McIntosh MI128 8 Channel Power Amplifier

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 us to learn more about integrating the MI128 into your custom audio installation.

Features

• 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
• 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 to automatically turn other connected McIntosh components on and off.
• 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.
• Made in USA

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

  No

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

CONNECTIVITY

• Speaker Binding Post Type

  2-pole Phoenix style push-in speaker terminals

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)

Support

• Datasheet
• Manual
• Connection Diagram