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

Hifonics - ALPHA 2000W Class D Digital Mono Amplifier with Variable Low-Pass Crossover

KEF - Wireless Subwoofer Receiver

KENWOOD -Compact Subwoofer with Enclosure and integrated 250W Amplifier

MartinLogan - WSK-1 Universal Wireless Subwoofer Connection Kit

JBL - BASSPRO Single-Voice-Coil Loaded Subwoofer Enclosure with Integrated Amp

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

Monoprice Premium Select 200-Watt Subwoofer

KEF KSK92 Subwoofer Stacking Kit

Fusion XS Series Sports-Style 600W Marine Subwoofer

AudioControl - 300W Monoblock Class D Micro Amplifier

Bose - F1 Subwoofer

Sonance - VPBPC3R - Visual Performance Bandpass Connector with Subwoofer Grille (Each)

KICKER - Subwoofer Grille

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

MartinLogan - SWT-X Wireless Subwoofer System

KEF - Wireless Subwoofer Adapter Kit

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

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

KICKER - Hideaway Compact Powered Subwoofer

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

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

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

Monoprice 60-Watt Powered Subwoofer