Amazon.com: JBL Club WS1000 - 10” shallow mount subwoofer w/SSI™ (Selectable Smart Impedance) switch from 2 to 4 ohm, Black : Electronics
Amazon.com: DS18 PSW12.4S 12" Shallow Mount Subwoofer 1200 Watts Max Power 600 Watts RMS Single Voice Coil 4 OHMS Water Resistant - Best Sub for Tight Spaces in Car & Trucks - 1 Speaker : Electronics
TS-SW3001S2|S4 - 12" Shallow Mount Subwoofer with 1500 Watts Max. Power | Pioneer Electronics USA
JL Audio 13TW5v2-4 Shallow-mount 13.5" 4-ohm subwoofer at Crutchfield
Rockville W10T4-S2 10" Shallow Mount 1200 Watts Car Subwoofer, CEA Compliant, 2-Ohm
SML-Series 12" 500W Shallow Mount Subwoofer – Sundown Audio