Pioneer 4" x 6" 2-way Coaxial Speakers (Pair) Black TS-G460 - Best Buy
Kicker 46CSC464 CS 4" x 6" 100 x 160 mm Coaxial Speaker System – Car Audio Centre
Pyle 3-Way Universal Car Stereo Speakers - 300W 4" x 6" Triaxial Loud Pro Audio Car Speaker Universal OEM Quick Replacement Component Speaker Vehicle Door/Side Panel Mount Compatible PL4163BK (Pair) : Amazon.co.uk:
JBL GTO Series Premium 4 x 6 Inches Co-Axial Speakers Pair with Patented Plus One Woofer Cone, Silk Dome Tweeters - Set of 2 Bundled with Earbuds : Amazon.co.uk: Electronics & Photo