Évaluations - 3, GPA: 4
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Facilité d'utilisation
To find the optimum position in the room may involve a certain amount of experimentation, but as an initial guide: • Position the speakers and the centre of the listening area approximately at the corners of an equilateral triangle. • Keep the speakers at least 1.5m apart to maintain left-right separation. The proximity of the speakers to walls affects the sound quality.See the section“Fine Tuning” below. Stray magnetic fields The speaker drive units create stray magnetic fields that extend beyond the boundaries of the cabinet. We recommend you keep magnetically sensitive articles (television and computer screens, computer discs, audio and video tapes, swipe cards and the like) at least 0.5m from the speaker. Connections (figure 3) All connections should be made with the equipment switched off. 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. Do not remove the pins if you are using the product where these conditions apply. There are 2 pairs of terminals at the back of the speaker to permit bi-wiring. The lower pair feed the bass/midrange drive unit and the upper pair feed the tweeter. The terminals are insulated to prevent any likelihood of electrical shock, even when the speakers are used with the highest powered amplifiers, and accept a variety of cable termination to suit most applications. Bi-wiring is the preferred method of connection and involves the use of separate cables from the amplifier to each pair of terminals. The separation of the signal paths improves the resolution of low- level detail and allows the user to optimise the type of cable to the frequency range of use. 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. 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. Incorrect connection can result in poor imaging and loss of bass. When bi-wiring, do not use the linking cables. Take extra care with the polarity of the connections as incorrect connection can also impair the frequency response through the bass-midrange crossover and, if the links are left in place, may cause damage to the amplifier by shorting its output terminals. Fine tuning Before fine tuning, double check that all the connections in the installation are correct and secure. Moving the speakers further from the walls will reduce the general level of bass. Space behind the speakers also helps to create an impression of depth. Conversely, moving the speakers closer to the walls will increase the level of bass. If the bass is uneven with frequency it is usually due to the excitation of resonance modes in the room. Even small changes in the position of the speakers or the listeners can have a profound effect on how these resonances affect the sound. Try mounting the speakers along a different wall. Even moving large pieces of furniture can have an effect. If the central image is poor, try moving the speakers closer together or toeing them in so they point at or just in front of the listeners. (figure 4) 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. Ensure the speaker stands are firm on the floor. If you have a carpet, use carpet- piercing spikes and adjust them to take up any unevenness in the floor. For the most discerning listening, remove the cloth covered grille as described below in the section “Aftercare”. The tweeter is very delicate and its grille should be left in position for protection. For this reason the grille retaining ring is designed to provide the optimum acoustic environment for the unit and the response is less smooth with the grille removed. Running-in period The performance of the speaker will change subtly during the initial listening period. If the speaker has been stored in a cold environment, the damping compounds and suspension materials of the drive units will take some time to recover their correct mechanical properties. The drive unit suspensions will als...