McIntosh
MI128 8-Channel Power Amplifier
- 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
Pairs well with
In stock! Ships within 1-2 business days.
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2-Year Warranty
Complimentary shipping & returns
If you have any questions, you are always welcome to contact us. We'll get back to you as soon as possible, within 24 hours on weekdays.
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Shipping Information
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FAQ’s
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Contact Us
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Overview
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 dealerto 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)
FAQs
Please read our FAQs page to find out more.
Do you price match?
Yes. We match any authorised dealer, including big-box retailers. If you find the same product at a lower price, contact us and we'll match it.
Do you offer free shipping?
Yes — free shipping on every order, with 2-day delivery available on most products. Easy returns and exchanges are included.
Where is your showroom?
We're at 6362 Alder Drive, Houston, Texas. The showroom lets you hear and compare reference-level systems in person before making any decisions. If you're considering a larger purchase or installation, it's well worth the visit.
Can I buy online without visiting the showroom?
Yes. The full product range is available through the online store with free nationwide shipping. For more complex system builds, speaking with one of our advisers first tends to lead to a better result.
Do you offer financing?
Yes. Special financing is available through the BrandSource Credit Card for qualifying purchases, allowing you to spread payments over time with no annual fee. Promotional rebate savings are also available periodically. See the financing page for full details.
Do you install systems as well as sell equipment?
Yes — installation is central to what we do. We design and install whole-home audio and video, home theaters, media rooms, outdoor audio, lighting and motorised shades, and full smart home automation.
Do you provide support after installation?
Yes. We provide ongoing service and support to ensure systems continue performing as intended — not just on installation day, but over the long term.