Pyle PLTB8A 8 ft. ft. 400 Watt Amplified Injection Molded Subwoofer Tube 200W rms/400W max power 8'' high power 4-ohm subwooferHigh quality poly mica coneNon-fatiguing butyl rubber surround1.5'' high temperature aluminum voice coilBass reflex vented for added sub-bass responseHigh quality plastic construction35 oz. magnet structureFrequency response: 50Hz-150kHz20'' W x 10'' D Includes plastic mounting bracket, wires and installation hardware