Bowers & Wilkins CM4 Owner's Manual & Warranty page 28

CM4
Nautilus™ tweeter
Technical Features
Kevlar® brand fibre cone bass/midrange
Flowport
2
Description
1x ø25mm (1 in) alloy dome high-frequency
Drive units
1x ø165mm (6.5 in) woven Kevlar® cone
bass/midrange
1x ø165mm (6.5 in) Aluminium cone bass
Frequency range -6dB at 29Hz and 30kHz
38Hz – 20kHz ±3dB on reference axis
Frequency response
Within 2dB of reference response
Dispersion
Horizontal:
Vertical:
90dB spl (2.83V, 1m)
Sensitivity
2nd and 3rd harmonics (90dB, 1m)
Harmonic distortion
<1%
<0.5% 65Hz – 20kHz
8Ω (minimum 4.4Ω)
Nominal impedance
150Hz, 4kHz
Crossover frequencies
50W – 150W into 8Ω on unclipped programme
Power handling
0.1Ω
Max. recommended
cable impedance
Height: 910mm (35.8 in)
Dimensions
Width: 200mm (7.8 in)
Depth: 293mm (11.5 in)
18 kg (40 lb)
Net Weight
-way vented-box system
over 40˚ arc
over 10˚ arc
55Hz – 20kHz
CM6
Nautilus™ tweeter
Kevlar® brand fibre cone bass/midrange
Flowport
3-way vented-box system
1x ø25mm (1 in) alloy dome high-frequency
1x ø165mm (6.5 in) woven Kevlar® cone
bass/midrange
2x ø165mm (6.5 in) Aluminium cone bass
-6dB at 30Hz and 30kHz
38Hz – 20kHz ±3dB on reference axis
Within 2dB of reference response
Horizontal:
Vertical:
90dB spl (2.83V, 1m)
2nd and 3rd harmonics (90dB, 1m)
<1% 70Hz – 20kHz
<0.5% 95Hz – 20kHz
8Ω (minimum 3.0Ω)
400Hz, 4kHz
50W – 200W into 8Ω on unclipped programme
0.1Ω
Height: 1050mm (41.3 in)
Width: 200mm (7.8 in)
Depth: 363mm (14.3 in)
28 kg (62 lb)
over 40˚ arc
over 10˚ arc