TROPO-6.5 - 400 Watt 6.5 Inch Car Subwoofer - CT Sounds – CT SOUNDS
BOSS Audio Systems B69LED Elite Series 6 x 9 Inch Car Audio Door Speakers - 500 Watts Max, 3 Way, Full Range, Coaxial, Sold in Pairs, Hook Up To Stereo and Amplifier, Tweeters
PYLE PLPW6D 6" Dual Voice Coil 4-Ohm Black Car Stereo Audio Subwoofers (2 Pack) - Walmart.com
Amazon.com: Pyramid 6" Car Audio Speaker Subwoofer - 300 Watt High Power Bass Surround Sound Stereo Subwoofer Speaker System w/ Molded P.P. Cone, 86 dB, 4Ohm, 40 oz Magnet,1 inch KAPTON Voice
5Core 8 inch Subwoofer Car Audio Speakers Subwoofer For Car Loudspeaker Woofer Replacement 100W,4Ohm WF 8110G | Reverb