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Фрагмент инструкции
A clamp ring and four clamp screws hold the foot bracket to the speaker. Mount the foot bracket to a wall or ceiling using screws through the two holes in the foot bracket. Removing the foot bracket from the speaker may make mounting easier. After mounting, aim the speaker on its ball/swivel mount by loosening the clamp screws, adjusting the speaker, and retightening the screws. Be sure that both the fasteners and the mounting surface can safely support the weight of the speaker, especially in earthquake prone regions. Setting up and installing home cinema systems The three-dimensional drawing on Pg.11, (Fig. 1), shows a typical configuration for a home cinema setup in a living room, using two floor-standing speakers and a special center speaker as the front speakers. Please study the manufacturers’ instruction manuals carefully before connecting the equipment. Bi-wiring and bi-amping In conventional systems, the speaker connection cables carry all the frequencies together. The bass signals have much more power, however, this can cause losses in overall sound quality. “Bi-wiring,” which means dividing the signal and using one set of cables for the high frequencies and another for the low frequencies, can bring an audible improvement in sound quality. “Bi-amping” goes one step further by using separate amplifiers as well as separate cables for the high and low frequency ranges. This method eliminates sound losses caused by the widely-different current levels in the lower and upper ranges by separating the signals right from the very start. Some AR speakers have specially designed connection terminals that can be used both for conventional operation and for bi-wiring/bi-amping. This means that if you wish, you can use separate connections for the woofer and the mid/tweeter units. There are four screw terminals on each speaker: the top two are for the mid-range and tweeter units, the bottom two for the woofers. When the speakers are delivered from the factory, the upper and lower terminals are connected with jumpers for operation in conventional mode (see Pg. 14, Fig. 1). If you just wish to use one cable, simply leave the jumpers in place and connect the cable to either the upper or the lower terminals - which pair you use makes no difference. If you wish to operate the speakers in bi-wiring/bi-amping mode, you must first remove the two jumpers from each speaker. For bi-wiring (Pg.14, Fig. 2) you need two cables for each speaker and amplifier channel, or a special biwiring cable. Connect the two cables to the amplifier outputs in parallel - i.e., connect both positive 11 4 leads to the positive output terminal and both negative leads to the negative output terminal. Then connect the other ends of one cable to the mid/tweeter terminals and those of the other cable to the woofer terminals on the speaker. Taking care to maintain proper polarity of both sets of wires. A bi-amping setup uses two amplifiers (Pg.14, Fig. 3), with the first handling the mid and high range frequencies and the second the low range frequencies. The correct connections are very important: Connect the left output of the first amplifier to the upper terminals of the left speaker. Proceed in the same way to connect the outputs of the second amplifier to the lower terminal pairs on the speakers. Only use tone controls when absolutely necessary You will get the best sound from your speakers when all tone controls are in the middle position. This neutral setting enables the speakers to reproduce the music absolutely naturally and without distortion. AR speakers are designed to produce optimum sound without any bass or treble modifications. WARNING: If you turn the tone controls too far at high volumes you may actually cause irreparable damage to the tweeters or woofers! Use the volume control with care You can also damage the speakers by using an amplifier whose power significantly exceeds the rated capacity of the speakers. In practice, however, this kind of damage is actually very rare. Surprisingly, weak amplifiers connected to speakers with a high power rating pose a much greater risk. In such a configuration it is quite possible to overdrive the music signal, even at medium volumes. This results in audible and measurable distortions, which cause excessive mechanical stresses that will ultimately destroy the speakers. Always remember that the power rating of your speakers is for clear music signals, not for distortion! It is thus very important to match the output power of your amplifier to the capacity of your speakers. Always take care to adjust the volume so that there is no audible distortion. If you like listening to music at high volumes, ensure that the output power of your amplifier is at least as high as the capacity of your speakers. CD’s with “extended bass” If the label of a CD indicates that it features “extended bass,” this means that the recording includes subsonic frequencies below 30Hz. When played at high volumes these si...