MCM Custom Audio 60-10030 8" Marine Wakeboard Two-Way Speaker Pair - White Poly cone woofer with rubber surround 1 titanium dome tweeter Power handling: 130W/260W (RMS/max) @ 4ohm, Frequency response: 30Hz~20KHz, Sensitivity: 91dB Heavy duty ABS construction Maximum mounting diameter: 1 1/2 - Minimum mounting diameter: 1 1/8