18 inch subwoofer

PYLE PLPW8D 8" 1600W Car Audio Subwoofers Subs Woofers Stereo DVC 4-Ohm

QPower QBOMB12VL Single 12" Vented Ported Car Subwoofer Sub Box Enclosure QBOMB

Kicker 48CWRT104 CompRT 10" 4-Ohm DVC Subwoofer

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

Kicker 51HS12 Hideaway Compact Powered Subwoofer, 12-Inch

Kicker 48CWRT102 CompRT 10" 2-Ohm DVC Subwoofer

Kicker 49L7X121 - SoloX L7X 12-Inch (30cm), 3" Coil, Ferrite Competition Subwoofer, 1-Ohm

Kicker 48TRTP82 TRTP 8-inch Thin Down Firing Subwoofer and Passive Radiator Enclosure, 2-Ohm

Kicker 48TRTP122 Down-Firing 12" CompRT 2-Ohm Subwoofer Enclosure

Kicker 48CWRT124 CompRT 12" 4-Ohm DVC Subwoofer

Kicker TRTP 10" Loaded Down-Firing Subwoofer Enclosure

QPower QBOMB8VL Single 8 Inch Vented Ported Car Subwoofer Sub Box Enclosure

QPower QTW12 Single 12" Sealed Car Audio Subwoofer Sub Box Enclosures, Pair

Kicker 49L7X152 - SoloX L7X 15-Inch (38cm), 3" Coil, Ferrite Competition Subwoofer, 2-Ohm

Kicker L7R Bundle - Two 45L7R104 10-Inch Dual 4-Ohm Subwoofers

Kicker 46TL7T102 TL7T 10" (25cm) Solo-Baric Subwoofer in Thin Profile Enclosure, 2-Ohm, 500 Watt w/ Cast Aluminum Grill Bundle

8-Inch Low-Profile Amplified Subwoofer System for Enhanced Sound with Heavy Bass, Compact Design, All Audio Devices Compatible

Kicker 45L7R154 L7R 15" 4-Ohm DVC Subwoofer

Kicker 49L7X151 - SoloX L7X 15-Inch (38cm), 3" Coil, Ferrite Competition Subwoofer, 1-Ohm

Kicker 49L7X102 - SoloX L7X 10-Inch (25cm), 3" Coil, Ferrite Competition Subwoofer, 2-Ohm

Kicker KMF12 12-inch (30cm) Weather-Proof Subwoofer for Freeair Applications, 2-Ohm

Kicker 51HS10 Hideaway Compact Powered Subwoofer, 10-Inch & 46KISL K-Series Interconnect, Speaker Wire To RCA Adapters

Kicker 51HS12 Hideaway Compact Powered Subwoofer, 12-Inch & 46KISL K-Series Interconnect, Speaker Wire To RCA Adapte

Kicker KMF12 12-inch (30cm) Weather-Proof Subwoofer for Freeair Applications 4-Ohm