Amazon.com: Gravity Car Vehicle Subwoofer Audio Speaker - 15 Inch Competition Grade Pressed Paper Cone, 2 Ohm DVC, Advanced Air Flow, 7000W Power for Stereo Sound System Warzone GW15D2 (2 Subwoofers) : Electronics
Amazon.com: Deaf Bonce Car Audio 15 Subwoofer 5600W Dual 1 Ohm Apocalypse DB -3015R-D1
2 Pack American Bass 15" Subwoofer 1200W RMS Power DVC 4 Ohm Elite 1544 Series : Electronics - Amazon.com
Amazon.com: Pyle 12' Car Audio Speaker Subwoofer - 1600 Watt High Power Bass Surround Sound Stereo Subwoofer Speaker System - Non Press Paper Cone, 90 dB, 40 Ohm, 60 oz Magnet, 2
Amazon.com: Massive Audio GTX154 – 15 Inch Car Audio Subwoofer, High Performance Subwoofer for Cars, Trucks, Jeeps - 15" Subwoofer 700 Watt RMS, 1400w MAX Dual 4 Ohm, 2.5 Inch Voice Coil. Sold Individually : Electronics
Amazon.com: American Bass XO-1544 15-inch Subwoofer 500 Watt RMS / 1000 Watt Max Dual Voice Coil 4 Ohm Voice Coils 125 Oz Magnet : Musical Instruments