Cadence Acoustics XS652 135-Watt Peak 2-Way Speaker System 6.5" Xenith Series 2-Way Car Speakers Power Handling: Peak: 270 watts per pair / RMS: 90 watts per pair Polypropylene cone Rubber surround 1/2" PEI semi-dome tweeter Cadence XS652 6.5-inch 4 ohm 2-Way Speaker System Power Handling: 45W RMS/135W Peak/250W Xenith Power Frequency Response: 65Hz  20 kHz Sensitivity: 90dB @ 1w/1m Mounting Depth: 1.61-inch