Kef – Q400b

KEF - Q400b

Centre, Dipole and Subwoofers

Reproducing most of the soundtrack narrative, the centre speaker is by far the most important in any home theatre surround sound system, and the Q200c and Q600c are engineered accordingly.

With a new generation 130mm (5.25in.) and 165mm (6.5in.) Uni-Q driver array respectively, flanked by a low distortion bass unit and an ABR of the same size, they combine raw power with the subtlety to convey moments of great delicacy.

What you notice is how convincingly the larger new metal dome tweeter captures the emotional range of the human voice – mood and character shine through with real clarity.

Your involvement in the action is noticeably enhanced by the addition of the Q800ds dipole to convey the left and right rear channels. With the two 130mm (5.25in.) Uni-Q arrays on each speaker playing out of phase, ambient 3-D effects are completely diffused throughout the listening area to create an uncanny illusion of actually being there, whether that’s deep in the rainforest, in a concert arena or driving along a gritty urban back street.

The final ingredient of your new Q system is of course the seductive Q400b subwoofer. A closed box design housing a 250mm (10in.) woofer driven by a 200W on-board Class-D amplifier, this discreet cube creates spectacular bass imagery – eloquent, musical and addictively physical. Anchoring the whole sound performance in an all-embracing sensation of immediacy, it completes the acoustic picture.

Model Q400b

Design Closed-box subwoofer

Drive Units 1 x 250mm (10in.)

Frequency Response ±3dB 28Hz – 140Hz

Amplifier 200W built-in Class-D

Maximum output (SPL) 110dB

Low pass filter variable 40Hz – 140Hz, 4th-order

Low level signal inputs RCA phono sockets

Speaker level inputs

Internal volume 23.2 litres

Power requirements 100 – 240V ac ~ 50/60Hz

Power consumption 200VA

Weight 13.6kg (29.9lbs)


(H x W x D) 335 x 330 x 330 mm (13.2 x 13.0 x 13.0 in.)

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