Boston acoustics VR-M90, VR-M80 User Manual
Reference Series
High Performance Floorstanding Speakers
VR-M80
VRM80/90 manual v3 11/28/01 12:58 PM Page 1
2
Specifications VR-M90 VR-M80
Frequency Response (±3dB) 36–20,000Hz 42–20,000Hz
Recommended Amplifier Power 50–350 watts 50–250 watts
Nominal Impedance 8 ohms 8 ohms
Sensitivity [1 watt (2.83v) at 1m] 89dB 90dB
Bass Units 2 x 61⁄2
" (165mm) DCD copolymer 2 x 5
1
⁄4
" (135mm) DCD copolymer
Midrange 31⁄2"
(89mm)
Tweeter 1
" (25mm) black anodized 1
" (25mm) black anodized
aluminum dome with AMD aluminum dome with AMD
Crossover Frequency 350, 2500Hz 2500Hz
Dimensions (HxWxD) 371⁄4 x 91⁄4 x 14" (946 x 235 x 357mm) 333⁄4 x 91⁄4 x 12" (857 x 235 x 305mm)
Weight 65 lbs. (29.5kg) 58 lbs. (26.3kg)
Finish Cherry wood veneer with Cherry wood veneer with
cast aluminum baseplate cast aluminum baseplate
Description
The VR-M80 and VR-M90 are monitor-quality floorstanding speakers designed to deliver accurate, natural reproduction,
with an elegant appearance. All the exposed surfaces of the VRM-80 and VR-M90 are clad in a hand-rubbed cherry hardwood veneer. Extra thick, 1
1
⁄8-inch MDF is used for the cabinet side walls, to maximize cabinet rigidity and minimize
coloration. A vertical brace runs the entire height of both cabinets, to further reduce unwanted cabinet resonance. The rearmounted vent is smoothly flared at both ends to reduce port turbulence, and both speakers feature dual gold-plated
binding posts, allowing bi-wiring or bi-amping with virtually any cable.
Special care has been taken to optimize the speakers’ components for maximum performance: The bass units utilize diecast aluminum baskets that keep the critical moving parts in precise alignment for exceptionally accurate response. The
cast baskets also conduct heat away from the voice coil, increasing power handling and maximizing output. The woofer
cones and surround geometry were designed and optimized with Boston’s Finite Element Analysis (FEA) computer
modeling technology, for strong bass and smooth midrange. High frequencies are handled by Boston’s patented 1-inch
(25mm) aluminum tweeter with Amplitude Modification Device
™
(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. All the drive units are designed at Boston’s Peabody, Massachusetts facility using state-of-the-art computer-design
programs, and are built on Boston’s proprietary production lines to an incredible ±1dB—perhaps the industry’s tightest
tolerance. Both systems feature MagnaGuard
®
magnetic shielding for compatibility with home theater systems. A new
3
1
⁄2-inch (89mm) midrange driver is being used for the first time in the VR-M90. Its cast-aluminum basket has an integrated
yoke for its neodymium magnet, assuring extraordinary heat dissipation characteristics. The injection molded polypropylene
cone is molded with the surround, eliminating a glue joint. This reduces the mass of the moving parts of the driver, and
improves power handling and high frequency performance.
The crossovers for the VR-M80 and VR-M90 have been enhanced to maximize sound quality and improve power handling.
An extra-thick glass epoxy printed circuit board supports thicker traces. The connecting wires are 16 gauge, and all
connections are gold plated.
The cast aluminum base plate provides additional coupling of the speaker to the floor, while enhancing its handsome
aesthetic. Each speaker is furnished with height adjustable, rubber capped feet as well as two lengths of carpet spikes. Also
included are gold-plated hex caps, for a more elegant appearance.
VRM80/90 manual v3 11/28/01 12:58 PM Page 2
3
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 it’s important to do it carefully, since incorrect wiring (such as reversed connections) can result in a poor
soundstage and poor bass.
We recommend 16-gauge wire or thicker for runs up to 15 feet (4.5m), and 14-gauge wire or thicker for longer runs.
(see Speaker Cable section on page 5). Separate the first few inches of the wire conductors. Strip off
1
⁄2" (12mm)
of insulation from the ends of each speaker wire to expose the two conductors and tightly twist the wire strands.
WARNING: To prevent electrical shock hazard, always switch off the amplifier or receiver when making connections
to the speaker.
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.
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.
Using the five-way binding posts: The binding posts
permit easy connection to banana plugs, spade lugs,
and bare wire.
Insert the wire in the hole and tighten.
Checking the Speaker Connections
It is important that your speakers are hooked up with similar polarity or “in phase.” A simple listening test will tell
you if your speakers are connected properly. Place the speakers face to face, as closely together as possible. While
listening to music with your amplifier set to MONO, reverse the connections at one speaker only. You’ll hear a
dramatic change in sound. The connection that yields the fuller bass and louder sound is correct.
VRM80/90 manual v3 11/28/01 12:58 PM Page 3
Loading...