18 inch subwoofer

Pyle 8 Inch 1600W DVC 4 Ohm Car Audio Subwoofer Speaker Set with 40 Oz Magnet and 1.5 Inch 4 Layer Voice Coil, Black (2 Pack)

MTX TNE212D Terminator 12 Inch 1200 Watt 2 Ohm Single Voice Coil Car Audio Dual Loaded Subwoofer Speaker Box Enclosure for Vehicle Sound System

QPower QBASS Dual 10 Inch Heavy Duty MDF Material Car Audio Subwoofer Enclosure Boxes with Shared Slot Port Vent and Dual Chamber Design, Charcoal

QPower QBOMB12VL 12 Inch Dual Vented Ported Car Subwoofer Sub Box Enclosure

Kicker 10 Inch Bass Bundle - A 44CWCD104 Subwoofer with CXA4001 and amp wire kit

QPower Quad 4 Hole 12 Inch Sealed Divided Speaker Box Subwoofer Enclosure

Kicker Q-Class Bundle - Two 42CWQ152 15" Dual 2-Ohm CompQ Subwoofers

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

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

MTX 12" 1200W Dual Loaded Car Subwoofer Audio w/ Sub Box & Amplifier (Open Box)

Q Power Single 12" Triangle Ported Car Audio Subwoofer Box Enclosure (2 Pack)

QPower QBOMB12TB Dual 12" Triangle Ported Car Audio Subwoofer Box Enclosure

Kicker Marine KPX500.1 Powersports Amp & (2) 12" Free Air 4 Ohm Subwoofer Audio Upgrade

2) MTX TN12-02 12" 400 Watt Car Audio Subwoofers + Ported Dual Box Enclosure

Kicker 53PL7TDF12 12" L7TDF Powered Down-Firing Subwoofer Enclosure with Amplifier Install Kit & KISL Integration – Thin Profile Loaded Truck Bass ...

Kicker Marine KPX500.1 Powersports Amp & (2) 8" CompRT DVC 2 Ohm. Subwoofer Audio Upgrade

Kicker (2) 53PL7TDF12 12" L7TDF Powered Down-Firing Subwoofer Enclosures with Dual Bass Remote Knob – Thin Profile Loaded Truck Bass System

Q-Power Single 10-Inch Universal Downfire/Behind Seat Subwoofer Sub Box (2 Pack)

Kicker Marine KPX500.1 Powersports Amp & 8" CompRT DVC 2 Ohm. Subwoofer Audio Upgrade

MTX TERMINATOR 500-Watt RMS 2Ω Mono Block Class D Amplifier and Two MTX Audio TN12-04 Terminator 12" 200W RMS 4-Ohm Subwoofer

Kicker Marine KPX500.1 Powersports Amp & (2) 12" 4 Ohm ( White Grill ) Subwoofer Audio Upgrade

Kicker Marine KPX500.1 Powersports Amp & (2) 10" Free Air 4 Ohm Subwoofer Audio Upgrade

Kicker 51KJPL7T122 L7T 12" 2-Ohm Custom Fit Subwoofer Enclosure with 48PXA600.1 Waterproof Mono Amplifier for 2007-2018 Jeep Wrangler JK

Kicker Marine KPX500.1 Powersports Amp & 10" CompRT DVC 4 Ohm. Subwoofer Audio Upgrade