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850 Mono Power Amplifier
Boulder’s classic design in a new package
The 850 Mono Power Amplifier is immediately
recognizable as a Boulder, sharing a visual likeness
with its predecessors while still maintaining its own
unique identity. Drawing technology from Boulder’s
1000 and 2000 series, the 850 maintains the highest
standards of quality and reliability yet makes
unequalled Boulder performance available to an
entirely new audience.
The all analog Boulder 850 avoids the sonic
problems of switching amplifiers such as noise
radiation, dynamic limiting, and IM distortion.
An elegant chassis houses one channel, thus
making a pair suitable for traditional stereo
listening or a complete multi-channel home theater.
Boulderlink and a 12V trigger enable the 850 to be
connected to a home automation system or any
Boulder preamplifier.
The 850 is completely designed and manufactured
in Boulder, Colorado. Metalwork is fabricated in-house
on CNC machining centers, assuring the strictest
quality control and oversight of every detail.
Meticulously engineered and refined, the 850
delivers high power into any load while preserving
the renowned Boulder sound quality.
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Inside the Boulder 850 Mono Power Amplifier
12 Output transistors
provide stable operation
with any loudspeaker
Dampened heatsinks
are an integral part of
Boulder’s unique chassis
Multiple gain stages
provide most of the gain
in the first stage thus
maximizing bandwidth
6 filter capacitors
assure a low impedance,
distributed power supply
Encapsulated and
magnetically shielded
power transformers for
quietest performance
Easy to connect, rugged, high current, speaker terminals
require no tools
Advanced protection
circuits provide troublefree operation
Supervising
microprocessor oversees
all functions and
communicates with other
Boulder products
SPECIFI CATIONS
OUTPUT POWER 200W / 8,4,2 Ohms
PEAK POWER 40 0W / 4,2 Ohms
THD & NOISE 20 TO 2kHz: .0016%, 20kHz: .009%
FREQ RESPONSE -3 dB @ 0.015Hz, 150kHz
VOLTAGE GAIN 26 dB
INPUT IMPEDANCE
INPUT CONNECTORS
SYSTEM Boulderlink, 12V Trig ger
SIZE 8.50 wide, 7.38 high, 15.25 deep (in.)
WEIGHT 29, Shipping: 34 Pounds
POWER 800 W Max
32 35 P rai rie Ave. • Boulder, CO 8 030 1
30 3-4 49- 822 0 • www.boulderam p.com
Bal: 50k, Unbal: 25k Ohms
3 Pin Balanced
Bo uld er A mpl ifiers, Inc.
Boulderlink allows
multiple 850s to be
sequentially turned on,
and transmit their status
to the display on a
Boulder preamplifier
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