KEF Audio 3000 Series - Manual (Page 8)

It’s the first subwoofer at this price level that you won’t
want to hide away out of sight. With an ultra-reliable high
efficiency 250W class D amplifier powering a 250mm
(10in.) driver with an auxiliary bass radiator of the
same size, the radical HTB2 model subwoofer anchors
the 3D sound image with stunningly realistic low
frequency reproduction.
Whether you prefer to position it vertically or horizontally,
the story’s the same: an acoustically inert enclosure
shaped to eliminate internal standing waves,
extremely fast response and SmartBass
‘connect and go’ versatility with
simple bass boost and
phase controls.
Subwoofer