Almost positive that is it. Turn it down, and see if the problem goes away. BTW, what type of amp/woofer?
Scott


Scott Mabe I WILL be Phil. 1999 Contour SVT, Tropic Green BAT kit, K&N RU-3530+MAF, Magnecore 8.5mm, some audio goodies, Hightowers, Knauberized, tatoo by Parkedcar.