Pioneer TS-600M, 6-1/2" 4-way Coaxial Speakers, 320W Max Power | 11mm Tweeter and 11mm Super Tweeter and 1-5/8" Cone Midrange | Coaxial Speakers | (Sold in Pairs) - Walmart.com
Sony XS-R1645 Speakers 4-way car -40W RMS (Re-Pack) – Amazing Electronics
New Dual Bluetooth 200W Car Stereo w/ 4 6 1/2" Speakers USB Aux Voice Activation | eBay
Amazon.com: Dual DS465 4-Way 6 ½ inch Car Speakers with 160-Watt Power & 35mm Mylar Balanced Dome Midrange : Electronics
Amazon.com: Pioneer TS-A1685R 350 Watts 4-Way Car Speakers, 6 1/2 Inch - 6 3/4 Inch, 1 Pair (Discontinued by Manufacturer) : Everything Else
JBL - STADIUM62F 6 1/2" Multielement Car Audio Speakers (Pair) w/ STADIUM192T 3/4" Car Audio Tune Up Tweeter (Pair) - Creative Audio
Alpine SPS-610 Type S 6-1/2" 2-way car speakers — fits in 6-1/2" or 6-3/4" openings at Crutchfield