini-Monitors set to small. Any suggestions are appreciated !!!! Thanks in advance.