p12

Hey all, Recently fallen into the speaker rabbit hole and I've really gotten lost trying to narrow down which subwoofer to pick. Here's my current setup: B&W 620 Floorstanders (goes down to 58hz apparently) 3m x 4.5m x 2 (W,L,H) Room - Guess work here Denon x2300w Primary usage is a split...

I bought a used BK P12 300 SB DF about 3 months ago had a look inside but found no stuffing inside