McIntosh
MC451 Dual Mono Amplifier

AED 59,345.00 (Inc. Tax)

(Price Per Unit)
Free delivery on orders above AED 500 in UAE.

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59345
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MC451 Dual Mono Amplifier

- 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

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Overview

A Stunning Sound Experience.

The MC451 Dual Mono Amplifier joins the MC901 in offering the ultimate solution to bi-amping a loudspeaker. Like the MC901, the MC451 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 from a bi-ampable speaker. Unlike the larger MC901, the MC451 has a more conventional McIntosh form factor and size, allowing it to fit into home audio systems, racks, and furniture more easily. Adding a pair of MC451s to your stereo system will allow your prized speakers to perform like never before.

The MC451 is comprised of a 150 Watt vacuum tube amplifier and a 300 Watt solid state amplifier, which is more than enough power to drive virtually all speakers.

The vacuum tube section drives the speaker’s midranges and tweeters, while the solid state section drives the woofers. The 150 Watt vacuum tube amplifier is powered by four KT88 output tubes which are located under a removable wire cage, plus two 12AT7 and one 12AX7A signal tubes; it uses our patented Unity Coupled Circuit output transformer to deliver its full 150 Watts into almost any speaker regardless if it has 2, 4 or 8 Ohm impedance.

Similarly, the 300 Watt solid state amplifier delivers its full 300 Watts into a 2, 4 or 8 Ohm impedance speaker via our Autoformer™ technology.

The two amplifiers in the MC451 are designed to work together in a synergistic relationship and are specifically engineered to assure that each only amplifies its intended frequencies. The large but quiet toroidal transformer generates enough power so that neither amplifier robs power or performance from the other. All of this results in easy bi-amping with unparalleled performance and sound reproduction from your speakers.

Bi-amping your speakers with the MC451 is easy. No longer do you need fiddle with two separate amplifiers, an external crossover, and a lot of trial and error to properly configure the two separate amplifiers with often times only so-so results. The MC451 solves these hassles thanks to its internal, adjustable crossover. The MC451’s crossover tailors the output frequency range of each amplifier section to the attached loudspeaker. Simply set the CROSSOVER POINT knob on the back of the MC451 to the loudspeaker’s crossover point, then frequencies below the crossover point will be sent to the solid state amplifier and frequencies above it will be sent to the vacuum tube amplifier.

This adjustable crossover allows you to optimize the performance of both amplifier sections to your speaker’s specifications and to your listening preferences. Gain levels for the vacuum tube amplifier can be adjusted from -6dB to +3dB. A direct feed can also be connected to each amplifier section, thus bypassing the internal crossover.

McIntosh MC451 Amplifier
The MC451 features our 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 150 Watt vacuum tube amp and the other to the 300 Watt solid state amp. Each meter operates independently of the other and displays the real time power reading of each amplifier section.

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 350 Per Hour
- Speaker Cables: AED 20 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.

A

The McIntosh audio system is a stereo system that uses two speakers or a multi-channel system using 3 to 12 speakers. Components are the individual units that individually will offer the highest performance and fidelity possible.

Connecting the various components into a complete system of source components, control center, amplifiers, and speakers will deliver the best possible sound.

January 6, 2023
Helpful?
A

Preamplifiers are Control Centers that switch source units, turn volume up and down, and in some cases allow tone shaping or turning bass and treble sounds up or down.

Amplifiers are the ‘Muscle’ of the audio system and amplify the small audio signal from the preamp to a large one that will operate speakers and determine how dynamic the reproduced sound of the system is in one unit.

Integrated amplifiers are single chassis models that combine the function of the preamplifier and power amplifier in one unit.

January 6, 2023
Helpful?
A

Precision McIntosh power meters allow the monitoring of sound level balance and output level between the two stereo, or many multi-channel speaker channels. Meters protect valuable speaker systems from damage as long as more watts than the speakers are designed to handle are not exceeded.

January 6, 2023
Helpful?
A

Power Assurance is a group of patented McIntosh circuit designs that protect the stereo from damage and allow maximum performance and long, trouble free life.

January 6, 2023
Helpful?
A

Quad Differential is the most sophisticated McIntosh amplifier design that allows the impossible combination of the most powerful amplifiers with the very lowest distortion and background noise. Many would say this is the impossible combination; highest power with lowest noise but Quad Balanced make the impossible possible.

January 6, 2023
Helpful?
A

Electromagnetic switching is used in McIntosh preamplifiers and integrated amplifiers to switch the variety of source components connected. Rather than the common mechanical switches that will deteriorate with wear, electromagnetic switches are high tech switching nodes that allow very long, trouble free operation.

January 6, 2023
Helpful?
A

Performance between vacuum tube and solid state (or transistor) gear is almost identical in technical specifications. Many users request vacuum tube units that offer a slightly classical "tube" or "warm" sound to the audio presentation.

Tube and solid state models may be mixed and will all work together in a McIntosh component stereo system. Many now use downloaded music as their main media source. Sound quality will always depend on the quality of the download files and the music system interface. McIntosh offers the most advanced computer USB interface in most of our preamplifiers and integrated amplifiers which will maximize audio performance.

January 6, 2023
Helpful?
A

The McIntosh Output Autoformer is a special transformer that is designed and manufactured in-house by McIntosh. This allows any speaker type to be used with a McIntosh amplifier and have all of the power that the amp is designed to deliver.

All other amplifier designs will not have even power with differing speaker designs. McIntosh amplifiers with the output Autoformer™ will deliver ‘All the Power You Pay For’ regardless of speaker type chosen.

January 6, 2023
Helpful?

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