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Amazon.com: BOSS Audio Systems P69.4C Phantom Series 6 x 9 Inch Car Door Speakers - 800 Watts (Pair), 4 Way, Full Range, Tweeters, Coaxial, Sold in Pairs, Hook Up to Stereo and Amplifier : Electronics
JBL Club 9632 Club Series 6"x9" 3-way car speakers at Crutchfield
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Amazon.com: CT Sounds BIO-6X9-COX 6x9 Inch Coaxial Car Speakers, 200 Watts Max, Pair : Electronics