Summary Details: Kef r400b subwoofer at just 14 inches square, the kef r400b may be compact, yet it packs an incredible punch'. '.strtoupper('w')ith a reinforced and braced sealed cabinet, the r400b houses twin 9 inch lf drivers powered by twin 250w class d amplifiers'. '....
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Kef r400b subwoofer at just 14 inches square, the kef r400b may be compact, yet it packs an incredible punch'. '.strtoupper('w')ith a reinforced and braced sealed cabinet, the r400b houses twin 9 inch lf drivers powered by twin 250w class d amplifiers'. '.strtoupper('t')he drivers are mounted back to back, to create lsquoforce cancelling'. '.strtoupper('t')his means the opposing reactive forces are nullified, resulting in no cabinet agitation and a clean, fast, powerful bass performance ndash perfect for any serious home theatre system'. '.strtoupper('m')odel r400b design powered subwoofer sealed frequency range 6db 26hz 140hz maximum output 111db amplifier 2 x 250w 500w built in class d low pass filter variable40hz 140hz, 4th order low level signal inputs rca phono sockets