McIntosh MI502 2-Channel Power Amplifier

500 Wpc into 8 ohms, 800 Wpc into 4 ohms, with balanced inputs, dual Watt Meters, and 2U rack mounting

The McIntosh MI502 is a flexible 2-channel amplifier for stereo systems, home theaters, and custom-installed distributed audio. It delivers 500 W per channel into 8 ohms or 800 W per channel into 4 ohms using closed-loop digital switching amplifiers and robust power supplies.

Its compact 2U chassis can be rack mounted using the included removable mounting brackets or used as a conventional standalone component. The highly efficient class D design requires no cooling fans during normal operation, making it well suited to equipment racks and dedicated installation spaces.

Two blue McIntosh Watt Meters display the power output of the individual channels, while multicolor LED indicators show channel status. The rear panel provides balanced and unbalanced inputs, standard 5-way speaker binding posts, Power Control triggering, and automatic signal-sensing power management.

Features

• 500 W per channel into 8 ohms
• 800 W per channel into 4 ohms
• Closed-loop digital switching amplifier design
• Balanced and unbalanced analog inputs
• Dual blue McIntosh Watt Meters
• Power Guard® signal overload protection
• Sentry Monitor™ short-circuit protection
• Power Control 12 V triggering
• Automatic on/off signal sensing
• Fanless operation
• 2U rack mounting with removable brackets

Specifications

Power Output: 500 W per channel into 8 ohms; 800 W per channel into 4 ohms

Number of Channels: 2

Total Harmonic Distortion: 0.05%

Signal-to-Noise Ratio: 98 dB below rated output

Dynamic Headroom: 2.7 dB into 8 ohms; 3.7 dB into 4 ohms

Damping Factor: >85 into 8 ohms; >45 into 4 ohms

Rated Power Band: 20 Hz–20 kHz

Frequency Response: +0, -0.9 dB from 20 Hz–20 kHz

Circuit Configuration: Closed-loop digital switching

Output Type: Direct coupled

Balanced Inputs: 1

Speaker Connections: 5-way binding posts

Dimensions (H × W × D): 4-5/16" × 17-1/2" × 21" (110 × 445 × 533 mm)

Weight: 21.5 lb. (9.8 kg)