The McIntosh MC451 Dual Mono Amplifier brings together the signature sound of tubes and the precision of solid-state amplification in a single chassis. Featuring a 150W vacuum tube amplifier for mid and high frequencies and a 300W solid-state amplifier for low frequencies, it provides the flexibility and clarity needed for today’s most demanding audio systems. Designed to deliver dynamic power and pure musicality, the MC451 fits perfectly into serious two-channel setups or bi-amplified speaker systems.
Key Features
- Dedicated 150W tube amplifier and 300W solid-state amplifier built into one unit
- Hybrid Drive™ technology for tailored speaker performance
- Adjustable crossover and independent gain controls for fine-tuning sound
- Quad-balanced design for exceptional low noise and distortion
- Classic McIntosh styling with dual blue watt meters and polished finish
- Autoformer™ technology ensures consistent power into 2, 4, or 8 Ohm speakers
- Built-in Power Guard® and Sentry Monitor™ circuits for safe operation
Why Buy
The McIntosh MC451 is ideal for music lovers who want the character of vacuum tubes with the impact of solid-state power. Designed for bi-amping or fine-tuning performance, it offers unmatched control and musical expression in a refined package.
- Perfect balance of tube warmth and solid-state strength
- Seamless bi-amplification for superior system optimization
- McIntosh build quality and visual appeal that lasts a lifetime
Product Specifications
| General Information | |
|---|---|
| Brand | McIntosh |
| Model | MC451 |
| Type | Dual Mono Amplifier |
| Amplifier Class | Tube (Mid/High), Solid-State (Low) |
| Number of Channels | 2 (independent mono amplifiers in one chassis) |
| Power Output | 150W Tube (mid/high) + 300W Solid-State (low) |
| Country of Manufacture | United States |
| Audio | |
| Frequency Response | +0, -0.5dB from 20Hz to 20kHz; +0, -3dB from 10Hz to 100kHz |
| Total Harmonic Distortion (THD) | 0.08% max from 250mW to rated power |
| Signal to Noise Ratio | Solid-State: 120dB; Tube: 112dB |
| Damping Factor | Greater than 40 (solid-state section) |
| Speaker Impedance | 2, 4, or 8 Ohms |
| Dynamic Headroom | 1.2dB |
| Connectivity | |
| Input Types | Balanced XLR, Unbalanced RCA |
| Output Types | Gold-plated speaker binding posts |
| Power Control Input/Output | Yes (for automatic power on/off with connected components) |
| Data Ports | Yes (for McIntosh data communication) |
| Battery & Charging | |
| Battery Powered | No (AC powered) |
| Power Requirements | 120V/230V 50/60Hz, factory configured |
| Power Consumption (Idle) | 120W |
| Power Consumption (Max) | 850W |
| Features | |
| Meter Type | Dual Blue Watt Meters |
| Circuitry Protection | Power Guard®, Sentry Monitor™ |
| Tube Compliment | 4 x KT88, 2 x 12AX7A, 2 x 12AT7 |
| Chassis Material | Polished Stainless Steel |
| Cooling System | Thermal controlled fans |
| Physical Specifications | |
| Dimensions (W x H x D) | 17-1/2" (44.45cm) x 9-7/16" (24cm) x 20-3/8" (51.75cm) |
| Weight | 93 lbs (42.2 kg) |
| Finish | Gloss black with polished stainless steel chassis |
| LED Illumination | Yes (for meters and logos) |
| In the Box | |
| Included Accessories | Power cable, Manual, Spare fuses, Warranty card |
| Warranty | |
| Warranty Period | 3 Years (with registration) |
| Customer Support Info | Contact McIntosh Labs or Authorized Dealer |