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Bowers and Wilkins HTM4D2R

Bowers & Wilkins Rosenut Diamond Series Speaker - Series II

This model is no longer available.
  • This model is no longer available.
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  • Features
  • Specifications
  • Product Wiki
  • Extended Warranty


When you want cinema sound in a less-than-cinema-sized room, the HTM4 Diamond is the perfect center channel speaker for smaller home theater set ups, thanks to a neat space-saving design and combined bass/mid range driver.
Accurate high frequencies are important in the centre channel. Uniquely for a speaker of its size, the HTM4 Diamond incorporates a diamond dome tweeter - helping to make sure that speech and dialogue are as clear and well-defined as possible

What's included in the box

  • Woven Kevlar     
  • Crossover Tuning     
  • Nautilus Tapering Tube     
  • Flowport     
  • Mushrooms     
  • Tweeter on Top     
  • Matrix     
  • Diamond Tweeters     
  • De-coupling     
  • Quad Magnet Tweeter Motor


Description2-way vented-box system
Drive units1x ø25mm (1 in) diamond dome high-frequency

1x ø165mm (6.5 in) woven Kevlar cone bass / midrange
Frequency range-6dB at 42Hz and 33kHz
Frequency response49Hz - 28kHz ±3dB on reference axis
DispersionWithin 2dB of reference response
Horizontal:over 60º arc
Vertical:over 10º arc
Sensitivity88dB spl (2.83V, 1m)
Harmonic distortion2nd and 3rd harmonics (90dB, 1m)

<1% 100Hz - 22kHz

<0.5% 150Hz -20kHz
Nominal impedance8Ω (minimum 4.7Ω)
Crossover frequency4kHz
Recommended amplifier power50W - 120W into 8Ω on unclipped programme
Max. recommended cable impedance0.1Ω
Height:279mm (11 in)
Width:486mm (19.1 in)
Depth:287mm (11.3 in)
Net weight12.5kg (27 lb)

Product Wiki

Extended Warranty



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