No sound from PSW 12

Drack
Drack Posts: 1
Looking for help regarding a PSW 12 sub. On initial hookup sounded like it was working fine, but after 1 or 2 plays, no sound is coming out. Tied to an Onkyo TX SR702 receiver from Pre-out Subwoofer output to LFE unfiltered input on the sub; hope I didn't damage it somehow. Any ideas?