quad 8 inch subwoofer box

Focal SUB 12 DUAL 12" Subwoofer, Dual 4-Ohm 300W RMS - 600 W MAX

Kicker 47KEY2004 4-Channel DSP Smart Amplifier, 4x50W w/ 51HS8 Hideaway Compact Powered Subwoofer Enclosure with 8-Inch Subwoofer HS8 Bundle

Kicker Two 45KM104 10" Marine Subwoofers 4-Ohm White LED Grill with SSV Universal Marine Sub Box Enclosures

Kicker 49L7TDF82 Down-Firing 8" L7T 2-Ohm Subwoofer Enclosure & KEY5001 Smart Sub Amp / Processor, Bass Knob Bundle

Kicker 49L7TDF82 Down-Firing 8" L7T 2-Ohm Subwoofer Enclosure & KEY5001 Smart Sub Amp / Processor Bundle

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

Kicker Marine KPX500.1 Powersports Amp & 8" CompRT DVC 4 Ohm. Subwoofer Audio Upgrade

Kicker 48VCVR122 CompVR 12" single subwoofer in vented box, 2-ohm w/ Speaker Wire Bundle

PowerBass 3XL-810D - 8" Dual 1-Ohm VC 500Wrms / 750Wmax Subwoofer

Kicker SOLOX 49L7X121 12" Subwoofer & Single Unloaded Enclosure

Kicker SOLOX 49L7X121 12" Subwoofer & Enclosure with WXA3600.1 Warhorse Mono Amplifier

Kicker 51KGMDL7T122 L7T Custom Fit Dual 12" Subwoofer Down Firing Enclosure, Compatible with Select Sierra or Silverado, 2-Ohm

Infinity KAPPA8130MAM - Kappa Marine KAPPA8130M White 8" Premium 3-Way RGB LED Convertible Speakers

Kicker Marine KPX500.1 Powersports Amp & 8" TB Loaded Enclosure 2 Ohm Subwoofer Audio Upgrade

Kicker Marine KPX500.1 Powersports Amp & 8" Solo-Baric L7S DVC 2 Ohm. Subwoofer Audio Upgrade

Kicker 49L7X81 8" SoloX L7X Dual 1-Ohm Subwoofer

Kicker 52DCVR122 CompVR 12" dual subwoofers in vented box, 2-ohm

Kicker L7S152 L7S 15" Subwoofer Dual Voice Coil 2-Ohm 1000W

Kicker Marine Amplifier Speaker Bundle 8" LED Speaker (2 Pair) with 4 Channel Amp

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

Kicker 50CVX154 CompVX 15-Inch Subwoofer, Dual 4-Ohm

Kanto Ren Powered Speaker System (black) and SUB8 Powered 8in Subwoofer (white) Bundle

Kicker Marine KPX500.1 Powersports Amp & 8" TB Loaded Enclosure 4 Ohm Subwoofer Audio Upgrade

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