Bowers & Wilkins TM4S - Page 4

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