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19.09.2025 / 20.09.2025
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ONLY AVAILABLE AT OUR LOCAL STORE

McIntosh MC901 AC Hybrid Bi-Amping Mono-Amplifier

€29,990.00

per Piece incl. VAT / incl. Shipping

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2% Cash Discount
We grant a cash discount when paying by advance transfer.
Available in 21 days, delivery time 2-5 days
 
Hamm
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Hamburg
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Münster
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Premium Installation

  1. After placing your order, your Account Manager will contact you to schedule delivery and installation.
  2. We deliver your new devices in Germany and Austria personally to the place of installation - no courier, no forwarding agency.
  3. The Auditorium Team installs your new devices professionally and connects them to existing components.
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Product number: 292878
Product­information
Product information MC901 AC Hybrid Bi-Amping Mono-Amplifier
Productnumber

292878

Tube transistor hybrid power amplifier
McIntosh Bi-Amping Monoblock MC901 AC

The McIntosh MC901 AC is a truly unique monobloc power amplifier and in many ways the ultimate solution for bi-amping loudspeakers.

What makes the MC901 AC so unique is the combination of two amplifiers in one. Each amplifier has a different design: The MC901 AC consists of a 300 watt tube power amp combined with a 600 watt transistor power amp. The 300-watt tube section supplies the middle and upper drivers, while the 600-watt transistor output stage supplies the power-hungry woofers.

A small sensation is the integrated, adjustable crossover, which optimizes the performance of both amplifier sections as desired. A perfect separation can take place here, so that the transfer point for both frequency paths can be precisely defined and adapted to the loudspeakers.

The full power is always available to the loudspeakers - regardless of whether they have an impedance of 2, 4 or 8 ohms. On the one hand via the Unity-Coupled-Circuit output transformer in the tube power amp, on the other hand via the Autoformer™ in the transistor section.

Each of the two amplifiers has a completely independent power supply, so that neither currents nor power have to be divided.

The MC901 AC features the gorgeous new DualView™ VU meter, which displays the real-time power output of each amplifier section.

For the benefit of power amplifiers and loudspeakers, Power Guard® prevents distortion and clipping. The new Power Guard Screen Grid Sensor™ (SGS) helps prevent premature tube failure by monitoring the current of the screen grid in the KT88 output tubes. If exceeded, Power Guard SGS™ reduces the input signal in real time to keep the tubes in a safe range.

Matches perfectly with the 70th Anniversary C70 AC tube preamp.

Technical specifications

Power output:
Solid state section:
600 watts into 2, 4 or 8 ohms
Vacuum tube section:
300 watts into 2, 4 or 8 ohms

Total Harmonic Distortion:
Solid state section:
0.005% maximum from 20Hz to 20kHz
Vacuum tube section:
0.5% maximum from 20Hz to 20kHz

Signal to Noise Ratio:
Solid state section: 122dB
Vacuum tube section: 112dB

Dynamic Headroom:
Solid state section: 1.8dB
Vacuum tube section: 1.2dB

Damping factor:
Solid state section: >40
Vacuum tube section: >18

Frequency Response:
Solid state section:
+0, -0.25dB from 20Hz to 20,000Hz
+0, -3dB from 10Hz to 100,000Hz
Vacuum tube section:
+0, -0.5dB from 20Hz to 20,000Hz
+0, -3dB from 10Hz to 70,000Hz

inputs:
3 balanced
3 Unbalanced
(1 each for Solid State, Vacuum Tube, and Composite)

Overall Dimensions (W x H x D): 44.5cm x 33.7cm x 74.9cm
Weight: 77.1 kg net, 86.2 kg in shipping carton



Color: black
Condition: new goods
Device depth mm: 749
Device height mm: 337
Device width mm: 445
Product type: Power amplifier
Product number 292878

Tube transistor hybrid power amplifier
McIntosh Bi-Amping Monoblock MC901 AC

The McIntosh MC901 AC is a truly unique monobloc power amplifier and in many ways the ultimate solution for bi-amping loudspeakers.

What makes the MC901 AC so unique is the combination of two amplifiers in one. Each amplifier has a different design: The MC901 AC consists of a 300 watt tube power amp combined with a 600 watt transistor power amp. The 300-watt tube section supplies the middle and upper drivers, while the 600-watt transistor output stage supplies the power-hungry woofers.

A small sensation is the integrated, adjustable crossover, which optimizes the performance of both amplifier sections as desired. A perfect separation can take place here, so that the transfer point for both frequency paths can be precisely defined and adapted to the loudspeakers.

The full power is always available to the loudspeakers - regardless of whether they have an impedance of 2, 4 or 8 ohms. On the one hand via the Unity-Coupled-Circuit output transformer in the tube power amp, on the other hand via the Autoformer™ in the transistor section.

Each of the two amplifiers has a completely independent power supply, so that neither currents nor power have to be divided.

The MC901 AC features the gorgeous new DualView™ VU meter, which displays the real-time power output of each amplifier section.

For the benefit of power amplifiers and loudspeakers, Power Guard® prevents distortion and clipping. The new Power Guard Screen Grid Sensor™ (SGS) helps prevent premature tube failure by monitoring the current of the screen grid in the KT88 output tubes. If exceeded, Power Guard SGS™ reduces the input signal in real time to keep the tubes in a safe range.

Matches perfectly with the 70th Anniversary C70 AC tube preamp.

Technical specifications

Power output:
Solid state section:
600 watts into 2, 4 or 8 ohms
Vacuum tube section:
300 watts into 2, 4 or 8 ohms

Total Harmonic Distortion:
Solid state section:
0.005% maximum from 20Hz to 20kHz
Vacuum tube section:
0.5% maximum from 20Hz to 20kHz

Signal to Noise Ratio:
Solid state section: 122dB
Vacuum tube section: 112dB

Dynamic Headroom:
Solid state section: 1.8dB
Vacuum tube section: 1.2dB

Damping factor:
Solid state section: >40
Vacuum tube section: >18

Frequency Response:
Solid state section:
+0, -0.25dB from 20Hz to 20,000Hz
+0, -3dB from 10Hz to 100,000Hz
Vacuum tube section:
+0, -0.5dB from 20Hz to 20,000Hz
+0, -3dB from 10Hz to 70,000Hz

inputs:
3 balanced
3 Unbalanced
(1 each for Solid State, Vacuum Tube, and Composite)

Overall Dimensions (W x H x D): 44.5cm x 33.7cm x 74.9cm
Weight: 77.1 kg net, 86.2 kg in shipping carton

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Color: black
Condition: new goods
Device depth mm: 749
Device height mm: 337
Device width mm: 445
Product type: Power amplifier

Safety Information

Product-specific safety instructions can be found in the operating manual.