User manual B&W 800 ASW

[. . . ] Here is a short summary of what you will find new to this Series. bass cones throughout now feature a sandwich construction of carbon fibre skins bonded to a Rohacell foam core. Rigid diaphragms are best for reproducing bass frequencies and this new construction allows us to thicken the cone section, without suffering increased mass. The extra thickness makes the cone a more effective barrier to any residual sound generated inside the cabinet, giving tremendous dynamics and timing to the bass, with the secondary effect of cleaning up the midrange. [. . . ] this is as illustrated on the separate sheet placed in the carton. Screw in the feet with locking ring attached, with either the spikes or rubber tips outermost, according to the type of For best performance, screw the adjustable feet into the threaded inserts in the base of the speaker as appropriate ­ spikes for carpets or clear rubber for wooden and other vulnerable floors. (figure 25) Lay the speaker down on its side (to avoid possible damage to terminals or drive unit diaphragms). The terminals accept a variety of cable terminations to suit most applications ­ 4mm banana plugs, 6mm and 8mm (1/4 in and 5/16 in) spades, or bare wires up to 6mm (1/4 in) diameter. Important safety notice In certain countries, notably those in Europe, the use of 4mm banana plugs is considered a potential safety hazard, because they may be inserted into the holes of unshuttered mains supply sockets. In order to comply with European CENELEC safety regulations, the 4mm holes in the ends of the terminals are blocked by plastic pins. If you are using the products in any country where these conditions apply, you should ensure that any banana plugs cannot be used in an unsafe manner by children or other uninformed persons. ensure each positive terminal on the speaker (coloured red and marked +) is connected to the positive output terminal of the amplifier and negative (coloured black and marked -) to negative. Incorrect connection may result in impairment of frequency response, poor imaging and loss of bass. Always screw the terminal caps down fully to prevent rattles. The speakers may be fixed to a wall or ceiling using screws in the range 5mm to 6mm diameter (No. B&W can accept no liability for any failure of wall or ceiling fixings. Screw the wall plate D to the wall and test the firmness. Part screw two of the supplied machine screws into the upper two threaded inserts in the back of the cabinet. Offer the speaker up to the speaker plate E, locating the two screw projecting from the back of the speaker into the slots at the top of the plate. Fit the remaining two machine screws through the plate E into the lower All models in the range except for the DS8S may be bi-wired or bi-amplified. Separation of the signal paths to each section of the speaker can improve imaging and the resolution of low-level detail, and allows the user to optimise the cable to the frequency range of use. Bi-wiring involves the use of two separate 2-core cables from the same amplifier, one to each pair of terminals. This is the minimum we would recommend, but should you prefer to single wire, perhaps during the initial setup procedure or because you do not want to see a multitude of cables in the room, you must connect both positive and both negative speaker terminals together. The ear is at its most sensitive in the midrange, so we recommend that, when single wiring, you connect the cable from the amplifier to the terminals that directly feed the midrange driver. Bi-amplification goes a stage further and involves the use of two separate power amplifier channels for each speaker. It is not the same as having a fully active system, because the speaker's internal passive crossover is still used. [. . . ] We have chosen the finest wood veneers for the surface of the cabinet, but please be aware that, like all natural materials, the veneer will respond to its environment. Keep the product away from sources of direct heat such as radiators and warm air vents to avoid the risk of cracking. The wood is treated with an ultra-violet resistant lacquer to minimise changes in colour over time, but a degree of change is to be expected. This effect may be particularly noticeable where the area covered by the grille, or areas kept in shadow, change more slowly than other areas. [. . . ]