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McIntosh MC3500 1-Channel Vacuum Tube Amplifier Mk II

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Timonium - 410.308.1650
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FEATURES:

  • 350 Watt Monoblock
  • Inspired by the original 1968-71 MC3500 – the Amplifier that Inspired a Generation
  • Powered by eight EL509S high-power output vacuum tubes
  • Power Guard Screen Grid Sensor™, Sentry Monitor, Solid Cinch speaker binding posts
  • Machined aluminum front panel with a bead blast finish and gold anodizing

Inspired by the amplifier that inspired a generation.

There's no denying the historic significance of the 1969 Woodstock Music and Art Fair. There had never been anything like it, and many would argue there's not been anything like it since. With an unexpected crowd of over 400,000 people, there was a lot that could have gone wrong – and some things did. But one aspect that's nearly universally agreed upon was how great all the musicians sounded. That sound quality is thanks in part to the McIntosh MC3500 Vacuum Tube Amplifiers that exclusively powered the sound system used at Woodstock. The MC3500 would go on to power many other influential music events.

It was at a 2019 event to celebrate the 50th Anniversary of Woodstock where McIntosh President Charlie Randall, realizing the historical importance of the MC3500, first dreamed of bringing it back into production. That proved no easy task considering it was first designed over 50 years ago. But after more than two years of development, that dream has become reality as McIntosh is proud to announce the MC3500 Vacuum Tube Amplifier Mk II.

The MC3500 Vacuum Tube Amplifier Mk II is a conservatively rated 350 Watt monoblock that takes its inspiration from the original 1968-71 MC3500 and incorporates everything we have learned about vacuum tube amplifier design since the 1960s. It has been upgraded to modern standards and with modern components to deliver an audio performance worthy of its predecessor and the legacy of their shared model number – all while adhering to the original design as much as possible. Like the original MC3500, the MC3500 Mk II uses our Unity Coupled Circuit output transformer, which allows the full 350 Watts to be safely delivered to virtually any speaker regardless if it has 2, 4 or 8-Ohm impedance.

The MC3500 Mk II is powered by eight EL509S high-power output vacuum tubes. The EL509S tube was chosen specifically due to it having many similar qualities and characteristics of the 6LQ6 "sweep tubes" used on the original MC3500. Like the 6LQ6, the EL509S is very rugged thanks to its robust cathode and associated heating element which produces a high peak plate current capability in excess of 1 Amp.

SPECS:

  • Power Output per Channel
    350W @ 2, 4 or 8 Ohms
  • Number of Channels
    1
  • Total Harmonic Distortion
    0.3% maximum harmonic distortion at any power level from 250 milliwatts to rated power, 20Hz to 20,000Hz
    <0.20% at 1W, 20Hz to 20,000Hz
  • S/N below rated output
    120dB
  • Dynamic Headroom
    2.4dB
  • Damping Factor
    >25 Wideband
  • Rated Power Band
    20Hz to 20kHz
  • Frequency Response
    +0, -0.5dB from 20Hz to 20,000Hz
    +0, -3.0dB from 10Hz to 70,000Hz
  • Remote Power Control
    Yes
  • Multi-Channel DB25 Cable
    N/A
  • Circuit Configuration
    Unity Coupled
  • Circuit Design
    Vacuum Tube
  • Mono Bridge
    No
  • Mono Parallel
    No
  • Output Type
    Unity Coupled Output Transformer
  • Meters
    Yes
  • Meter Light Switch
    Yes
  • Balanced Input
    Yes
  • Front Panel
    Machined aluminum with handles
  • Illumination
    Direct LED
  • Chassis Style
    Polished stainless steel

Speaker Binding Post TypePatented Solid Cinch™ Speaker Binding Posts

  • Unit Dimensions (W x H x D)
    18" (45.7cm) x 11-13/16" (30cm) x 21-5/8" (54.9cm)
  • Unit Weight
    121 lbs (54.9 kg)

 


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