SVS PB-4000 DO YOU REALLY NEED DUAL SUBWOOFERS?!? - YouTube
SVS on Twitter: "Biggest SVS event ever at @nfmtweets tonight! Getting the dual PB-4000 subwoofer & Prime Speaker system warmed up. https://t.co/141vOAVJIF" / Twitter
SVS PB-4000 Subwoofer – Dreamedia AV
SVS PB-4000 (Black Ash) Powered subwoofer with app control at Crutchfield