User manual B&W SIGNATURE SCM

[. . . ] (figure 2) Should you not want to bi-wire, perhaps during the initial set-up procedure or because you do not want to see a multitude of cables in the room, short cables are provided to link both positive and both negative speaker terminals together. (figure 3) When using the links, insert the spade into the slot in the side of one terminal and the crimped pin into the round side hole in the other. There is enough clearance to insert a spade connector from the amplifier into the same terminal as the crimped pin. ensure each positive terminal on the speaker (coloured red) is connected to the positive output terminal of the amplifier and negative (coloured black) to negative. [. . . ] Image stability depends on getting the right balance between all five speakers and the `hot spot' effect is even more marked than for 2-channel audio. With this in mind, your success in recreating the producer's intentions for the surround field will depend to a great extent on domestic constraints ­ how free you are to position the speakers in an ideal position and how large an audience you want to cater for, relative to the size of the room. There is no industry standard for the angle subtended by the surround speakers at the listening position, but most recordings are made with the surround speakers positioned between 110° and 130° from front centre. Place the speakers against the wall within this range of angles, initially on a temporary support that raises the tweeters approximately to ear height. This will define whether you position the speakers on the side or rear wall. (figure 4) The wall bracket will allow the speaker to be rotated horizontally up to 45°. If you listen in high-backed chairs, or if the speakers are otherwise obscured, it may be advantageous to raise them higher. Satisfactory results can be obtained with them up to approximately 60cm (2 feet) above ear height. With all speakers positioned for initial listening tests, listen to a wide variety of programme material ­ 5. 1 channel audio, action and small scale movies ­ and sit in all likely listening positions. pay particular attention to the surround information and the stability of the images. If the imaging is unsatisfactory, for example if it becomes too one sided at the extremes of the listening area, or if you cannot place the speakers within the preferred range, you may be better off aiming for a more diffuse sound field. Try changing the angle of the speakers so they point away from the listening area. It may also be advantageous to raise the speakers well above ear height. (figure 5) Once you have found the optimum position, fix the speaker permanently in position (see below). As a front centre speaker: If using a projection television with an acoustically transparent screen, place the speaker behind the centre of the screen. Otherwise position it directly above or below the screen, whichever is closest to ear level. If the centre speaker is behind an acoustically transparent screen, position the left and right front speaker as nearly as possible at the same height. If the centre speaker is above or below the screen, the height of the left and right speaker should be between the height of the centre speaker and the centre of the screen. adjust the angle of the speakers to achieve the most realistic and stable image. For greatest realism in home theatre installations it is important to balance the speakers and adjust the acoustic image to match the size of the screen. With smaller screens it may be more realistic to have the left and right speakers closer together than you might for audio alone. [. . . ] If the sound is too harsh, increase the amount of soft furnishing in the room (for example use heavier curtains), or reduce it if the sound is dull and lifeless. Test for flutter echoes by clapping your hands and listening for rapid repetitions. Reduce them by the use of irregular shaped surfaces such as bookshelves and large pieces of furniture. For the most discerning listening, remove the cloth covered grille as described below in the section `Aftercare'. [. . . ]