870A Power Amplifier
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No global feedback for fast and lifelike musicality

“There was also outstanding image focus from left to right and from front to back, making performers’ positions onstage easy to discern […] The 870A Power Amplifier’s re-creation of the spaces around musicians was a product of its topnotch reproduction of resolution and detail.”
– Doug Schneider, SoundStage!

Seducing warm sound

300W per channel

Power AmplifiersSpecifications

Product features
In the box
User manual
Comparison chart
Design features
  • Our “Lynx” Technology which eliminates feedback and results in: real-time amplification; more accurate musical reproduction with respect to tonality; non-existent transient intermodulation distortion; the elimination of phase errors resulting from feedback.

  • Output stable to any known speaker impedance.

  • A high damping factor for superior musical dynamics, improved signal speed and refined timbre accuracy.

  • Self-diagnostic system that detects both over-heating and the presence of DC in the input signal.

Specifications
  • Output Power at 8Ω
    300 W per channel
  • Output Power at 4Ω
    600 W per channel
  • Output Power - Bridged Mono at 8Ω
    1200 W
  • Input Sensitivity
    1400mV RMS
  • Input Impedance
    47,500Ω
  • Gain
    31dB
  • Signal-to-noise Ratio
    106dB @ full power
  • Frequency response (full range)
    10Hz - 200kHz +0/-3.0dB
  • Crosstalk @ 1kHz
    -105dB
  • THD (20Hz - 20kHz @ 1 W)
    0.015%
  • THD (20Hz - 20kHz @ 300 W)
    0.04%
  • Intermodulation distortion
    0.006%
  • Shipping weight
    98 lb / 44 kg
  • Dimensions (width x height x depth)
    18.75 x 7.5 x 17.5 in
  • 47.6 x 19.2 x 44.5 cm