Kicker 48CWRT674 CompRT Series shallow-mount 6-3/4" subwoofer with dual 4-ohm voice coils at Crutchfield
GHXAMP 150MM 6 inch Pure Subwoofer Speaker Unit 4ohm 60W Deep Bass Speakers Home Theater Car Loudspeaker Rubber Edge 1pc - Price history & Review | AliExpress Seller - Ghxamp Auido Store | Alitools.io
T 6 Subwoofer | Teufel
6.5" (165 mm) Red Carbon Fiber Woofer with Phase Plug