The SPR-M700 7" 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 1" titanium 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. 50 watts RMS/150 watts peak power handling. 6-13/32" woofer mounting diameter.