SVS PB-4000 (Black Ash) Powered subwoofer with app control at Crutchfield
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
Review: SVS SB-4000 – Subwoofer with DSP Control – Homecinema Magazine