User manual BOSTON ACOUSTICS VRC

[. . . ] All three VR floorstanding models feature dual woofers for deep, authoritative bass response and low distortion. The placement of the woofers on the baffle has been chosen with extreme care and precision, and it provides two very specific, clearly audible benefits: First, by separating the woofers by a precisely calculated distance, the internal "pipe organ" standing wave--common to all columnar-type enclosures that have their bass drivers closely grouped at one end of the cabinet--is reduced to the point of audible insignificance. The result is less midrange coloration and a commensurate increase in clarity and detail. 2 The second benefit is smoother, more uniform upper bass/lower midrange frequency response in a real listening room. [. . . ] Make sure the speaker terminal jumper straps are in place on the back of the speaker. (VR2 and VR3 only) IMPORTANT: When making all connections, be sure to connect + to + (red) and ­ to ­ (black). VR1/VRB VRC VR2 or VR3 Speaker terminal jumper straps in place left front center front right front surround sound receiver or amplifier Bi-wiring (VR2, VR3 only) 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. Connect the wires from the amplifier's speaker terminals to each individual set of terminals on the back of the speaker as shown. VR2 or VR3 Remove jumper straps Remove jumper straps 4 amplifier or receiver Bi-amplification (VR2 and VR3 only) 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 jumper 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 VR2 or VR3 left VR2 or VR3 Remove jumper straps low-frequency amplifier high-frequency amplifier CAUTION: Do not use an external active crossover with your VR speakers. The external crossover and the VR's internal crossover can interact and distort the phase and frequency response of the system. 5 How to Place Your Speakers The VR speakers were designed to deliver exceptional bass extension and tonal balance, regardless of where they are placed. However, for optimal results, it is advisable to position the rear of the speaker to be at least 3 inches (76mm) away from the wall or curtains that are behind it. [. . . ] For placing the speakers on hard, flat surfaces, use the four circular self-adhesive rubber pads provided instead of the carpet spikes. or Mounting the VRB to a Speaker Stand The VRB features a 1/4"-20 threaded insert on the bottom panel, so it can be securely bolted to any accessory speaker stand that offers this feature. Bolting the speaker to the stand reduces unwanted vibration and reduces the possibility of the speaker accidentally falling off the stand. Caring for Your Speakers The cabinet of your VR Speaker system is finished in furniture-grade vinyl veneer. Do not use abrasive cleaners, solvents, wax, oil or furniture polish. Listening Levels and Power Handling The listed power recommendations assume you will operate your system in a way that will not produce distortion. [. . . ]