The SPR-M700 6.5" speakers are part of Alpine's innovative marine lineup, specifically designed for both fresh and saltwater boats. Two-way coaxial speakers offer excellent power handling and great performance. A titanium/PEI balanced dome tweeter swivels to direct the highs toward the listener, while the 7" woofer provides big bass that carries into the outdoor environment. Centrex grilles and high strength, non-resonant, high temperature ABS frames remain durable. Resistant to UV rays, moisture, and chemicals. 30 watts RMS/100 watts peak power handling. 5" woofer mounting diameter.