McIntosh MC901  1-Channel Dual Mono Amplifier
McIntosh MC901  1-Channel Dual Mono Amplifier McIntosh MC901  1-Channel Dual Mono Amplifier McIntosh MC901  1-Channel Dual Mono Amplifier McIntosh MC901  1-Channel Dual Mono Amplifier

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Experience unparalleled sound performance with the McIntosh MC901. Its Hybrid Drive™ technology combines the best of vacuum tubes and solid state for a dynamic and powerful listening experience. With 300 Watts of vacuum tube power and 600 Watts of solid state power, the MC901 delivers its full potential to any speaker with 2, 4, or 8 Ohm impedance. Trust in our patented Unity Coupled Circuit output transformer, which has been a cornerstone of McIntosh since 1949. Elevate your sound with the MC901.

  • Sentry Monitor - McIntosh designed and patented circuit that activates in case of accidental “shorts" in speaker wires. Fuse-less short-circuit protection circuit disengages the output stage before current exceeds safe operating level-resets automatically.
  • Power Guard® that monitors and adjusts the input signal in the 300 Watt solid state amplifier section in real time, then makes inconspicuous volume adjustments to prevent harsh sounding distortion and potential speaker damaging clipping.
  • Power Guard Screen Grid Sensor® (SGS). The 300 Watt vacuum tube amplifier section features our Power Guard SGS® technology. Power Guard SGS helps prevent premature vacuum tube failure by monitoring the screen grid current in the KT88 output vacuum tubes. If the current becomes too high, a circuit in Power Guard SGS is activated which then dynamically attenuates the input signal in real time to keep the vacuum tubes operating at safe levels.
  • Monogrammed Heatsink
Output Per Channel
  • Solid State Section: 600W
  • Vacuum Tube Section: 300W
Number of Channels 1
Speaker Impedance 2 or 4 or 8 Ohms
Rated Power Band 20Hz - 20kHz
Total Harmonic Distortion
  • Solid State Section: 0.005% maximum harmonic distortion  at any power level from 250 milliwatts to rated power, 20Hz - 20kHz
  • Vacuum Tube Section: 0.5% maximum harmonic distortion at any power level from 250 milliwatts to rated power, 20Hz - 20kHz
Dynamic Headroom
  • Solid State Section: 2.5dB
  • Vacuum Tube Section: 1.2dB
Frequency Response
  • Solid State Section:
    • +0, -0.25dB from 20Hz to 20kHz
    • +0, -3.0dB from 10Hz to 100kHz
  • Vacuum Tube Section:
    • +0, -0.5dB from 20Hz to 20kHz
    • +0, -3.0dB from 10Hz to 70kHz
Damping Factor
  • Solid State Section: >40
  • Vacuum Tube Section: >18
Dimensions (WxHxD) 17 17/32" (44.5cm) x 13 3/8" (34cm) x 29 17/32" (75cm)
Weight 180lbs (81.6kg)