SVS Sound 3000 In-wall Subwoofer System - Dual 9" Subwoofer – Dreamedia AV
KEF Ci3160RLb-THX EACH In-Wall Subwoofer | Accessories4less
SVS 3000 In-wall Single Subwoofer System In-wall enclosure with dual subwoofers and amplifier at Crutchfield
Monolith M-iwsub8 8in In-wall Subwoofer | Passive, Paintable Grille, Easy Install, Adds Powerful Bass To In Wall Or In Ceiling Home Theater System : Target
SSW-4 | Dual 8” (200mm) In-wall Passive Subwoofer
Monolith by Monoprice M-IWSUB82 Dual 8in In-Wall Subwoofer - Monoprice.com