New Dual ALB12 12" 300W Amplified Car Subwoofer with Enclosure + 8 Gauge Amp Kit New Dual ALB12 12" 300 Watts Power Amplifier Subwoofer Sub with Ported Enclosure Size 12" SPL (db @ 1w/1m) 87dB Frequency Response 25Hz 200Hz Nominal Impedance 4 ohm