GA1501: Type Plastic Speaker System type: 2 Way Molded Speaker Box Woofer: 15 inch woofer, 50 OZ 65.5 mm VC, 8 Ohm Tweeter: 34.4 mm TI. Diao driver, 12.4 OZ 8 Ohm Frequency Response: 40-20 KHz (-10 dB) Sensitivity: 99±3 dB/M/W Dimensions (W*D*H): 450*360*680mm Net Weight: 18.5 kg Green Product Yes