Stereo Power Amplifier

The art of technological progress, beautifully expressed in the art of visual design, in an amplifier of truly remarkable ability. Let us present to you the Boulder 1160 Stereo Power Amplifier, recognized by media and editors in the US, Taiwan, France, China, England, Japan, Poland, Hong Kong, and Italy with eleven awards for exceptional ability. Awe-inspiring and modern, yet staying true to Boulder’s long-standing guiding principle: maximize performance. Every circuit has been refined and every mechanical detail has been optimized. Everything about the 1160 is executed to a spectacularly high standard. As a result, it is exactly what you would expect: brilliant.


  • 300 watts of output power can drive any reasonable loudspeaker to realistic levels

  • Machined front panel depicts the topography of Flagstaff Mountain near Boulder, Colorado

  • Improved thermal management reduces temperature while operating

  • Ethernet-enabled supervisor circuitry monitors amp, protection systems, and IP and HTML control

  • New grounding system and fully-balanced circuit design improve clarity and reduce distortion

  • Robust output section using 56 output transistors means excellent reliability, control, and power with any loudspeaker

  • Dual power transformers are DC filtered and enclosed a welded steel case for perfectly silent operation

  • Boulder Net control access connects to networked systems & integrated homes and links the 1160 with other Boulder products

  • Boulder's 983 gain stage combines discrete and monolithic design for excellent sound quality


Stereo Power Amplifier
  • Continuous Power; 8, 4, 2 Ohms


  • Peak Power, 8 Ohms


  • Peak Power, 4 Ohms


  • Peak Power, 2 Ohms


  • THD, 8 Ohms, 300W

    20-2 kHz: 0.0009%, 20 kHz: 0.0048%

  • THD, 4 Ohms, 300W

    20-2 kHz: 0.0016%, 20 kHz: 0.0071%

  • THD, 2 Ohms, 300W

    20-2 kHz: 0.002%, 20 kHz: 0.0130%

  • Equivalent Input Noise (EIN), 20 kHz, BW

    1.5 μV

  • Magnitude Response, 20 Hz TO 20 kHz

    +0.00, -0.04 dB

  • Magnitude Response, -3 dB at

    0.015 Hz, 150 kHz

  • Voltage Gain

    26 dB

  • Signal to Noise Ratio (re: 300W/8Ω)

    -127 dB, unweighted, 20 to 22 kHz

  • Input Impedance

    Balanced: 100k ohms,
    Unbalanced: 50k ohms

  • Common Mode Rejection (Balanced Only)

    60 Hz: 90 dB, 10 kHz: 70 dB

  • Crosstalk, L to R or R to L

    Greater than 120 dB

  • Input Connectors

    3-pin balanced XLR

  • Output Connectors

    Two sets of 6 mm / .250-inch wingscrews

  • Weight

    Amplifier: 135 lbs. (61.2 kg)
    Shipping: 215 lbs. (97.5 kg)

  • Power Requirements

    100, 110-120, 220-240 VAC, 50-60 Hz

  • Power Consumption

    15W standby, 240W nominal, 3600W at maximum output