4 hole subwoofer box

Kicker 48PXA6001 Weatherproof Powersport Mono Amp & 10" 4 Ohm Premium Marine Subwoofer (Charcoal Grill )

Kicker Marine KPX500.1 Powersports Amp & 10" 4 Ohm ( White Grill )Subwoofer Audio Upgrade, Includes LED Remote

Cerwin-Vega RPM104FA - RPM 10" 4-Ohm Single Voice Coil Subwoofer for Free Air Applications

Kicker 52CVR104 - CVR10 CompVR 10-Inch (25cm) Subwoofer, DVC, 4-ohm w/ Speaker Wire Bundle

Wet Sounds REVO 10 FA S4 V3 - REVO Series 10" Free Air 4 Ohm V3 Subwoofer, Black and Wet Sounds REVO 10 SW-B GRILLE V3 - Black Salt Water Grille fo...

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

Kicker (2) 50CVX124 CompVX 12 Subwoofer, Dual Voice Coil, 4-Ohm, & 52GR12 Grill Bundle

Kicker Marine KPX500.1 Powersports Amp & 10" Free Air 4 Ohm Subwoofer Audio Upgrade

Kicker 48PXA6001 Weatherproof Powersport Mono Amp & 10" 4 Ohm Premium Marine Subwoofer (Charcoal Grill ) Includes LED Remote

Kicker 52CVR15 CompVR 15-Inch (380mm) Subwoofer, 4-Ohm DVC Bundle

Wet Sounds REVO 12 HP S4 V3 12" High Power 4 Ohm Subwoofer with REVO 12 XW-B GRILLE V3 - Black XW Style Closed Grille and PORTED-12-ENC 12" Rotomol...

Hifonics ELITE 8 Inch Shallow Mount Car Subwoofer, Dual 4 Ohm Voice Coil Speaker 500 Watt Peak Power Mobile Amplifier, Black/Blue

Kicker 48PXA6001 Weatherproof Powersport Mono Amp & (2) 10" 4 Ohm Premium Marine Subwoofer (Charcoal Grill ) Includes LED Remote

Kicker Marine KPX500.1 Powersports Amp & 10" Free Air 4 Ohm ( Charcoal Grill ) Subwoofer Audio Upgrade

Wet Sounds REVO 12 FA S4 V3 - REVO Series 12" Free Air 4 Ohm V3 Subwoofer, Black

MTX TERMINATOR 500-Watt RMS 2Ω Mono Block Class D Amplifier and Two MTX Audio 3512-04S 35-Series 12" 300W RMS 4-Ohm Shallow Mount Subwoofer

Wet Sounds Marine Zero Series White XZ Grill Boat Speaker Bundle (4) 8" & 10" Subwoofer, Center Console, Bay Boat Upgrade

Kicker (2) 51MWF124 - MWF 12-Inch Premium Marine Subwoofer (free-air) 4-ohm & 51KXMA15001 Marine Amp Bundle

Kicker 46L7T84 L7T L7-Thin 8" Subwoofer, Dual Voice Coil, 4-Ohm & 52GL78 Grill Bundle

Kicker Marine KPX500.1 Powersports Amp & (2) 10" 4 Ohm Premium Marine Free-Air Subwoofer (Charcoal Grill )

Kicker (2) 45L7R124 L7R 12" Subwoofer, Dual Voice Coil, 4-Ohm & 52GL712 Grill Bundle

PowerBass S-12TD - 12" Dual 4-Ohm Shallow Mount Subwoofer

Kicker Pontoon - Tritoon Boat Premium Audio Upgrade, (4) 8" LED Marine Speakers, 10" Subwoofer tube & KXMA 5Ch. Marine Amplifier Bundle

MTX TERMINATOR 1000-Watt RMS 1Ω Mono Block Class D Amplifier and Two MTX Audio 3510-04S 35-Series 10" 300W RMS 4-Ohm Shallow Mount Subwoofer