KICKER CS Series 4" x 6" 2-Way Car Speakers with Polypropylene Cones (Pair) Yellow/Black 46CSC464 - Best Buy
Amazon.com: Pyle 4'' x 6'' Three Way Sound Speaker System - Pro Mid Range Triaxial Loud Audio 240 Watt per Pair w/ 4 Ohm Impedance and 3/4'' Piezo Tweeter for Car Component
DOWN4SOUND CFXT46 - 4x6 INCH CAR AUDIO SPEAKERS - 145W RMS ( PAIR ) - Down4Sound Shop