Bowers & Wilkins DM640i User Manual

DM640i

Floor-standing loudspeaker system

Product Summary

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Designed with the more demanding digital sources of the nineties in mind, the 600 series has
earned a reputation for minimal coloration and musical accuracy in audio reproduction.
Successfully capturing the transients found in music meant developing a loudspeaker able to
do justice to the attack of the original audio signal.
Designed by a master of industrial design Dr Kenneth Grange, the cool, dark lines of the
600 series cabinet are perfect partner for contemporar y furniture and interior design settings.

●

The profound low frequency response is achieved by the use of heavier Cobex cones in the
two 8in bass drivers, delivering a lower fundamental resonant frequency. The midrange unit is
a separate, acoustically isolated Kevlar driver mounted in its own sub enclosure.

●

This has been enhanced in the DM640 by taking the Silver Signature Kevlar cone profile,
and introducing a new rubber surround, making it identical in every respect to the Kevlar
driver in the much acclaimed B&W Matrix 805.

●

The crossover has been revised to accommodate the changed response of the new midrange
drive unit.

Technical highlights

●

B&W's Tweeter technology ensures that the sound remains focused and time sensitive and
that the stereo image is presented with unparalleled three dimensional accuracy.

●

The strict acoustic requirements of the cabinet have dictated a front baffle moulding of extra
high rigidity. The polymer has been chosen for its composition and ability to reduce unwanted
resonances to a minimum.

B&W Loudspeakers Ltd reserves the right to amend details of the specifications without notice in line with technical developments. E & OE. All trademarks acknowledged.

www.bwspeakers.com

Description

Drive Units

3-way 4th-order, variable port, bass
reflex digital monitor system with bi-wiring
1 x 26mm high frequency with metal
dome, high temperature voice coil and
fluid cooling
1 x 160mm midrange with rigid die-cast
chassis, Kevlar® diaphragm and 31mm
high-temperature voice coil on Kapton®
former
2 x 200mm bass/midrange with rigid
die-cast chassis and 31 dia high­temperature voice coil on Kapton®
former

Frequency Response

Sensitivity
Nominal Impedance
Power Handling

Dimensions

Finish

46Hz – 20kHz ± 2dB on reference
axis
91dB spl(2.83V 1m)
4 ohms
30W – 200W into 4 ohms on
undistorted speech and music
programme
Height: 965mm Width: 236mm
Depth: 407mm
Black Zelda