I have a psw 150 subwoofer. when I hook this up to the wall without hooking up the rca plugs it clicks and buzzes. I have hooked up a cd player to it and sound will come out of it,as soon as I try and turn it up. it will click and buzz.i have disassembled it and speaker is in execellent shape. the fuse is not blown. could someone please help me solve this issue?