A 12" speaker that is well balanced for all bass applications. 12" speaker 350 watt rated power Neodymium Magnet Aluminum Basket Available in 4 or 8 ohm impedance General Characteristics Nominal Overall Diameter 320 mm 12.0 in Nominal Voice Coil Diameter 65 mm 2.50 in Magnet Weight 220 g 7.75 oz Overall Weight 5.60 lbs Flux Density 1.14 T Thiele-Small Parameters Voice Coil DC Resistance RE 5.46 ohms Resonance Frequency ƒS 46.8 Hz Mechanical Q Factor QMS 12.58 Electrical Q Factor QES 0.44 Total Q Factor QTS 0.43 Mechanical Moving Mass MMS 56.7 g