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McIntosh MC901

McIntosh MC901

$0.00Price

 

  • AÇIKLAMA

    • The ultimate solution for bi-amping loudspeakers: 300 Watt vacuum tube amplifier and 600 Watt solid state amplifier on one chassis
    • Vacuum tube section powers mid and upper drivers
    • Solid state section drives power-hungry woofers
    • DualView™ Power Output Meter

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

    McIntosh MC901 Amplifier
    The MC901 is a monoblock amplifier that drives a single speaker. But it is unlike any other monoblock amplifier. 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 attached to a 600 Watt solid state amplifier on one unified chassis.

    McIntosh MC901 Amplifier
    The 300 Watt vacuum tube portion powers the speaker's mid and upper drivers via eight KT88 output tubes, plus four 12AT7 and two 12AX7A signal tubes; the solid state section delivers 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.

    Vacuum tubes do not perform at their best when they are amplifying lower frequencies that are not being used by the loudspeaker. With the MC901, the vacuum tube amp will not be burdened with low end reproduction as the solid state section will drive these frequencies. The two amplifier sections of the MC901 are designed to work together in a synergistic relationship and are specifically engineered to assure that each section only amplifies its intended frequencies. Each amplifier section has its own discrete power supply so neither siphons power or performance away from the other. All of this results in easy bi-amping with unparalleled performance and sound reproduction from your speakers.

    Prior to the MC901, bi-amping a speaker required two separate amplifiers. It also required an external crossover, along with a lot of trial and error, to properly configure the two detached amplifiers so they worked together as best as possible. The MC901 solves this issue thanks to its internal, adjustable crossover with the controls easily accessible on the top of the unit. These adjustable crossover filters allow you to optimize the performance of both amplifier sections to your listening preferences. Relative gain levels for each amplifier section can be adjusted from -6dB to + 3dB. A direct feed can also be connected to each amplifier section, thus bypassing the filters.

    Like virtually all McIntosh amplifiers, the MC901 features an iconic "McIntosh Blue" Watt meter, which has come to be recognized around the world as a symbol of quality home audio. And just like the MC901 itself is a new design, so too is its meter with the introduction of our new DualView™ Power Output Meter. The DualView meter features two of our traditional, fast responding mechanical meters stacked above and below each other in a single meter window; one meter is dedicated to the 300 Watt vacuum tube amp and the other to the 600 Watt solid state amp. Each meter operates independently of the other and displays the real time power reading of each amplifier section.

    While an entirely new design, the MC901 comes with the technology one would expect from a McIntosh amplifier:
     

    • Power Guard® that monitors and adjusts the input signal in the 600 Watt solid state amplifier section in real time, then makes unobtrusive adjustments to prevent harsh sounding distortion and potential speaker damaging clipping.
    • Power Guard Screen Grid Sensor™ (SGS). The 300 Watt vacuum tube amplifier section of the MC901 breaks new ground as it's our first amplifier to feature our new 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.
    • Sentry Monitor™ observes the output current and shuts the amplifier off if it ever exceeds safe limits.
    • Quad Balanced design that cancels virtually all noise and distortion that may have crept into the audio signal.
    • Power Control that can send power on/off signals to other connected McIntosh components for easy system power up and shutdown.
    • Our patented, gold-plated Solid Cinch™ speaker binding posts that easily and securely attach the speaker cables.
    • McIntosh Monogrammed Heatsinks™ that are connected to advanced high current output transistors efficiently cool the solid state amplifier section.
    • Our Power Management System that will turn the entire unit off after a set amount of time when no input signal has been detected.

    Although the MC901 may look different than any McIntosh product before it, a quick glance reveals signature McIntosh design cues. The top is highlighted by a series of diagrams printed on glass that outline the basic circuitry and specifications of the unit, along with a glass nameplate trimmed with a circular aluminum ring that's finished to match the front panel endcaps. The sides are adorned with vintage McIntosh-styled die cast aluminum name badges. Two classic McIntosh knobs are located on the front of the polished stainless steel chassis, and direct LED backlighting illuminates the DualView meter, McIntosh logo and the lettering on the black glass front panel.

  • TEKNİK ÖZELLİKLER

    Solid State Specifications

    Power Output Solid State

    600 watts into 2 Ohm load

    600 watts into 4 Ohm load

    600 watts into 8 Ohm load

    Rated Power Band

    20Hz to 20,000Hz

    Dynamic Headroom

    2.5dB

    Wide Band Damping Factor

    Greater than 40

    Frequency Response (Direct)

    +0, -0.25dB from 20Hz to 20,000Hz

    +0, -3.0dB from 10Hz to 100,000Hz

    Total Harmonic Distortion

    0.005% maximum harmonic distortion at any power level

    from 250 milliwatts to rated power, 20Hz to 20,000Hz

    Intermodulation Distortion

    0.005% maximum, if the instantaneous peak power output

    does not exceed twice the rated power output for any

    combination of frequencies from 20Hz to 20,000Hz

    Signal To Noise Ratio (A-Weighted)

    122dB below rated output

    Input Sensitivity (for rated output)

    4.8 Volts Balanced

    2.4 Volts Unbalanced

    Vo l t age Gain

    29dB, 8 Ohms

    26dB, 4 Ohms

    23dB, 2 Ohms

    Input Impedance

    22,000 ohms Balanced

    22,000 ohms Unbalanced

    Vacuum Tube Specifications

    Power Output Vacuum Tube

    300 watts into 2 ohm load

    300 watts into 4 ohm load

    300 watts into 8 ohm load

    Rated Power Band

    20Hz to 20,000Hz

    Dynamic Headroom

    1.2dB

    Wide Band Damping Factor

    Greater than 18

    Frequency Response (Direct)

    +0, -0.5dB from 20Hz to 20,000Hz

    +0, -3.0dB from 10Hz to 70,000Hz

    Total Harmonic Distortion

    0.5% maximum harmonic distortion at any power level

    from 250 milliwatts to rated power, 20Hz to 20,000Hz

    Intermodulation Distortion

    0.5% maximum, if the instantaneous peak power output

    does not exceed twice the rated power output for any

    combination of frequencies from 20Hz to 20,000Hz

    Signal To Noise Ratio (A-Weighted)

    112dB below rated output

    Input Sensitivity (for rated output)

    3.4 Volts Balanced

    1.7 Volts Unbalanced

    Vo l t age Gain

    29dB, 8 Ohms

    26dB, 4 Ohms

    23dB, 2 Ohms

    Input Impedance

    22,000 ohms Balanced

    22,000 ohms Unbalanced

    General Specifications

    Power Control Input

    5-15VDC, less than 1mA

    Power Control Output

    12VDC, 25mA (Delayed 0.2 seconds from power on)

    Power Requirements

    100 Volts ~ 50/60Hz at 15 Amps

    110 Volts ~ 50/60Hz at 12.5 Amps

    120 Volts ~ 50/60Hz at 12 Amps

    127 Volts ~ 50/60Hz at 12 Amps

    220 Volts ~ 50/60Hz at 12 Amps

    230 Volts ~ 50/60Hz at 6.5 Amps

    240 Volts ~ 50/60Hz at 6.5 Amps

    Standby, less than 0.5 watt

    Refer to the rear panel of the MC901 for the correct voltage.

     

    Overall Dimensions

    Width is 17-1/2 inches (44.5cm)

    Height is 13-1/4 inches (33.7cm) including feet

    Depth is 29-1/2 inches (74.9cm)

    Weight

    180 pounds (81.6kg) net

    200 pounds (90.7kg) in shipping carton

    Shipping Carton Dimensions

    Width is 24-13/16 inches (63cm)

    Depth is 36-1/4 inches (92.1cm)

    Height is 18-3/8 inches (46.7cm)

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