Have a PSW 110 hooked up with a subwoofer RCA cable from LFE IN on sub to Subwoofer PreOut on Pioneer VSX-03TXH. Phase control set at "0", Low Pass set @ 160 on sub. Subwoofer turned on in Pio AVR with crossovers set at 80Hz for front, center, and rear speakers. Every time I turn the power on to watch TV, Bluray, etc. sub makes low rumbling noise / pop and power button turns from green to red on the back of the subwoofer. Changed to different RCA sub cable and still does not work properly. Any help?