McIntosh MI128 Digital Amplifier

The MI128 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.

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 today to learn more about integrating the MI128 into your custom audio installation!

• Loudspeaker 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
• BUS input & outputs to easily distribute a stereo signal to multiple outputs and/or multiple amplifiers
• Individual channel inputs
• 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.

• Power Output per Channel: 120 Watts into 8 Ohms; 150 Watts 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 20,000Hz
• Remote Power Control: Yes
• Multi-Channel DB25 Cable: N/A
• Speaker Binding Post Type: 2-pole Phoenix style push-in speaker terminals
• 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
• 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)
• Weight: 22 lbs (10 kg); Shipping Weight 38.4 lbs (17.4 kg)