Amazon.com: DS18 ZR8.2D Elite-Z 8" Car Audio Subwoofer 1000W Watts Dual Voice Coil 2-Ohm DVC 2+2 OHMS (1 Speaker),Black : Video Games
Amazon.com: Pyramid WH88 8-Inch 250 Watt High Power Paper Cone 8 Ohm Subwoofer
Amazon.com: 2x Harmony HA-P18"WS8 Raw Replacement 18" Pro PA 1200W Sub Speaker 8 Ohm Woofer : Musical Instruments
Amazon.com: PRV AUDIO 6MB200 v2 6.5 Inch Speakers Midbass Woofer 8 Ohm, 100 Watts RMS, 200 Watts Program Power, 93.5 dB 1.5 in Voice Coil for Small Custom Enclosures Pro Car Audio System (Single) : Musical Instruments