2150

Mono Power Amplifier

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.

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

Specs

2150
Mono Power Amplifier
  • 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