McIntosh MI502 2-Channel Digital Power Amplifier
The McIntosh MI502 is a compact, high-output 2-channel digital power amplifier built for premium stereo systems, home theaters and custom-installed distributed audio. Its closed-loop digital switching architecture delivers 500 watts per channel into 8 ohms or 800 watts per channel into 4 ohms, providing substantial power from a fanless, rack-friendly 2U chassis.
With balanced and unbalanced inputs, removable rack ears, twin blue McIntosh Watt meters and comprehensive protection circuitry, the MI502 combines the flexibility installers need with the visual character and performance expected from McIntosh.
High-Power Stereo Performance
The MI502 supplies two channels of direct-coupled amplification for demanding loudspeakers and custom audio applications. Its 500-watt rating into 8-ohm speakers rises to 800 watts per channel into 4 ohms, giving the amplifier the current capability and dynamic headroom needed for difficult speaker loads, high playback levels and larger listening spaces.
In a dedicated 2-channel system, the MI502 can be paired with a compatible stereo preamplifier or source component with volume control. Listeners seeking a larger traditional McIntosh stereo amplifier can also compare it with the McIntosh MC462 2-Channel Solid State Amplifier.
Flexible Home Theater Applications
The MI502 is equally useful in a home cinema. It can power the front left and right speakers while an A/V receiver or multichannel amplifier handles the remaining channels, or it can provide dedicated amplification for two passive subwoofers, surround speakers or height channels.
It is a particularly practical upgrade for the McIntosh MHT300 Home Theater Receiver, which allows selected channels to be routed to an external power amplifier. It can also serve as a high-powered 2-channel companion to the McIntosh MX200 A/V Processor in a separates-based theater.
Closed-Loop Class D Amplification
McIntosh uses sophisticated closed-loop digital switching amplifier circuits and robust power supplies to produce high output with excellent efficiency. This Class D design reduces the space and cooling demands associated with many conventional high-power amplifiers.
The MI502 does not require cooling fans during normal operation. Extensive chassis ventilation allows passive heat dissipation, helping keep dedicated listening rooms and equipment racks free from fan noise.
Designed for Custom Installation
At only 2U high, the MI502 fits neatly into a standard 19-inch equipment rack using its included removable mounting brackets. The rack ears can be removed when the amplifier will be placed on a conventional equipment shelf.
Multiple MI502 amplifiers can be used throughout a larger installation to power separate stereo zones, outdoor speakers, in-wall loudspeakers or other high-output distributed-audio applications. Its relatively manageable 21.5-pound chassis also simplifies placement and service compared with many traditional amplifiers of similar power.
Balanced and Unbalanced Connectivity
The rear panel includes a stereo pair of balanced XLR inputs and a stereo pair of unbalanced RCA inputs, allowing the MI502 to integrate with a wide range of preamplifiers, processors and control systems. Standard five-way binding posts provide secure speaker connections.
McIntosh Power Control supports coordinated startup and shutdown with compatible components. Automatic signal sensing can also turn the amplifier on when an input signal is detected and place it into standby after an extended period without a signal.
McIntosh Protection and Monitoring
- Power Guard®: Monitors the audio signal and helps prevent amplifier clipping from damaging connected loudspeakers.
- Sentry Monitor™: Protects the output stages from unsafe current conditions and automatically restores operation when conditions return to normal.
- Signal sensing: Provides automatic power-on and standby operation when desired.
- Power Control: Allows compatible McIntosh components to switch on and off together.
- Fanless cooling: Preserves quiet operation in listening rooms and equipment racks.
Twin McIntosh Watt Meters
Unlike many rack-oriented digital amplifiers, the MI502 retains the unmistakable visual identity of McIntosh. Two illuminated blue Watt meters display the output of the left and right channels, while multi-color LED indicators show channel operating status. The black glass front panel, illuminated green logo and silver trim allow the amplifier to look equally appropriate in a visible stereo system or a dedicated rack.
MI502 vs. MC462
The MI502 and MC462 are both high-powered McIntosh stereo amplifiers, but they serve different priorities. The MI502 uses efficient digital amplification, occupies only 2U of rack space and delivers 500 watts into 8 ohms or 800 watts into 4 ohms. It is especially well suited to custom installation, home theater expansion and systems where rack space and heat management matter.
The MC462 uses McIntosh’s traditional solid-state architecture with Autoformers and delivers 450 watts per channel into 2, 4 or 8 ohms. Its much larger chassis, extensive heatsinking and classic full-size presentation make it the more traditional choice for a statement 2-channel system.
McIntosh MI502 Specifications
| Amplifier Type | 2-channel digital power amplifier |
|---|---|
| Circuit Configuration | Closed-loop digital switching |
| Power Output | 500 watts per channel into 8 ohms; 800 watts per channel into 4 ohms |
| Number of Channels | 2 |
| Total Harmonic Distortion | 0.05% |
| Signal-to-Noise Ratio | 98dB below rated output |
| Dynamic Headroom | 2.7dB at 8 ohms; 3.7dB at 4 ohms |
| Damping Factor | Greater than 85 at 8 ohms; greater than 45 at 4 ohms |
| Rated Power Band | 20Hz to 20kHz |
| Frequency Response | +0/-0.9dB from 20Hz to 20kHz |
| Inputs | Stereo balanced XLR and unbalanced RCA |
| Speaker Connections | Standard five-way binding posts |
| Output Type | Direct coupled |
| Rack Height | 2U with removable rack-mounting ears |
| Dimensions | 17-1/2 inches W without ears; 19 inches W with ears x 4-5/16 inches H x 21 inches D |
| Weight | 21.5 lbs |
| Shipping Weight | 37.9 lbs |
| Warranty | 3-year limited warranty |
Frequently Asked Questions
Is the McIntosh MI502 a Class D amplifier?
Yes. McIntosh describes the MI502 as a digital amplifier using closed-loop digital switching circuitry, a sophisticated Class D topology designed for high output and efficiency.
Can the MI502 power a conventional stereo system?
Yes. It can serve as the primary power amplifier in a 2-channel system when connected to a compatible stereo preamplifier, DAC or source component with volume control.
Can the MI502 be used in a home theater?
Yes. Common applications include powering the front left and right speakers, two passive subwoofers, surround channels or height speakers. Larger theaters can use more than one MI502 alongside other multichannel amplifiers.
Can the MI502 drive 4-ohm speakers?
Yes. It is rated to deliver 800 watts per channel into 4-ohm loudspeakers.
Does the MI502 require a cooling fan?
No. Its efficient amplifier design and ventilated chassis allow fanless operation under normal conditions.
Can the MI502 be installed without a rack?
Yes. The included rack ears are removable, allowing the amplifier to be placed on a suitably ventilated equipment shelf.
Authorized McIntosh Dealer Support
Audio Exchange is an authorized McIntosh dealer in Richmond, Virginia. Our team can help with loudspeaker matching, preamplifier compatibility, theater channel planning, rack ventilation and distributed-audio design. Browse additional options in our McIntosh Power Amplifiers collection or explore complete systems in the McIntosh Home Theater collection.
