Thanks for the equation forgot about pi.
I understand the figures in the chart for 1 speaker perfectly thanks to the equation from KTMrida4life but the I'm not sure how he got the figures for X Speaker multiples. basically what part of the equation changes when you add multiple speakers because the figures I just came up with for 2 8s or 15s, or any combination of speakers for that matter, are a long cry from what on the chart (except for the one speaker part).
Sorry KTMrida4life for getting //content.invisioncic.com/y282845/emoticons/ot.gif.1ccdea14db89b4c1e3b73336d794b1d2.gif