Bowers & Wilkins HTM61 Owner's Manual page 43

Technical features
Frequency response
Harmonic distortion
Nominal impedance
Crossover frequency
Recommended amplifier power
Max. recommended cable impedance
40
HTM62
Nautilus
Kevlar
Flowport
Magnetic Shielding
Description 2-way vented-box system
Drive units 1x ø25mm (1 in) aluminium dome high-frequency
2x ø130mm (5 in) woven Kevlar
Frequency range -6dB at 45Hz and 50kHz
55Hz - 22kHz ±3dB on reference axis
Dispersion Within 2dB of reference response
Horizontal: over 20
Vertical:
Sensitivity 85dB spl (2.83V, 1m)
2nd and 3rd harmonics (90dB, 1m)
<1% 100Hz - 22kHz
<0.5% 150Hz - 20kHz
8Ω (minimum 4.3Ω)
4kHz
30W - 120W into 8Ω on unclipped programme
0.1Ω
Dimensions Height: 170mm (6.7 in)
Width:
Depth: 308mm (12.2 in)
Net weight 9.1kg (20.1 lb)
™ tube-loaded aluminium dome tweeter
® brand fibre cone bass/midrange
™
o arc
over 60 o arc
438mm (17.3 in)
HTM61
HTM62
® cone bass/midrange