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75W peak power per channel into 8 ohms, 110W peak power into 4 ohms, 200W peak power into 2 ohms
New protection circuitry enables the 861 to deliver greater current at maximum output without fear of damage to the amplifier's electronics
Space-saving design is the same footprint (width and depth) as the 812 DAC Preamplifier
In-house manufacturing efficiency improvements have made the 861 an incredible value in comparison to previous amplifiers
Smaller carton packaging means easier transportation, unpacking, and installation
Along with assembly and testing, every circuit board and piece of metalwork is produced in-house at Boulder's dedicated facility for unparalleled quality assurance
Boulder's traditional in-house 0.25" (6 mm) thumbscrew binding posts are included for secure speaker cable connections and optimal sound quality
IP control, and networked HTML page
Software updates to the internal control and housekeeping systems are available as needed with automated online downloads or manual USB port installation
Specifications
Continuous Power, 8 Ohms- 50W
Peak Power, 8 Ohms- 75W
Continuous Power, 4 Ohms- 90W
Peak Power, 4 Ohms- 110W
Peak Power, 2 Ohms- 200W
Balanced Analog Inputs- 1 pair balanced via 3-pin XLR
Outputs- .25" (6mm) Binding posts
Distortion, THD- 0.01%
Equivalent Input Noise (EIN), 20 KHz- 2.6 μV
Input Impedance- 100kΩ Balanced
Frequency Response, 20 Hz to 20 KHz- +0.00, -0.04 dB
Frequency Response, -3 dB- 0.015 Hz, 150 kHz
Maximum Analog Gain- 26 dB
Power Requirements- 100V, 120V, 240V, 50-60 Hz
Power Consumption- 550W Maximum
Dimensions- 12"x12"x3.5"
Weight- 22 lbs