Mephis 6"X9" 60W Two Way Speakers Power Handling: 60 Watts RMS (120 Watts peak power) Design: 2-way coaxial with a graphite-reinforced polypropylene woofer cone and polyurethane surround Tweeter: PEI dome tweeter Frequency Range: 55 Hz – 20,000 Hz Sensitivity: 90 dB Mounting Depth: 3-3/16"