Polk PSW505 Hissing Sound inside Amp. What is this part? H01195A

Hey guys and gals,

I've had 2 of these subs for a while and my 2nd which is only turned on whenever i need a little more rumble started to make this hissing sound when silent, no signal, and even with LFE unplugged... I popped the back off and it's coming from the coil marked H01195A. I'll call POLK on monday, but figured i'm post here and ask if ya'll know what component this is. Transformer?
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