Boston Acoustics Speaker System 2 User Manual

V
VR1, VR2, VR3  
V
VRB, VRC  
High Performance Home Theater Loudspeakers  
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The second benefit is smoother, more uniform upper bass/lower midrange frequency response in a real listening room.  
The dimensional relationship of the woofer to the nearby room boundaries (the walls and floor) in any speaker results in  
a reinforcement or cancellation of upper bass/lower midrange frequencies corresponding to the woofer-to-boundary dis-  
tances. By placing the cabinets two woofers at optimally chosen different locations, these dimensions are "averaged" over  
a wider variety of distances, thereby reducing the influence of any single woofer-to-boundary dimension. The result is much  
smoother, more accurate in-room frequency response, with far less of the typical "peak and dip" characteristic found in  
conventional designs.  
The 3-way models utilize a newly-developed 412-inch (115mm) midrange driver with a large 112-inch voice coil for superb  
driver control and extremely high power handling. Its powerful neodymium magnet produces 10 times more magnetic  
energy than a conventional magnet of the same size, but its compact dimensions allow the tweeter and midrange to be  
mounted very close together for seamless, perfectly integrated sound with wide, uniform dispersion. A high output 1-inch  
(25mm) anodized aluminum VR tweeter, with our exclusive patented Amplitude Modification Device (AMD) produces extend-  
ed, sparkling high frequencies.  
The cabinets have extensive internal bracing and are constructed of Medium Density Fiberboard (MDF), chosen for its favor-  
able acoustic characteristics. The result is superb structural integrity that eliminates the spurious resonances and vibration  
that degrade the sound of ordinary speakers.  
MagnaGuard® magnetic shielding ensures the speakers’ magnetic field does not interfere with the televisions picture, allow-  
ing placement next to a TV in a home theater system.  
How to Connect Your Speakers  
Correctly wiring your speakers is important for achieving the best sound quality. Wiring should take just a few  
minutes, but its important to do it carefully, since incorrect wiring (such as reversed connections) can result in a poor  
soundstage and poor bass.  
We recommend 18-gauge wire or thicker for runs up to 25 feet (8m), and 16-gauge wire or thicker for longer runs.  
Separate the first few inches of the wire conductors. Strip off 12" (12mm) of insulation from the ends of each speaker  
wire to expose the two conductors and tightly twist the wire strands.  
When making all connections, be sure to connect the + (red) on the speaker to the + (red) on the amplifier, and the –  
(black) on the speaker to the (black) on the amplifier.  
WARNING: To prevent electrical shock hazard, always switch off the amplifier or receiver when making connections  
to the speaker.  
Using the five-way binding posts: The binding posts  
permit easy connection to banana plugs, spade lugs,  
and bare wire.  
IMPORTANT: Typically, one side of the wire is smooth.  
Connect this side to the (black) connection. The  
other side has a rib or stripe. Connect this to the  
+ (red) connection.  
Insert the wire in the hole and tighten.  
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Connecting the Speakers to Your Amplifier or Receiver  
Basic Hookup  
1. Connect the speaker terminals to the amplifier speaker outputs.  
2. 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  
VR2 or VR3  
VRC  
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. Unscrew both sets of terminals and remove the jumper straps.  
2. Connect the wires from the amplifiers speaker terminals  
VR2 or VR3  
to each individual set of terminals on the back of the speaker as shown.  
Remove jumper  
straps  
amplifier or receiver  
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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).  
1. Unscrew the terminal collars of both sets of terminals and remove the jumper straps.  
2. Connect the wires from the bottom set of terminals to the amplifier driving the woofers.  
3. 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 VRs  
internal crossover can interact and distort the phase and frequency response of the system.  
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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. The speakers should also be at least 2 feet (0.6m) from the corners of the room. Putting  
the speakers too close to a corner can produce an unnatural bass reinforcement that detracts from their balanced, uncol-  
ored sound. For optimal bass performance when a speaker must be placed in or near a corner, position it so that the dis-  
tance to the side wall is different than the distance to the rear wall.  
Most people like to hear a realistic soundstage, as they would from a good seat in a concert hall. To achieve this effect, place  
the speakers 6 to 12 feet (2-4m) apart, so they form a triangle with your favorite listening position. If your listening position  
happens to be less than the distance that the speakers are apart, then you may prefer to “toe-in” the speakers slightly.  
Place the VRC center channel speaker as shown below, with the front of the speaker flush with the front of the television.  
The VRC is specially tuned to sit atop of a large, flat TV screen. This is quite important, since the TV screen surface acts as  
a large baffle that can alter a speakers sound, degrading both dialogue and music. Four self-adhesive rubber feet are pro-  
vided to protect the TVs nish and prevent vibration.  
Boston  
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Listening Room Considerations  
The listening rooms dimensions, furnishings and wall types all contribute to the way a loudspeaker sounds. If your room  
is square (same length and width), you may experience low frequency standing waves that can reduce overall clarity.  
Experiment with different placements and toe-in to avoid this. Also, the more fabric material there is in a room (curtains,  
sofas, carpets, etc), the more that high and midrange frequencies will be dampened. Conversely, the more exposed bare  
walls there are in the room, the brighter the speakers will sound. Thus, you may also want to experiment with speaker place-  
ments with these considerations in mind.  
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Using the Carpet Spikes  
For placing speakers on thick carpet, we recommend using the four threaded carpet spikes and lock nuts (VR2  
and VR3 only) which serve three purposes — leveling (an aesthetic issue), stability (a practical issue) and rigidity  
(an acoustic issue). The spikes concentrate the speakers weight on four points, creating focused pressure that  
anchors the speaker cabinet to the floor and enhances rigidity. For most carpeting, leaving about 12-inch (12mm)  
of the carpet spike exposed is sufficient, although this may be adjusted as necessary.  
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. This finish should be treated like  
any other piece of fine furniture. To clean, simply wipe lightly with a slightly damp cloth. Do not use abrasive clean-  
ers, 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. Even  
these rugged speakers can be damaged by a modest amplifier if it produces distortion. If you hear a harsh, gritty noise,  
turn the volume down. Prolonged or repeated operation of your speaker with a distorted signal from the amplifier can  
cause damage that is not covered by the warranty.  
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AMD is a trademark and DCD, VR, MagnaGuard,  
Boston, and Boston Acoustics are registered  
trademarks of Boston Acoustics, Inc.  
© 2004 Boston Acoustics, Inc. All rights reserved.  
Specifications subject to change without notice.  
300 Jubilee Drive  
Peabody, MA 01960 USA  
978.538.5000  
042-001728-1  
bostonacoustics.com  
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