The McIntosh MC451 Dual Mono Amplifier is a specialized, single-channel powerhouse designed for precision bi-amplification. It uniquely combines a 300-Watt solid-state amplifier for bass frequencies and a 150-Watt vacuum tube amplifier for midranges and trebles within one chassis, ensuring distinct sonic benefits for each frequency range.

Featuring Hybrid Drive™ Technology, it leverages Autoformer™ for solid-state and Unity Coupled Output Transformer for tube sections, delivering full power into 2, 4, or 8 Ohm loads. Technologies like Power Guard® and Power Guard SGS® protect both sections. Its iconic black glass front panel with visible tubes and a DualView™ Power Output Meter showcases its engineering. With an adjustable crossover and dedicated inputs/outputs, the MC451 offers unparalleled control and sonic purity for discerning audiophiles.

The MC451 Dual Mono Amplifier is an unconventional amplifier that delivers a stunning sound experience.

- Designed with bi-amping loudspeakers in mind, the MC451 is comprised of a 150 Watt vacuum tube amplifier and 300 Watt solid state amplifier.
- The vacuum tube section powers midranges and tweeters while the solid state section drives power hungry woofers.
- Uses our Hybrid Drive™ technology that combines a separate vacuum tube and solid state amplifier onto one single chassis to produce the best possible sound performance.
- The full power is available to almost any speaker regardless if it has 2, 4 or 8 Ohm impedance via our Unity Coupled Circuit output transformer in the vacuum tube section or our Autoformer™ in the solid state section.
- The large but quiet toroidal transformer generates enough power so that neither amplifier robs power or performance from the other.
- An internal crossover lets you easily adjust the performance of both amplifiers to your listening preferences and speaker specifications.
- Includes our DualView™ Power Output Meter that independently displays the real time power reading of each amplifier.
- Full of time tested McIntosh technologies including Power Guard®, Power Guard Screen Grid Sensor® (SGS), Sentry Monitor™, Power Control, Solid Cinch™ speaker binding posts, a McIntosh Monogrammed Heatsink™, and Power Management System.

ELECTRONIC SPECIFICATIONS
Power Output per Channel
Solid State section: 300 Watts @ 2, 4 or 8 Ohms
Vacuum Tube section: 150 Watts @ 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 20,000Hz
Vacuum Tube section: 0.5% maximum harmonic distortion at any power level from 250 milliwatts to rated power, 20Hz to 20,000Hz
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 20,000Hz
- +0, -3dB from 10Hz to 100,000Hz

Vacuum Tube section:
- +0, -0.5dB from 20Hz to 20,000Hz
- +0, -3dB from 10Hz to 70,000Hz

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)

Orders ship Sunday through Friday from our offices in Dubai, UAE.

In-stock products typically ship within 48 hours and should be expected to arrive in 3-4 business days. Orders outside of the UAE should be expected to arrive in 5-7 business days.

Pre-order and backorder products will state the approximate delivery timeline beside the Add To Cart button.

If you would like to place a custom order, chat with our specialists for a guided shopping experience. Once your order has been placed, a timeline will be provided depending on your order details.

- Free delivery within the UAE
- Shipping charges will be calculated upon checkout for orders outside of the UAE (Bahrain, Oman, Kuwait, Saudi Arabia & Qatar).
- Taxes and duties are calculated according to the applicable laws of the state or country an item is shipped to and are the customer's responsibility.

For additional information on shipping and our exchange & return policy visit our help center.

Installation charges are applicable and can be paid upon delivery for our clients based in Dubai.

- Installation Charges: AED 450 Per Hour
- Speaker Cables: AED 32 Per Meter
- Trunking: AED 10 Per Meter

For clients based outside of the UAE, please contact our specialists and we will share an estimate based on your requirements.