2
Specifications
VR-M60
VR-M50
Frequency Response (±3dB)
51–20,000Hz 59–20,000Hz
Recommended Amplifier Power
15–200 watts
15–150 watts
Nominal Impedance
8 ohms
8 ohms
Sensitivity [1 watt (2.83v) at 1m]
90dB 89dB
Bass Unit
6
1
⁄
2
"
(165mm) DCD copolymer
5
1
⁄
4
"
(135mm) copolymer
Tweeter
1
"
(25mm) black anodized
1
"
(25mm) black anodized
aluminum dome
aluminum dome
Crossover Frequency
2700Hz 3100Hz
Dimensions (HxWxD)
11
3
⁄
4
x 8
5
⁄
16
x 11
7
⁄
8
" (299 x 212 x 303mm)
9
7
⁄
8
x 7
1
⁄
8
x 9" (251 x 181 x 230mm)
Weight
17 lbs (8kg)
12 lbs (5.5kg)
Finish
Cherry or black ash wood veneer with
Cherry or black ash wood veneer with
glossy gray top panel
glossy gray top panel
Description
The VR-M50 and VR-M60 are compact, monitor-quality speakers designed to deliver accurate, natural reproduction,
with an elegant appearance.
Special care has been taken to optimize the speakers’ components for maximum performance: The bass units uti-
lize die-cast 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 exclusive 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 aluminum heatsink attached to the tweeter’s backplate dissipates heat quickly and efficiently,
assuring cool, trouble-free operation, even at very high power levels.
The drivers are positioned very closely to each other for smooth, uniform radiation in both the horizontal and verti-
cal planes. Inside the cabinets are heavy ”window-pane” braces to assure strength and rigidity, while minimizing
cabinet resonances. The rear-mounted 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.
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.
VRM50/60 mnl 6/23/99 ƒ 9/9/99 12:03 PM Page 2
