Two versions are available to suit any system: all-analog for more traditional systems and analog+digital for the streaming digital media listener. 

  • INPUTS: 3 pairs balanced analog via 3-pin XLR
  • DIGITAL INPUTS: Ethernet, USB x 4, AES3 (adaptable to S/PDIF), Toslink (optical), WiFi
  • OUTPUTS: 0.25" (6 mm) binding posts
  • CONTINUOUS POWER, 8 OHMS: 200W
  • PEAK POWER, 8 OHMS: 250W
  • CONTINUOUS POWER, 4 OHMS: 400W
  • PEAK POWER, 4 OHMS: 400W
  • PEAK POWER, 2 OHMS: 700W
  • DISTORTION, THD: 0.01%
  • EQUIVALENT INPUT NOISE (EIN), 20 KHZ: 2 μV
  • INPUT IMPEDANCE: 100k ohms, balanced
  • MAXIMUM ANALOG GAIN: 40.4 dB
  • FREQUENCY RESPONSE, 20-20 KHZ: 0.00, -0.04 dB
  • FREQUENCY RESPONSE, -3 DB: 0.015 Hz, 150 kHz
  • POWER REQUIREMENTS: 100V, 120V, 240V, 50-60 Hz
  • POWER CONSUMPTION: 1000W maximum
  • DIMENSIONS: 17" W x 15.4 D x 7.25" H
    (44 cm W x 39 cm D x 19 cm H)
  • WEIGHT54 lbs.
    (24.5 kg)
  • SHIPPING DIMENSIONS: 24" W x 23" D x 14" H
    (61 cm H x 59 cm D x 36 cm H)

Considering how much of an improvement the 866 offers over the 865, Boulder could be charging much more for the privilege. Not only does it sound better, but it's more powerful, stylish and affordable than its predecessor, and with the option to add a DAC, this is a real winner.