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Two Channel Audio

Two Channel Audio > Amplifier


by McIntosh
Dual Monoblock Hybrid Amplifier

McIntosh has been perfecting vacuum tube amplifiers since the 1940's & solid state amplifiers since the 1960's. Our amplifiers have been used at many historic events including presidential inaugurations & Woodstock, as well as in landmark sound systems like the Grateful Dead's Wall of Sound, plus Despacio. From that heritage comes a truly one-of-a-kind home audio amplifier only we could dream up, design & build as the ultimate tool for bi-amplifying loudspeakers: the McIntosh MC901 Dual Mono Amplifier.

The MC901 is a monoblock amplifier that drives a single speaker. But it is unlike any other monoblock amplifier out there. 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 design philosophies: the MC901 consists of a 300 Watt vacuum tube amplifier built together with a 600 Watt solid state amplifier on one unified chassis.

The 300W vacuum tube portion powers the speaker's mid & upper drivers via 8 - KT88 output tubes, plus 4 - 12AT7 & 2 - 12AX7A signal tubes; the solid state section puts out 600 Watts of dedicated power to the power hungry woofers. The 300 Watt vacuum tube amp in the MC901 uses our patented Unity Coupled Circuit output transformer – the same technology McIntosh was founded on in 1949 – to deliver its full 300 Watts into almost any speaker regardless if it has 2, 4 or 8 Ohm impedance. Similarly, the 600 Watt solid state amp delivers its full 600 Watts into a 2, 4 or 8 Ohm impedance speaker via our Autoformer™ technology.