ported under seat subwoofer box

Q Power 4 Hole 12" Sealed Divided Subwoofer Box & 12" 1800W Subwoofer (4 Pack)

Pyramid BNPS102 10" 1000W Car Subwoofers Sub Box and 2000W 2-Ohm 2-Channel Amp

Memphis 2 15-PRX10D4W PRX Series 10" Dual 4-ohm Subwoofers and a Sealed Box

VEVOR 8" 300W Underseat Car Subwoofer, Slim Powered Car Subwoofers Under the Seat, Low Profile Audio Sub Built-in Amplifier, Black

VEVOR 10" 240W Underseat Car Subwoofer, Slim Powered Car Subwoofers Under the Seat, Low Profile Audio Sub Built-in Amplifier, Black

VEVOR 10" 400W Underseat Car Subwoofer, Slim Powered Car Subwoofers Under the Seat, Low Profile Audio Sub Built-in Amplifier, Black

Q Power Car Audio Subwoofer Enclosure Box Chuchero For 8" Mids and 3" Tweeters

Hertz HMS 12 S4-LD-G 12" Marine Subwoofer with Venezia V1 Monoblock Subwoofer Marine Amplifier and Remote Knob

QPower QBASS Dual Vented 12 Inch Heavy Duty MDF Material Single Car Audio Subwoofer Enclosure Box with 2 Vents for Better Heat Management, Charcoal

MTX Car Audio

QPower QBASS Dual 10 Inch Heavy Duty Car Audio Subwoofer Enclosure Box, Charcoal

QPower 12 Inch Heavy-Duty Dual Sealed Carpet Covered Durable Car Audio Vehicle Subwoofer Enclosure Woofer Box, Charcoal Gray

Hifonics HFX12D4 12 Inch Subwoofer, 800 Watt Max 400 Watt RMS Single Speaker for Car & Powersports Vehicles, 1 Pair

QPower 15 Inch Heavy Duty Single Vented Carpet Covered Durable Car Audio Extra Large Vehicle Subwoofer Enclosure Woofer Box, Charcoal Gray

QPower 10 Inch Heavy-Duty Single Vented Carpet Covered Durable Car Audio Vehicle Subwoofer Enclosure Woofer Box, Charcoal Gray

Q-Power Shallow Single 12 Inch Heavy Duty Sealed MDF Material Truck Audio Subwoofer Enclosure Box with Durable Carpeted Exterior, Charcoal Gray

QPower QBOMB8V Dual 8 Inch Vented Port Subwoofer Sub Box with Bedliner Spray

QPower QBOMB12V Dual 12" Vented Ported Subwoofer Sub Box with Bedliner Spray

QPower QBOMB15VL Single 15" Vented Ported Car Subwoofer Sub Box Enclosure QBOMB

MB Quart DS1-204 8 Inch 400 Watt MAX 200 Watt RMS 4 Ohm Dual Voice Coil, Shallow Slim Subwoofer Speaker Pair for Car Audio Sound System

High Power 8" Midrange Driver for Audio Performance with 360W Peak Power, 180W RMS, 8 Ohm Impedance, Paper Cone

Pyle PLPW12D 12" 3200W 4-Ohm DVC Car Subwoofer Sub and Dual Ported Enclosure

QPower Dual 12-Inch Heavy Duty Ported Car Audio Subwoofer Box - Deep Bass MDF Enclosure with Charcoal Carpet Finish, 1.6 Cu Ft Air Space Per Chamber

MTX AUDIO RT8PT 8 Inch 240 Watt Car Loaded Universal Powered High Performance Amplified Tube Box Vented Subwoofer Enclosure, RCA Connectivity

Q Power QBomb Single 12 Inch Vented Subwoofer Sub Box with Black Bedliner Spray

QPower Dodge Ram Quad Cab '02-Newer Dual 12 Inch Subwoofer Box Sub Enclosure

Planet Audio AC12D 1800 Watts 4 Ohm Dual Voice Coil Car Audio Subwoofer

QPower HD112VL Single 12 Inch SPL XL Heavy Duty Side Ported Subwoofer Box Enclosure with Durable Carpet Covering for Car Audio Systems

QPower QBGMCFF07408 8 Inch Quad Port Subwoofer Enclosure Box with Underseat Front Fire for GMC and Chevy Crew Cab 2007 to Current

QPower QBGMCFF07208 8 Inch Dual Port Subwoofer Enclosure Box with Underseat Down Fire for GMC and Chevy Crew Cab 2007 to Current

MTX 12" 400 Watt RMS Dual Loaded 1200 Watt Car Subwoofer Enclosure Audio with Sub Box, Mono Block & 8-Gauge Amplifier Complete Wiring Installation Kit

MTX TNE212DV 12-Inch 2000-Watt Max Car Audio Dual Loaded Subwoofer Box Enclosure

QPower QBASS Dual Vented 12 Inch Heavy Duty MDF Material Single Car Audio Subwoofer Enclosure Box with 2 Vents for Better Heat Management, Charcoal

MTX Car Audio

QPower QBASS Dual 10 Inch Heavy Duty Car Audio Subwoofer Enclosure Box, Charcoal

Kicker CWCS104 CompC 10" Subwoofer Single Voice Coil 4-Ohm

QPower 12 Inch Heavy-Duty Dual Sealed Carpet Covered Durable Car Audio Vehicle Subwoofer Enclosure Woofer Box, Charcoal Gray

Kicker 48CWRT122 CompRT 12" 2-Ohm DVC Subwoofer

Hifonics HFX12D4 12 Inch Subwoofer, 800 Watt Max 400 Watt RMS Single Speaker for Car & Powersports Vehicles, 1 Pair

QPower 15 Inch Heavy Duty Single Vented Carpet Covered Durable Car Audio Extra Large Vehicle Subwoofer Enclosure Woofer Box, Charcoal Gray

Kicker 52GL78 8" Square Mesh Grille

QPower 10 Inch Heavy-Duty Single Vented Carpet Covered Durable Car Audio Vehicle Subwoofer Enclosure Woofer Box, Charcoal Gray

Kicker CWCS124 CompC 12" Subwoofer Single Voice Coil 4-Ohm

Q-Power Shallow Single 12 Inch Heavy Duty Sealed MDF Material Truck Audio Subwoofer Enclosure Box with Durable Carpeted Exterior, Charcoal Gray

QPower QBOMB8V Dual 8 Inch Vented Port Subwoofer Sub Box with Bedliner Spray

QPower QBOMB12V Dual 12" Vented Ported Subwoofer Sub Box with Bedliner Spray

Kenwood P-XW1241S Single 12" Subwoofer in a Vented Enclosure and includes a X502-1 1000W Max Power eXcelon Class D Mono Amplifier

Kicker CVX102 COMPVX 10" Subwoofer Dual Voice Coil 2-Ohm 600W

QPower QBOMB15VL Single 15" Vented Ported Car Subwoofer Sub Box Enclosure QBOMB

King Boxes D12V 12-In. Double-Speaker Single-Port Black Carpeted Enclosure

MB Quart DS1-204 8 Inch 400 Watt MAX 200 Watt RMS 4 Ohm Dual Voice Coil, Shallow Slim Subwoofer Speaker Pair for Car Audio Sound System

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

High Power 8" Midrange Driver for Audio Performance with 360W Peak Power, 180W RMS, 8 Ohm Impedance, Paper Cone

Kicker 48CWR82 CompR 8" Subwoofer, DVC, 2-ohm

Kicker (2) 49L7TDF122 Down-Firing 12" L7T 2-Ohm Subwoofer Enclosure Bundle

Kicker 49L7X82 8" SoloX L7X Dual 2-Ohm Subwoofer