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.1 The MC3500 would go on to power many other influential music events.

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.

Specifications

ELECTRONIC SPECIFICATIONS

• 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

• 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

CONTROL

• Remote Power Control

  Yes

• Multi-Channel DB25 Cable

  N/A

GENERAL SPECIFICATIONS

• 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

CONNECTIVITY

• Speaker Binding Post Type

  Patented Solid Cinch™ Speaker Binding Posts

WEIGHTS & DIMENSIONS

• 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)

• Shipping Weight

  147 lbs (66.7 kg)

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