In Phase Car Audio SXT1035 Speaker - 4 Inch (10cm) Round, 200W, 2-Way Coaxial Shallow-Mount Speaker (2 x Speakers)BUILT FOR CRYSTAL CLEAR SOUND Poly Mica coated cone, Butyl Rubber surround and Aluminium Chassis. A budget friendly shallow mounted speaker which produces beautiful high notes and resonant bass notes 200 WATT PEAK POWER HANDLING These speakers allow up to 200W peak power to each speaker and 30W RMS power BIG BASS 4 (10cm) poly mica coated cone DYNAMIC MIDRANGE PEI neodymium dome CLEAR HIGH END Piezo Tweeter 1" HIGH TEMPERATURE VOICE COIL Ferro fluid