18 inch subwoofer cabinets

Kicker 48PXA6001 Weatherproof Powersport Mono Amp & (2) 10" 4 Ohm Free-Air Marine Subwoofer ( Charcoal Grill )

Wet Sounds REVO 10 FA S4 V3 - REVO Series 10" Free Air 4 Ohm V3 Subwoofer, Black and Wet Sounds REVO 10 XW-W GRILLE V3 - White XW Style Closed Gril...

Memphis Audio SRX300.1V Mono 2-Ohm 300 Watt with SRX1040V 10" Street Reference Single 4-Ohm Subwoofer

Wet Sounds REVO 10 HP S4 V3 - REVO Series 10" High Power 4 Ohm V3 Subwoofer, Black and Wet Sounds REVO 10 ADP XZ-W Grille Kit 10” Revo Sub Grille K...

Wet Sounds REVO 12 FA S2 V3 - REVO Series 12" Free Air 2 Ohm V3 Subwoofer, Black and Wet Sounds REVO 12 XS-W-SS GRILLE V3 - White & Stainless XS st...

Kicker Marine KPX500.1 Powersports Amp & 8" TB Loaded Enclosure 4 Ohm Subwoofer Audio Upgrade

Wet Sounds REVO 12 FA S2 V3 - REVO Series 12" Free Air 2 Ohm V3 Subwoofer, Black and Wet Sounds REVO 12 ADP XZ-B Grille Kit 12” Revo Sub Grille Kit...

Wet Sounds REVO 10 FA S4 V3 - REVO Series 10" Free Air 4 Ohm V3 Subwoofer, Black and Wet Sounds REVO 10 ADP XZ-B Grille Kit 10” Revo Sub Grille Kit...

Kicker 48PXA6001 Weatherproof Powersport Mono Amp & 10" 2 Ohm Free-Air Marine Subwoofer ( Charcoal Grill )

Wet Sounds REVO 10 HP S4 V3 - REVO Series 10" High Power 4 Ohm V3 Subwoofer, Black and Wet Sounds REVO 10 FA SW-W GRILLE V3 - White Salt Water Gril...

Wet Sounds REVO 10 FA S4 V3 - REVO Series 10" Free Air 4 Ohm V3 Subwoofer, Black and Wet Sounds REVO 10 XW-B GRILLE V3 - Black XW Style Closed Gril...

Wet Sounds REVO 10 FA S4 V3 - REVO Series 10" Free Air 4 Ohm V3 Subwoofer, Black and Wet Sounds REVO 10 XS-W-SS GRILLE V3 - White & Stainless XS St...

Cerwin Vega H7124D HED 12-inch Dual 4-Ohm Voice Coil Subwoofer

Cerwin Vega H7104D HED 10-inch Dual 4-Ohm Voice Coil Subwoofer

PowerBass 3XL-810D - 8" Dual 1-Ohm VC 500Wrms / 750Wmax Subwoofer

Boss Phantom 12 Inch 2300 Watt Max Power Car Audio Subwoofer with DVC Power

KICKER 52L7XS151 - 15 Inch SoloXS L7XS 1 Ohm DVC Square Subwoofer with 1500 to 3000 Watts RMS, 43mm Xmax, Forced Air Cooling, and Field Replaceable...

MTX 12" 1200W Max Car Audio Dual Loaded Subwoofer Set with Car Audio Amplifier

Memphis Audio PRX624 Power Reference Series 6-1/2" Selectable 4 or 2 Ohm Component Subwoofer

KICKER 52L7XS121 - 12" SoloXS L7XS 1 Ohm DVC Square Subwoofer with 1500-3000W RMS, 43mm Xmax, Forced Air Cooling, and Field-Replaceable Recone System

QPower QBOMB, Single 10" Tough Vented Shallow Ported Car Audio Subwoofer Box Enclosure with 1.4 Cubic Feet of Air Space, Black

KICKER 52L7XS152 - 15 Inch SoloXS L7XS 2 Ohm DVC Square Subwoofer with 1500 to 3000 Watts RMS, 43mm Xmax, Forced Air Cooling, and Field Replaceable...

Memphis SRXE12SA 12" SRX Series Powered 300-Watt Vented Subwoofer

Kicker Marine KPX500.1 Powersports Amp & 10" Free Air 2 Ohm ( Charcoal Grill ) Subwoofer Audio Upgrade