Bowers & Wilkins CM4 - Manual

CM 4
Floor-standing loudspeaker system
Product Summary
● The CM4 is a 2
1
/
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
8 Ω (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