2) Boss P694c 6x9-inch 800 Watt Phantom Speakers, 2) Boss P654c 6.5-inch 400 Watt 4-way Car Speakers, And Boss R1004 400 Watt 4-channel Amplifier : Target
Audiopipe 6x9" 4-Way CSL Series Coaxial Car Speakers 500 Watts (1-Pair) - Best Connections
BOSS Audio Systems P69.4C Phantom Series 6 x 9 Inch Car Audio Door Speakers - 800 Watts (Pair), 4 Way, Full Range, Tweeters, Coaxial, Sold in Pairs, Hook Up To Stereo and Amplifier
Pioneer A-Series 4-Way Coaxial Speaker System TS-A1680F - The Home Depot
Kenwood KFC-6986PS 6x9" 4-Way Speaker System, 600W Max Power - Creative Audio