BASS-SOFA" (1000 WATTS !!!) Transformation of a Sofa into a Subwoofer! - YouTube
Really thin under couch subwoofer | Audioholics Home Theater Forums
Test: Nubert nuSub XW-800 slim - Der Überall-Subwoofer
CP8 Couch Potato - Earthquake Sound Corp.
Beratung für Sofa-Sub erbeten, Subwoofer - HIFI-FORUM
Earthquake Sound Sleekwave CP-8 Home Cinema Subwoofer, Ideal As Under the Sofa Subwoofer or Hidden Subwoofer for Home Cinema - Black : Amazon.co.uk: Electronics & Photo