Bowers & Wilkins TM4S User Manual page 4

Technical features
Description
Drive units
Frequency range
Frequency response
Dispersion
Sensitivity
Harmonic distortion
Nominal impedance
Crossover frequencies
Recommended amplifier power
Max. recommended
cable impedance
Dimensions
Net weight
Finishes
HTM 3
Free-mounted aluminium dome tweeter
®
Kevlar brand fibre cone FST ™ midrange
®
Rohacell cone bass
Matrix ™ cabinet
Magnetic shielding
3-way closed-box system
1x ø25mm (1 in) aluminium dome high-frequency
®
1x ø150mm (6 in) woven Kevlar cone FST
®
2x ø165mm (6.5 in) Rohacell cone bass
-6dB at 35Hz and 50kHz
42Hz – 22kHz ±3dB on reference axis
Within 2dB of reference response
Horizontal: over 60º arc
Vertical: over 10º arc
90dB spl (2.83V, 1m)
2nd and 3rd harmonics (90dB, 1m)
<1% 100Hz – 22kHz
<0.5% 120Hz –20kHz
8 (minimum 3.2 )
350Hz, 4kHz
50W – 250W into 8 on unclipped programme
0.1
Height: 320mm (12.6 in)
Width: 783mm (30.8 in)
Depth: 316mm (12.4 in)
28kg (62 lb)
Cabinet Real wood veneers
Cherrywood
Rosenut
Black Ash
Grille Black cloth
HTM 4
Free-mounted aluminium dome tweeter
®
Kevlar brand fibre cone bass/midrange
Matrix ™ cabinet
Flowport ™
Magnetic shielding
2-way vented-box system
1x ø25mm (1 in) aluminium dome high-frequency
™ midrange 1x ø165mm (6.5 in) woven Kevlar
-6dB at 42Hz and 50kHz
49Hz – 22kHz ±3dB on reference axis
Within 2dB of reference response
Horizontal: over 60º arc
Vertical: over 10º arc
88dB spl (2.83V, 1m)
2nd and 3rd harmonics (90dB, 1m)
<1% 100Hz – 22kHz
<0.5% 150Hz –20kHz
8 (minimum 2.6 )
4kHz
50W – 120W into 8
0.1
Height: 279mm (11 in)
Width: 486mm (19.1 in)
Depth: 287mm (11.3 in)
12.5kg (27 lb)
Cabinet Real wood veneers
Cherrywood
Rosenut
Black Ash
Grille Black cloth
®
cone bass/midrange
on unclipped programme