Bowers and Wilkins CM-4 Brochure

CM 4

Floor-standing loudspeaker system

Product Summary

●

The CM4 is a 21/2-way floor-standing speaker finished in a choice of two real wood

veneers - Maple and Rosenut. The brushed aluminium baffle emphasises the clean, modern

design approach.

●

The slim floor-standing CM4 adds extra bass extension as well as resolving fine detail, and

can reach higher output levels for the larger room. Tube loading the tweeter ensures far

greater absorption of unwanted radiation from the rear of the diaphragm. The resulting

effect is to create a more focused and natural high frequency sound. The bass unit is made

from aluminium, which was selected for its excellent stiffness and ability to function as a

piston. Twin Flowports at the rear of the cabinet have surfaces dimpled like a golf ball to

smooth the airflow and reduce turbulence. The lower Flowport is integrally moulded with

the terminal tray.

Technical highlights

Nautilus™ Tweeter: B&W's Nautilus Tweeter technology ensures that the sound

remains focused and time-sensitive and that the stereo-image is presented with

unparalleled three dimensional accuracy.

Kevlar®: B&W developed and patented the method of using Kevlar® for

loudspeaker cones to reduce unwanted standing waves. DuPont originally

created Kevlar® for use in bulletproof vests.

Flowport™: Golf ball aerodynamics theory points the way towards lower

distortion reflex ports. Dimples improve the way the air flows over the surface of

any object. In the case of reflex ports, they offer a significant improvement over

simply flaring the port ends in reducing air flow turbulence at each end of the

port; so you get less chuffing noise and less compression at high sound levels.

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

Frequency response

Sensitivity

2

1

/2-way vented-box system

1 x 25mm alloy dome high-frequency

1 x 165mm woven Kevlar® cone

bass/midrange

1 x 165mm Aluminium cone bass

38Hz – 20kHz ± 3dB on reference

axis

90dB spl (2.83V, 1m)

Nominal impedance

Power handling

Dimensions

Finishes

8Ω (min 4.4Ω)

50W - 150W into 8 ohm on unclipped

programme

Height: 910mm Width: 200mm

Depth: 293mm

Cabinet: Real wood veneers, Maple,

Rosenut

Grilles: Black cloth