Bowers & Wilkins manual Installing CCM7 Series Speakers, Multi-channelAudio Applications

4. Installing CCM7 Series Speakers

Multi-channel Audio Applications

For applications where multiple CCM7 Series speakers are to be used for multi-channel audio visual systems, the centre speaker should be on the centre line of the screen and the front speakers each laterally within approximately 0.5m (20 in) of the sides of the screen. Surround channel CCM7 Series speakers should be located just behind and either side of the listening position. Try to avoid corner locations for any of the speakers and to ensure that acoustic environment around each front and surround speaker is similar. The diagram above illustrates this application.

Note: Different acoustic environments might be, for example, a bare wall and a heavily curtained window.

In all cases CCM7 Series speakers should be oriented so that their tweeters face generally towards the listening area. Speaker orientation is defined by the installed orientation of the back box. See Section 4.

Note: CCM7 Series speaker dispersion can be adjusted to accommodate use in centre or left, right and surround channel roles. The dispersion is adjusted via a switch on the cross-over. See Paragraph 4.7 for more information.

Note: The nature of the installation of ceiling speakers means that it is sometimes impractical to locate them in the acoustically ideal positions. In these cases they should be located as close as is practical to the ideal positions. Your local Bowers and Wilkins retailer will be able to offer advice if required.

Note: CCM7 Series drive units create stray magnetic fields. We recommend that magnetically sensitive items such as CRT screens and magnetic cards for example, are kept at least 0.5m (20 in) from the speaker. LCD, OLED and plasma screens are not affected by magnetic fields.

To install a CCM7 Series speaker proceed as described in the following paragraphs:

4.1Using the supplied cut-out template, mark a cut line on the existing ceiling. Check the cut line defines the correct 332mm x 332mm dimensions. Cut along the line with an appropriate tool to create a square aperture in the ceiling.

Note: Ensure that there is enough free space internally adjacent to the aperture for the back box clamps to rotate fully. 20mm (0.79 in) free space is required.

Note: To reduce the possibility of the ceiling buzzing or rattling, adhesive mastic can be applied between the studs and sheetrock in the vicinity of the speaker aperture.

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