Amazon.com: Harmony HA-P12LS8 Replacement 12" Sub Pro PA 800W Subwoofer/Speaker 8 Ohm Woofer - 90oz Magnet : Musical Instruments
Amazon.com: Pyle 5 Inch Woofer Driver - Upgraded 200 Watt Peak High Performance Mid-Bass Mid-Range Car Speaker 450Hz - 7kHz Frequency Response 15 Oz Magnet Structure 8 Ohm w/ 92dB and Paper
Amazon.com: AudioPipe TXX-BDC4-12D 12 Inch 2,200 Watt High Performance Powerful Dual 2 Ohm DVC Vehicle Car Audio Subwoofer Speaker System, Black : Electronics
Amazon.com: Massive Audio GTX84 – 8 Inch Car Audio Subwoofer, High Performance Subwoofer for Cars, Trucks, Jeeps - 8" Subwoofer 400 Watt RMS, 800w MAX Dual 4 Ohm, 2 Inch Voice Coil. Sold Individually : Electronics
Amazon.com: PRV AUDIO 10 Inch Midrange Speaker 10MR1000X, 1000 Watts Program Power, 3 in Voice Coil, 8 Ohm, 500 Watts RMS Pro Audio Loudspeaker (Single) : Electronics