Amazon.com: 4 Pioneer 6x9 Inch 3-Way 420 Watt Car Coaxial Audio Stereo Speakers | TS-A6966R : Electronics
2x Loud 6x9" Car Speakers PRV 500 Watt 4 Ohm Midrange PRO Audio 69MR500-4 BULLET 810075520293 | eBay
Amazon.com: H YANKA 6x9 Car Speakers, 500 Watt Max 4-Way Coaxial Speakers Car Audio, Professional 6x9 Speakers, Truck Speakers, 6 9 Car Speakers, 6 by 9 Speakers for Car Audio, Door Speakers (1 Pair) : Electronics