Polk Audio PSW10 10-Inch Monitor Series Powered Subwoofer (Single, Black)

Boss KIT-2 Complete 8 Gauge Amplifier Installation Kit

Mediabridge ULTRA Series RCA Y-Adapter (12 Inches) - 1-Female to 2-Male for Digital Audio or Subwoofer

Pyle PLPW6D 6-Inch 600 Watt Dual 4 Ohm Subwoofer

Pyle PLPW8D 8-Inch 800 Watt Dual 4 Ohm Subwoofer

Kicker 10C124 Comp 12-Inch Subwoofer 4 SVC (Black)

Pyle PLG64 6.5-Inch 300-Watt Mid-Bass Woofer

Rockford Fosgate R2D4-10 Prime R2 DVC 4 Ohm 10-Inch 250 Watts RMS 500 Watts Peak Subwoofer

Kicker 10C104 Comp 10-Inch Subwoofer 4 Ohm (Black)

Kenwood KFCXW-1000F eXcelon 10 inch Shallow Subwoofer

KRK K10S Powered Subwoofer - 10 Inch, 225 Watts

LifeProof Realtree Fre Case for iPhone 4/4S - Retail Packaging

Pioneer TSW310D4 12-Inch Champion Series Subwoofer with Dual 4 Ohm Voice Coil 1,400 Watts Max Power

Kicker 10CVR124 12 800 Watts Dual 4 Ohm Comp VR Series Car Subwoofer

MTX Audio Terminator Series TNE212D 1,200-Watt Dual 12-Inch Sub Enclosure

Lanzar MAXP154D Max Pro 15-Inch 2000-Watt Small-Enclosure Dual 4-Ohm Subwoofer

Pyle PASW15 Stage Speakers

Bbox Pro Series Single 10-Inch Sealed Subwoofer Enclosure (Charcoal)

Rockford Fosgate P2D4-10 Punch P2 DVC 4 Ohm 10-Inch 300 Watts RMS 600 Watts Peak Subwoofer

Boss Audio R1100M Mosfet Monoblock Power Amplifier with Remote Subwoofer Level Control

The above is "Sub Woofer 4 Inch, Polk Audio PSW10 10-Inch Monitor Series Powered Subwoofer (Single, Black)" recommended related products, Please click on the picture to see product details and sub woofer 4 inch reviews!