I was wondering about is how to accurately set my subsonic and low pass filters. I know that the ss is supposed to be like 5-10 below the frequency of my box but not so sure about the lp. The knobs for both of these are numbered only for high and low but no where in between so I'm not sure how to set it to the exact number. this is what I mean... http://www.mtx.com/caraudio/products/manualsQuickInstall/amps/XT_600XD_300XD_InstallSheet.pdf
