2 speakers compatible with ALPINE SXE-5725S coaxial 2-way 5 x 7" 13 x 18 cm 130 x 180 mm 35 watt rms 200 watts max 4 ohms, per pair : Amazon.nl: Electronics & Photo
Amazon.com: DS18 G5.7Xi GEN-X 5x7 2-Way Coaxial Speakers 150 Watts Max Power 4-Ohm - Full Range Speaker with Dome Tweeter Great for Car Stereo Sound System - 2 Speakers