The MC901 Dual Mono Amplifier is truly a one-of-a-kind monoblock amplifier designed as the ultimate solution for bi-amping loudspeakers.

What makes the MC901 so unique is that it’s two amplifiers combined into one. Adding to the uniqueness is that each amplifier is of differing designs: the MC901 consists of a 300 W vacuum tube amplifier attached to a 600 W solid state amplifier on one unified chassis.

The 300 W vacuum tube portion powers the mid and upper drivers; the 600 W solid state section drives the power hungry woofers.

The full power is available to almost any speaker regardless if it has 2, 4 or 8 Ω impedance via our Unity Coupled Circuit output transformer in the vacuum tube section or our Autoformer™ in the solid state section.

Each amplifier section has its own discrete power supply so neither siphons power or performance away from the other.

Internal, adjustable crossover allows you to optimize the performance of both amplifier sections to your listening preferences.

Features our new DualView™ Power Output Meter that independently displays the real time power reading of each amplifier section.

Power Guard® helps prevent distortion and clipping in the solid state section. New Power Guard Screen Grid Sensor™ (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, Power Guard SGS™ dynamically attenuates the input signal in real time to keep the vacuum tubes operating at safe levels.

• Power Output - Solid State section: 600 W into 2, 4 or 8 Ω
• Power Output - Vacuum Tube section: 300 W into 2, 4 or 8 Ω
• Total Harmonic Distortion - Solid State section: 0.005% maximum from 20 Hz to 20 kHz
• Total Harmonic Distortion - Vacuum Tube section: 0.5% maximum from 20 Hz to 20 kHz
• Signal to Noise Ratio - Solid State section: 122 dB
• Signal to Noise Ratio - Vacuum Tube section: 112 dB
• Dynamic Headroom - Solid State section: 2.5 dB
• Dynamic Headroom - Vacuum Tube section: 1.2 dB
• Damping Factor - Solid State section: > 40
• Damping Factor - Vacuum Tube section: > 18
• Frequency Response - Solid State section: +0, -0.25 dB from 20 Hz to 20,000 Hz; +0, -3 dB from 10 Hz to 100,000 Hz
• Frequency Response - Vacuum Tube section: +0, -0.5 dB from 20 Hz to 20,000 Hz; +0, -3 dB from 10 Hz to 70,000 Hz
• Inputs: 3 Balanced, 3 Unbalanced (1 each for Solid State, Vacuum Tube and Composite)