B&W DM 640 i

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Contents 1 Description 1.1 Product Summary 1.2 Technical highlights 1.3 Description 1.4 Drive Units 1.5 Frequency Response 1.6 Sensitivity 1.7 Nominal impedance 1.8 Power Handling 1.9 Dimensions 1.10 Finish

[edit] Description

[edit] Product Summary

• Manufacturer: B&W
• 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.

[edit] 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.

[edit] Description

• 3-way 4th-order, variable port, bass

reflex digital monitor system with bi-wiring

[edit] Drive Units

• 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

[edit] Frequency Response

• 46Hz – 20kHz ± 2dB on reference

axis

[edit] Sensitivity

• 91dB spl(2.83V 1m)

[edit] Nominal impedance

• 91dB spl(2.83V 1m)

[edit] Power Handling

• 30W – 200W into 4 ohms on

undistorted speech and music programme

[edit] Dimensions

• Height: 965mm
• Width: 236mm
• Depth: 407mm

[edit] Finish

• Black Zelda