4 hole subwoofer box

Crunch 4 Pack CRW10D4 10" 400W MAX 4 Ohm Dual Voice Coil Car Subwoofer Speaker

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

Monoprice 12-inch Powered Subwoofer - Black, 150-watt (RMS)

SVS SoundPath Subwoofer Isolation System

Kicker 50CWCD84 CompC 8" Subwoofer Dual Voice Coil 4-Ohm

Pyle 10" In-Wall/In-Ceiling Subwoofer, 360W Peak Power - PDIWS10

Hifonics 4 Pack 8" Subwoofer, 250W Max 125W RMS Car & Powersports Speaker, Black

Kicker 48CWR104 CompR 10" Subwoofer, DVC, 4-ohm

Kicker 46L7T104 L7T L7-Thin 10-Inch (25cm) Subwoofer, Dual Voice Coil, 4-Ohm, 500 Watt

Hertz Dieci Series DS-253 10" (250mm) 250 Watt RMS 4-Ohm SVC Subwoofer

Pyle Car Stereo Wiring Kit - Audio Amplifier & Subwoofer Speaker Installation Cables (4 Gauge)

Crunch 4 Pack CRW8D4 8" 250 Watt MAX 4 Ohm Dual Voice Coil Car Subwoofer Speaker

Kicker 44L7S154 Solobaric L7 15" Subwoofers Bundle - Dual 4-Ohm Voice Coils for wiring to a 1-ohm monoblock amplifier

Crunch 2 Pack CRW10D4 10" 400W MAX 4 Ohm Dual Voice Coil Car Subwoofer Speaker

Alpine KTE-RS12G Grille for 12" RS-W12D4 and RS-W12D2 Subwoofers

Alpine W12S4 12-inch Single 4 Ohm Subwoofer

4) HIFONICS HFX12D4 12" 2400W Car Audio DVC Subwoofers Power Bass Subwoofers

Kicker Marine KPX500.1 Powersports Amp & (2) 12" 4 Ohm Premium Marine Subwoofer (Charcoal Grill ) Includes LED Remote

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

Crunch CRW8D4 8 Inch 250 Watt MAX 4 Ohm Dual Voice Coil Car Subwoofer Speaker

Crunch CRW10D4 10 Inch 400 Watt MAX 4 Ohm Dual Voice Coil Car Subwoofer Speaker

HIFONICS 12" 1600W Car Audio Subwoofers, DVC Speakers (2 Pack), Bundled with QPower Ported Enclosure Box