Kenwood - Class D Digital Mono Amplifier with Variable Low-Pass Crossover

KICKER - CompR Dual-Voice-Coil 4-Ohm Subwoofer

Monoprice 60-Watt Powered Subwoofer

AudioControl - 800W Monoblock Class D Amplifier

Kenwood - Road Series Single-Voice-Coil 4-Ohm Subwoofer

Sonance - R10SUB ENCLOSURE - Reference In-Wall Subwoofer Enclosure (Each)

Alpine - Powered Subwoofer System

Hifonics - ALPHA 3000W Class D Digital Mono Amplifier with Variable Low-Pass Crossover - Silver/Black

MartinLogan - WSK-1 Universal Wireless Subwoofer Connection Kit

AudioControl - Add-On Extension Port for 10 Dual-Voice-Coil 2-Ohm Loaded Subwoofer Enclosure

Alpine - Single-Voice-Coil 4-Ohm Loaded Subwoofer Enclosure with Integrated 120W Amp

Alpine - R-Series Class D Mono Amplifier with Variable Crossovers

MartinLogan - SWT-X Wireless Subwoofer System

KICKER - Hideaway Subwoofer with Enclosure and Integrated 150W Amplifier

KICKER - Subwoofer Grille

Monoprice Aria In-Wall Speaker, Passive Subwoofer, 200 watts max (single)

KICKER - Dual Single-Voice-Coil 2-ohm Loaded Subwoofer

KEF - Wireless Subwoofer Receiver

Fusion XS Series Sports-Style 600W Marine Subwoofer

Monoprice Premium Select 200-Watt Subwoofer

KICKER - 48CWR104 CompR 4-Ohm Subwoofer - Black/Red

Sonance - VPBPC4R - Visual Performance Bandpass Connector for BPS8 Subwoofer (Each)

KEF KSK92 Subwoofer Stacking Kit