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Power amplifiers mono — Boulder 851

Description, images, technical data and specifications

Boulder 851
Image source — © Boulder

The Boulder 851 monoblock power amplifier relies heavily on the solutions used in the 861 stereo amplifier. The novelty provides a power of 100 watts per channel when operating on a load with a nominal resistance of 8 ohms and 200 watts at 4 ohms, and the peak output when the impedance drops to 2 ohms reaches 350 watts.

Specifications

  • Model name

    851

  • Input sensitivity (mV)

    N/A

  • Input impedance (balanced) (Ω)

    100 000

  • Input impedance (single-ended) (Ω)

    N/A

  • Output impedance (balanced) (Ω)

    N/A

  • Output impedance (single-ended) (Ω)

    N/A

  • Max current (A)

    N/A

  • Output power (8Ω) (W)

    150

  • Output power (4Ω) (W)

    250

  • Gain (dBu)

    28

  • Frequency response low +/- 3dB (Hz)

    20

  • Frequency response high +/- 3dB (Hz)

    20 000

  • Signal to Noise Ratio (dB)

    N/A

  • Total Harmonic Distortion + Noise (0% global feedback) (%)

    N/A

  • Total Harmonic Distortion + Noise (100% global feedback) (%)

    0.002

  • Max power consumption (W)

    550

  • Damping factor

    N/A

  • Dimensions (mm)

    304,8 × 304,8 × 88,9

  • Weight (kg)

    10

  • Official link

    https://boulderamp.com/products/851-mono-power-amp/

Boulder 2150

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