Bowers & Wilkins DM640i Speaker User Manual

Floor-standing loudspeaker system
Product Summary
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 contemporary 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.
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®
2 x 200mm bass/midrange with rigid
die-cast chassis and 31 dia high-
temperature voice coil on Kapton®
Frequency Response
Nominal Impedance
Power Handling
46Hz – 20kHz ± 2dB on reference
91dB spl(2.83V 1m)
4 ohms
30W – 200W into 4 ohms on
undistorted speech and music
Height: 965mm Width: 236mm
Depth: 407mm
Black Zelda