User manual BOSTON ACOUSTICS VR-M90

[. . . ] High frequencies are handled by Boston's patented 1-inch (25mm) aluminum tweeter with Amplitude Modification DeviceTM (AMD). This remarkable driver produces an extremely smooth, flat response well beyond the audible range. A die-cast, multi-finned aluminum heatsink attached to the tweeter's backplate dissipates heat quickly and efficiently, assuring cool, trouble-free operation, even at very high power levels. [. . . ] You'll hear a dramatic change in sound. The connection that yields the fuller bass and louder sound is correct. 3 VRM80/90 manual v3 11/28/01 12:58 PM Page 4 Connecting the VR-M80 or VR-M90 to Your Amplifier or Receiver Basic Hookup 1. Connect the speaker terminals to the amplifier speaker outputs. Make sure the speaker terminal jumper straps are in place on the back of the speaker. When making all connections, be sure to connect + to + (red) and ­ to ­ (black). speaker terminal with jumper strap in place amplifier or receiver Bi-wiring Bi-wiring increases the flow of current and decreases intermodulation of different frequencies by providing separate inputs to the woofer and midrange/tweeter sections. Bi-wiring will usually improve the sound quality, although the improvement may be quite subtle. If you choose to bi-wire, use the same type and length of wire for all connections. When making all connections, be sure to connect + to + (red) and ­ to ­ (black). 1. Unscrew both sets of terminals and remove the jumper straps. Connect the wires from the amplifier's speaker terminals to each individual set of terminals on the back of the speaker as shown. amplifier or receiver 4 VRM80/90 manual v3 11/28/01 12:58 PM Page 5 Bi-amplification Bi-amplification requires using separate amplifiers dedicated to high and low frequencies. Using more than one amplifier can enhance the dynamic performance of your system. "Splitting the load" between two amplifiers lets each amplifier work less hard, increasing the available current to the drive units. When making all connections, be sure to connect + to + (red) and ­ to ­ (black). Unscrew the terminal collars of both sets of terminals and remove the connector straps. Connect the wires from the bottom set of terminals to the amplifier driving the woofers. Connect the wires from the top set of terminals to the amplifier driving the midrange/tweeter. right speaker left speaker low frequency amplifier high frequency amplifier CAUTION: Do not use an external active crossover with your VR-M speakers. The external crossover and the VR-M's internal crossover can interact and distort the phase and frequency response of the system. Speaker Cable You should always use high quality speaker cable for optimum audio results. The thickness or gauge of the cable is equally important. [. . . ] The process is the same using the spikes except there is no hex nut, thus the included wrench will not be used. Instead, the spike features a knurled surface at the end of its threaded section to facilitate screwing it in or out using your fingers. IMPORTANT: Whether you use the rubber capped feet or the carpet spikes, be sure to remove the decorative gold-plated hex cap nuts before you make your adjustments. [. . . ]