MI128 8-Channel Power Amplifier

Ideal for Distributed Audio Systems & Two-Channel Audio Systems

Type: Digital
120 Watts x 8-Channels into 8 Ohms
150 Watts x 8-Channels into 4 Ohms
Power Guard®, Sentry Monitor™, On/Off signal sensing, Bussable inputs
2U rack mountable

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3 Year Limited Warranty

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MI128 8-Channel Power Amplifier

Ideal for Distributed Audio Systems & Two-Channel Audio Systems

3 Year Limited Warranty

Print this page

COMPARE

Ask an Expert

Add to WishlistRemove From Wishlist

The versatile MI128 8-Channel Digital Amplifier can be used in many applications ranging from distributed audio to home theater to stereo listening. It delivers 120 Watts into 8 Ohm speakers or 150 Watts into 4 Ohm speakers via highly sophisticated closed loop digital switching amplifiers that are paired with extremely robust power supplies to produce performance levels that are rarely achieved in distributed audio.

It has installer-friendly physical dimensions and is 2U rack mountable via the included mounting ears (the mounting ears 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.

On the front panel, multi-color LED indicators display the status of each channel. On the back are unbalanced inputs for each channel plus 2-pole Phoenix style push-in speaker terminals. Also located on the back are volume controls for volume balancing, along with 2 digital audio inputs (either coax or optical) that can be bussed, and channel summing circuits for easy mono signal distribution.

Other features included on the MI128 are: Power Guard^® signal overload technology that prevents overdriving the speakers; our 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; BUS input & outputs to easily distribute a stereo signal to multiple outputs and/or multiple amplifiers; individual channel inputs; 12 Volt triggering capabilities; and 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 MI128 includes many McIntosh design cues including a black glass front panel housing an illuminated McIntosh logo, along with a familiar form factor that is highlighted with silver trim. Contact your local dealer to learn more about integrating the MI128 into your custom audio installation.

Specifications
Electronic Specifications
- FTC Power Output Rating
  
  120 W
- Power Output per Channel
  
  120 W into 8 ohms
  150 W into 4 ohms
- Number of Channels
  
  8
- Total Harmonic Distortion
  
  0.05%
- S/N below rated output
  
  95dB
- Dynamic Headroom
  
  8 ohms: 2.1dB
  4 ohms: 3.3dB
- Damping Factor
  
  8 ohms: >65
  4 ohms: >32
- Rated Power Band
  
  20Hz to 20kHz
- Frequency Response
  
  +0, -0.5dB from 20Hz to 20kHz
Control
- Remote Power Control
  
  Yes
- Multi-Channel DB25 Cable
  
  N/A
Connectivity
- Speaker Binding Post Type
  
  2-pole Phoenix style push-in speaker terminals
General Specifications
- Circuit Configuration
  
  Closed loop digital switching
- Circuit Design
  
  Digital
- Mono Bridge
  
  N/A
- Mono Parallel
  
  N/A
- Output Type
  
  Direct Coupled
- Meters
  
  No
- Meter Light Switch
  
  No
- Balanced Input
  
  0
- Front Panel
  
  Glass with removable rack mounting ears
- Illumination
  
  Direct LED
- Chassis Style
  
  Black painted steel
- BTU Rating
  
  1000 BTU/h
Weights & Dimensions
- 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
  
  22 lbs (10 kg)
- Shipping Weight
  
  38.4 lbs (17.4 kg)

Downloads

Product Literature	User Documents
MI128 Power Amplifier Brochure (1.13 MB)	MI128 Power Amplifier Owner's Manual (3.86 MB) MI128 Power Amplifier Connection Diagram (1.57 MB)

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