Subwoofer activ Definitive Technology ProSub 800 Subwoofer activ, 300W Outer Dimensions: 10.3"Wx 15.8"Wx 12.9" H Frequency Response: 20 Hz – 150 kHz Driver Complement: One 8" woofer with polymer cone coupled to one 8" infrasonic radiator Amplifier: 300-Watts RMS Speaker Level High-Pass Filter: 6 db/octave (80 hz) Low-Level Low-Pass Filter: 24 db/octave continuously variable (40 hz – 150 hz) plus unfiltered LFE directcoupled input Fuse Size: 3.2 amp 250 volt slow-blow Littlefuse 313 type for the 110 volt version, and 2 amp 250 volt slow-blow BEL 5ET type for the 240 volt version.