4 hole subwoofer box

Kicker 43C84 Comp 8" Subwoofer, Single Voice Coil, 4-Ohm

Alpine (2) S2-W8D4 8" S-Series Dual 4 Ohm Car Subwoofer & (2) KTE-8G.3 Grille Bundle

PowerBass Two S-12TD Dual 4-Ohm Shallow 12" Subwoofers With A ASA3-600.1D Amplifier

Cerwin-Vega V10DV4 - 10" 4-Ohm Dual Voice Coil Subwoofer 1000Wrms/3000Max

Kicker (2) 51MWF124 - MWF 12-Inch Premium Marine Subwoofer (free-air) 4-ohm & 48KMA6004 Marine Amp Bundle ( Includes LED Remote )

Kicker 45L7R104 L7R 10" Subwoofer, Dual Voice Coil, 4-Ohm & 52GL710 Grill Bundle

ATG Transcend Series 2500 Watt Class D Mono Amplifier with (2) 10" 4 Ohm DVC Subwoofers and 0 Gauge Amp Kit

Kicker 48CWRT84 CompRT 8" Subwoofer, DVC, 4-ohm w/ 47Key5001 Amp Bundle

Alpine RS-W12D4 12-inch R-Series Shallow Subwoofer Dual 4 Ohm & Grill Bundle

Kicker (2) 45L7R124 L7R 12-Inch (30cm) Subwoofer, Dual Voice Coil, 4-Ohm w/ Cast Aluminum Grill Bundle

Kicker 51MWE124 - MWE 12-Inch Premium Marine Subwoofer (for enclosure applications) 4-ohm

Kicker 51MWE104 - MWE 10-Inch Premium Marine Subwoofer (for enclosure applications) 4-ohm

Kicker 45L7R104 L7R 10-Inch (25cm) Subwoofer, Dual Voice Coil, 4-Ohm w/ White LED Grill & Remote Bundle

Kicker (2) 45L7R124 L7R 12-Inch (30cm) Subwoofer, Dual Voice Coil, 4-Ohm w/ White LED Grill Bundle

Kicker 46L7T104 L7T L7-Thin 10-Inch (25cm) Subwoofer, Dual Voice Coil, 4-Ohm, 500 Watt w/ Charcoal LED Grill Bundle

PowerBass 2 S-10T Shallow Mount 10" 4-Ohm Subwoofer + 1 ASA3-600.1 Amplifier

Kicker LX1650.1, (2) 12" CompQ 4 Ohm, Subwoofer & 1650w Mono Class-D Amp Bundle (51LX16501)(51CWQ124)

Diamond Audio DESMB10DA Dual 10" Amplified Subwoofer + 4 Gauge Wiring Kit Complete Bass Install Package

Memphis MM1024 10" Marine Subwoofer and SRXPT SRX 4" Pro Tweeters and SRXP62V2 SRX Pro 6.5" with MM900.6V 6-Channel Marine Amplifier and All-In-On...

Kicker (2) 51MWE124 - MWE 12-Inch Premium Marine Subwoofer (Enclosure) 4-ohm & 48KXMA9005 Marine Amp Bundle

Hertz HMS 10 S4-LD-SW.1 - 10" 4-Ohm Marine Subwoofer with RGB LEDs, White Sport Grille

Kicker 45L7R104 L7R 10-Inch (25cm) Subwoofer, Dual Voice Coil, 4-Ohm w/ Charcoal LED Grill & Remote Bundle

Kicker (2) 45L7R104 L7R 10-Inch (25cm) Subwoofer, Dual Voice Coil, 4-Ohm w/ Charcoal LED Grill & Remote Bundle

Wet Sounds REVO 12 HP S4 V3 - 12" High Power 4 Ohm Subwoofer with REVO 12 ADP XZ-W Grille Kit and PORTED-12-ENC 12" Rotomold Ported Enclosure