Boulder 2150 Monoblock Power Amplifiers (Pair)

Boulder 2150 Monoblock Power Amplifiers (Pair)

The 2150 Mono Power Amplifier is the beneficiary of 30 years of amplifier design. It replaces the renowned 2050 Mono Power 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 and as a result earned Stereophile magazine’s Amplification Product of the Year award. After all, we don’t aspire to benchmarks. We outdo them.

Features:

• Boulder's most powerful continuously manufactured amplifier: 1000W into any load
• 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
• Full Class-A biasing actively managed with an analog circuit that reduces heat and improves efficiency
• 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

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  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

  WEIGHT

  Amplifier: 220 lbs. (99.8 kg),
  Shipping: 319 lbs. (144.7 kg)

  POWER REQUIREMENTS

  100, 110-120, 220-240 VAC, 50-60 Hz
  250W nominal, 5000W at maximum output

  AMPLIFIER TOPOLOGY

  Pure Class A to full rated output