McIntosh MC451

• Includes our Hybrid Drive™ technology that uses the best of vacuum tubes and solid state to produce the best sound performance
• Designed with bi-amping loudspeakers in mind
• 150 Watt vacuum tube amplifier and 300 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

Electronic Specifications

• FTC Power Output Rating

  Solid State section: 300 W
  Vacuum Tube section: 150 W

• Power Output per Channel

  Solid State section: 300 W 2, 4 or 8 ohms
  Vacuum Tube section: 150 W into 2, 4 or 8 ohms

• Number of Channels

  1

• Total Harmonic Distortion

  Solid State section: 0.005% maximum harmonic distortion at any power level from 250 milliwatts to rated power, 20Hz to 20kHz
  
  Vacuum Tube section: 0.5% maximum harmonic distortion at any power level from 250 milliwatts to rated power, 20Hz to 20kHz

• S/N below rated output

  Solid State section: 118dB
  Vacuum Tube section: 112dB

• Dynamic Headroom

  Solid State section: 2.5dB
  Vacuum Tube section: 1.2dB

• Damping Factor

  Solid State section: >40
  Vacuum Tube section: >18

• Rated Power Band

  Solid State section: 20Hz to 20kHz
  Vacuum Tube section: 20Hz to 20kHz

• Frequency Response

  Solid State section:
  +0, -0.25dB from 20Hz to 20kHz
  +0, -3dB from 10Hz to 100kHz
  
  Vacuum Tube section:
  +0, -0.5dB from 20Hz to 20kHz
  +0, -3dB from 10Hz to 70kHz

Control

• Remote Power Control

  Yes

• Multi-Channel DB25 Cable

  N/A

Connectivity

• Speaker Binding Post Type

  Patented Solid Cinch™ Speaker Binding Posts

General Specifications

• Circuit Configuration

  Solid State section: Push-Pull Complementary
  Vacuum Tube section: Unity Coupled

• Circuit Design

  Solid State and Vacuum Tube

• Mono Bridge

  No

• Mono Parallel

  No

• Output Type

  Solid State section: Autoformer™
  Vacuum Tube section: Unity Coupled Output Transformer

• Meters

  DualView™ Power Output Meter

• Meter Light Switch

  Yes

• Balanced Input

  2 (1 Solid State or Mono, 1 Vacuum Tube)

• Front Panel

  Glass

• Illumination

  Direct LED

• Chassis Style

  Polished stainless steel & black painted steel

Weights & Dimensions

• Unit Dimensions (W x H x D)

  17-7/8" (45.4cm) x 11-13/16" (30cm) x 21-1/2" (54.6cm)

• Unit Weight

  133 lbs (60.3 kg)

• Shipping Weight

  159 lbs (72.1 kg)