Boulder – 2150 monoblock (pair)
The 2150 Mono Amplifier is the beneficiary of 30 years of amplifier design.
It replaces the renowned 2050 Mono Amplifier, a benchmark product that stayed in continuous production
for almost 18 years. Having the perfect template to build on, we analyzed, improved,
and evolved the 2150 into something much greater than its predecessor. It outperforms it in every way.
After all, we don’t aspire to benchmarks. We outdo them.
Boulder’s most powerful continuously manufactured amplifier: 1000W into any load.
Full Class-A biasing actively managed with an analog circuit that reduces heat and improves efficiency.
Computer designed surface-mount circuit boards secured in custom-machined frames,
each damped to eliminate mechanical distortion.
Dual toroidal transformers, potted and installed in a welded steel enclosure: transformer hum is not permitted.
Boulder Link for turn-on and turn-off of amplifiers and to send status messages to the display of any Boulder preamplifier.
12V trigger connection for remote turn-on by most surround-sound processors and control systems.
Two 99H2 gain stages (one for + audio and one for – audio), a third-generation descendent of the 990 gain stage
used in recording and broadcast studios world-wide.
Supervisor board monitors and controls all aspects of the amplifier’s operating status.
Dual gain stage design maximizes bandwidth by incorporating the majority of gain in the first stage.
Designed as a fully-balanced, true monaural amplifier for ideal loudspeaker interface.
Massive instant power delivery and damping from 80 bipolar output transistors.
Dual speaker connections via easy to connect, high-current speaker terminals to accommodate bi-wired loudspeakers.
2150 – Specification:
PEAK POWER, 8 OHMS – 1000W
PEAK POWER, 4 OHMS – 2000W
PEAK POWER, 2 OHMS – 4000W
THD, 8 OHMS, 1000W – 20-2 kHz: 0.0008%, 20 kHz: 0.0035%
THD, 4 OHMS, 1000W – 20-2 kHz: 0.0009%, 20 kHz: 0.0045%
THD, 2 OHMS, 1000W – 20-2 kHz: 0.0014%, 20 kHz: 0.0090%
FREQUENCY RESPONSE – -3dB @ 0.015 Hz, 200 kHz
EQUIVALENT INPUT NOISE (EIN), 20 KHZ BW – 1.5 μV
MAGNITUDE RESPONSE, 20 TO 20 KHZ – +0.00, -0.04 dB
MAGNITUDE RESPONSE, -3 DB AT – 0.015 Hz, 200 kHz
VOLTAGE GAIN – 26 dB
INPUT IMPEDANCE – Balanced: 200kΩ, Unbalanced 100kΩ
COMMON MODE REJECTION (BALANCED ONLY) – 60 Hz: 90 dB, / 10 kHz: 70 dB
INPUTS – 3-pin balanced XLR
OUTPUT CONNECTORS – 2 sets of 6 mm / .250-inch wingscrews
POWER REQUIREMENTS – 100, 110-120, 220-240 VAC, 50-60 Hz, 250W nominal, 5000W at max. output
WEIGHT – Amplifier: 220 lbs. (99.8 kg), Shipping: 319 lbs. (144.7 kg)