McIntosh Labs MI502 2-Channel Digital Amplifier
Lightning-fast and confidently muscular, the MI502 brings whip-smart dynamics, neutral transparency and richly controlled bass to demanding loudspeakers. HiFi News found its sound engaging rather than clinical, with atmospheric front-to-back scale and effortless attack. Add 500W per channel, quiet 2U rack flexibility and signature illuminated meters, and this is a serious install-friendly powerhouse.
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Nicely Roasted
Sound Quality
90/100
Build Quality
89/100
Value for Money
85/100
Pros
Exceptionally fast, precise transient delivery keeps complex and up-tempo music free of smear or blur.
Powerful yet controlled presentation combines substantial bass weight, dynamic authority and a neutral, transparent balance.
Versatile, quiet 2U installation design includes removable rack ears, balanced and unbalanced inputs, protection circuits and no noisy cooling fans.
Cons
Despite its considerable power, it does not produce the very largest bass swells.
Its 533mm chassis depth can make discreet rack or furniture placement more difficult.
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What Reviewers Are Saying
SOUND QUALITY PERFORMANCE 90/100
Reviewers found a fast, powerful and engaging presentation that avoids the sterile character sometimes associated with switching amplification. Its strongest traits are transient precision, substantial musical weight and an atmospheric stage, although the available commentary is more specific about speed and control than expansive imaging.
Transparency Resolution
91/100
HiFi News describes a largely neutral presentation with enough transparency to expose limitations in the source material. It also praised the MI502 for capturing musical events without smear or blur, alongside clearly defined individual bass notes.
Tonal Balance Musicality
90/100
The sound is described as neutral through the bass and lower midrange, but also fulsome, fast and fun rather than clinical. Reviewers heard convincing vocal delicacy, piano weight and body, smooth background strings, and enough grit for distorted rock instruments.
Dynamics
94/100
This is the standout area in the listening report: the MI502 is praised for whip-smart reflexes, precise attack and an effortless handling of up-tempo music. It meets dynamic bursts head-on and combines its 500W/8-ohm and 800W/4-ohm output with notably clean transient control, though HiFi News felt it did not turn all of its power into the very largest bass swells.
Soundstage Imaging
87/100
HiFi News calls the presentation atmospheric and reports a soundstage with convincing front-to-back scale. The reviews offer little further detail on image specificity, lateral width or the layering of complex ensembles.
Assessments of Build Quality, Usability, and Overall Propositions.
Build Quality
89/100
The MI502 combines a compact 2U, rack-mountable Class D chassis with removable brackets, balanced and unbalanced inputs, standard speaker terminals, and McIntosh’s illuminated front meters. Practical protection includes Power Guard overload management, Sentry Monitor short-circuit protection, 12V triggering and signal sensing; the efficient design also avoids the need for noisy cooling fans.
Value for Money
85/100
At roughly $5,000 to $7,820, the MI502 occupies a premium installation-oriented amplifier segment. The reviews praise its performance and facilities but do not directly compare its asking price with competing amplifiers or offer a clear judgment on value against peers.
Reviews & Sources
Professional reviews and sources for this product's Watt'n Potatoes analysis.
Online Reviews & Mentions
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Specifications
- FTC Power Output Rating
- 500 W
- Power Output per Channel
- 500 W into 8 ohms800 W into 4 ohms
- Number of Channels
- 2
- Total Harmonic Distortion
- 0.05%
- S/N below rated output
- 98dB
- Dynamic Headroom
- 8 ohms: 2.7dB4 ohms: 3.7dB
- Damping Factor
- 8 ohms: >854 ohms: >45
- Rated Power Band
- 20Hz to 20kHz
- Frequency Response
- +0, -0.9dB from 20Hz to 20kHz
- Remote Power Control
- Yes
- Multi-Channel DB25 Cable
- N/A
- Speaker Binding Post Type
- Standard
- Circuit Configuration
- Closed loop digital switching
- Circuit Design
- Digital
- Mono Bridge
- N/A
- Mono Parallel
- N/A
- Output Type
- Direct Coupled
- Meters
- Yes
- Meter Light Switch
- No
- Balanced Input
- 1
- Front Panel
- Glass with removable rack mounting ears
- Illumination
- Direct LED
- Chassis Style
- Black painted steel
- Unit Dimensions (W x H x D)
- 17-1/2" (44.45cm) (19" (48.3cm with mounting ears)) x 4-5/16" (11cm) (including feet) x 21" (53.3cm) (including front panel and cables)
- Unit Weight
- 21.5 lbs (9.8 kg)
- Shipping Weight
- 37.9 lbs (17.2 kg)
Manufacturer's Description — McIntosh Labs
- Type: Digital
- 500 Watts x 2-Channels into 8 Ohms
- 800 Watts x 2-Channels into 4 Ohms
- Power Guard®, Sentry Monitor™, On/Off signal sensing
- 2U rack mountable
The MI502 2-Channel Digital Amplifier is a flexible component and welcome addition to a custom installed home audio or home theater system. It delivers world renowned McIntosh sound quality at a rate of 500 Watts into 8 Ohm speakers or 800 Watts into 4 Ohm speakers. It uses highly high-tech closed loop digital switching amplifiers and resilient power supplies that produce performance levels seldom heard in custom install audio.
The applications are nearly limitless for how to use the versatile MI502 in your home entertainment system. It can be used to power the front left and right speakers in a home theater; to drive two in-wall subwoofers; a pair of MI502s could drive the three front channels of your in-home cinema plus one subwoofer; or to power a pair of outdoor speakers for when the party makes it way outside. Additionally, a stack of multiple MI502s could be used to power the distributed audio speakers installed throughout your home.
The MI502 is rack mountable and has a mounting height of 2U making it easy to install in an equipment rack via the included mounting brackets (the mounting brackets are removable for non-rack installations). As a highly efficient Class D amplifier, it does not require noisy cooling fans to maintain nominal operating temperature so the only thing you'll hear coming from it is amazing sounding audio that will impress yourself and your guests.
On the front panel are two blue McIntosh Watt Meters that display the power output of each channel, while multi-color LED indicators display the status of each channel. The back panel includes a pair of balanced and unbalanced inputs to connect the MI502 to your preamplifier. A pair of our standard 5-way speaker binding posts are included to connect your speakers
Other features that come with the MI502 are:
- Power Guard signal overload technology that prevents overdriving the speakers
- Sentry Monitor short-circuit protection circuit that disengages the output stage before current exceeds safe operating levels and then resets automatically when operating conditions return to normal
- Power Control 12 Volt triggering capabilities
- Eco-friendly on/off signal sensing that turns the unit off if no input signal has been detected for a set amount of time or automatically turns the amp on when it senses a signal
The MI502 includes many McIntosh design cues including a black glass front panel, our coveted blue Watt meters, an illuminated McIntosh logo, and a familiar form factor highlighted by silver trim. Contact your local dealer or integrator to learn more about adding the MI502 to your custom audio installation.
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Authorized dealers for McIntosh Labs MI502 2-Channel Digital Amplifier
- Absoulute Audio plus Video — in-store — Aiken, South Carolina, United States (website)
- Holt Hill — online and in-store — Andover, Massachusetts, United States (website)
- Resolution A/V — in-store — New York City, New York, United States (website)
- A Tube High Fidelity — online and in-store — Almere, Flevoland, Netherlands (website)
- Abt Electronics — online and in-store — Glenview, Illinois, United States (website)
- Acoustic Designs Inc. — in-store — Scottsdale, Arizona, United States (website)
- Advance Audio — in-store — Wichita, Kansas, United States (website)
- Ahead Stereo — in-store — Los Angeles, California, United States (website)
- Ajasom — online and in-store — Amadora, Lisboa, Portugal (website)
- Alen Audio — in-store — Extramurs, Comunidad Valenciana, Spain (website)
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