5 Core 6x4" 2PCS Car Audio Stereo Truck Subwoofer Replacement DJ Speaker Sub Woofer Loudspeaker Wide Full R SP-6X4 | Zoro
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
Amazon.com: Rockford Fosgate P1462 Punch 4"x 6" 2-way Coaxial Full Range Speakers - Black (Pair) : Electronics