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Manafacture: Bowers & Wilkins File size: 3.83 mb File name: Language of manual:

Photos and specs  Bowers & Wilkins  HTM1D

Use the chart of figure 1 to check the contents for your particular model. Contact your dealer if there are any help the perception of the central image although the formation of such images is missing items. for any listeners sitting away from the never quite as precise as it is between POSITIONING Stray magnetic fields If you are using speakers in a home theatre set-up and you are using a CRT screen (a traditional tube television or back projector), make sure the picture is not going to be distorted by stray magnetic fields from the drive unit motor systems. The following dedicated centre speakers are magnetically shielded because their application requires them to be placed right next to the screen: HTM1D HTM2D HTM3S HTM4S All other speakers in the Series should be placed at least 0.5m (20-in) from such screens. Some television brands are particularly sensitive to magnetic fields and may require extra spacing. Plasma and LCD screens are not affected and front projectors are usually well away from the speakers anyway. Application f Go to Front left and right 2.1 Front centre 2.2 Surround 2.3 2.1 FRONT LEFT AND RIGHT If you're only interested in audio and not movies, space the speakers apart approximately the same distance as you sit from them. This means that the included angle is about 60.. This applies whether or not you are using a centre speaker. Apart from the dedicated on-wall model SCMS, the balance of the speaker is more natural if the speakers are at least 0.5, (20-in) from the rear wall. This also helps to improve the impression of perspective. (figure 2) If you are only concerned with 2-channel audio, having the speakers further apart can lead to what is known as the hole-inthe- middle effect, where it's difficult to generate a stable phantom central image. If you have a centre speaker, you can space the left and right speakers further apart. All that happens is that the image widens. It's just like being closer to the performance. If you have to space the speakers further apart because of domestic constraints, the central image can often be improved if you toe the speakers in towards the centre of the listening area. This can also centre line of the installation. (figure 3) If you are also using the speakers for movies, you should try to match the audio image to the size of the screen. That generally means that the speakers should be closer together. A good starting point is to put the speakers about 0.5m (20-in) from the edges of the screen. (figure 4) Bookshelf or on-wall speakers should be placed at a height that brings the tweeters approximately to ear level. In the vertical plane, the dispersion narrows in the crossover region between the midrange and tweeter drive units, when both units are working together. To preserve the optimum sound balance, try to keep within ±5. of this. Floor-standing speakers have the angle of their optimum listening window adjusted for the height of the speakers and the typical range of ear height of seated listeners. f Go to section 3. 2.2 FRONT CENTRE If you have an acoustically transparent screen, place the speaker behind the centre of the screen. Angle it towards the listeners if the tweeter is more than 5. from ear height. (figure 5) If you have a normal screen, place the speaker immediately above or below the screen, whichever is nearest ear height. Angle it towards the listeners if the tweeter is more than 5. from ear height. A stand with tilt adjustment is available for the HTM2D, HTM2S and HTM4S. Consult your dealer for details. (figure 6) If you are just listening to audio, place the speakers centrally and mount bookshelf or wall mount speakers with the tweeters at ear height. (figure 7) f Go to section 3. 2.3 SURROUND Surround speakers generally fall into two main types – those that one might describe as 'normal' speakers – so- called monopoles, where the sound comes from a set of drive units mounted on the front of the enclosure – and those that give a more diffuse sound field, such...

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