SVS PB-4000 (Black Ash) Powered subwoofer with app control at Crutchfield
SVS - UK site AVForums brought an SVS PB-4000 subwoofer in... | Facebook
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 Ported Subwoofer Review | Audioholics
SVS PB-4000 Subwoofer Measurements and Analysis | Audioholics
SVS PB-4000 (Black Ash) Powered subwoofer with app control at Crutchfield