CWR Boss Audio MR50B 5.25" Round Marine Boat Speakers Pair Black Power Handling, Peak: 150W. Magnet Structure: 30 Oz. Impedance: 4 OHM. Frequency Response: 120HZ-18KHZ. Spl 1 watt/1 meter: 90dB. Cone Material: Poly Injection. Voice Coil: 3/4" Aluminum. Tweeter: 1" Mylar Dome. Grilles: Plastic. Watts: 150 watt. Mounting Style: Flush. Dimensions: 7"H x 7"W x 8"L. Weight: 3.4lbs. Warranty: 1 Year.