- 120 Watts into 8 Ohms
- 150 Watts into 4 Ohms
- 2U rack mountable
- 8-Channel amplifier for distributed audio, home theater or stereo listening
- Channel summing circuits for easy mono signal distribution
MI128
8-Channel Digital Amplifier
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: Loudspeaker 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.
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Specifications
Electronic Specifications
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- Power Output per Channel
- 120 Watts into 8 Ohms
150 Watts into 4 Ohms
-
- Number of Channels
- 8
-
- Total Harmonic Distortion
- 0.05%
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- S/N below rated output
- 95dB
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- Dynamic Headroom
- 8 Ohms: 2.1dB
4 Ohms: 3.3dB
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- Damping Factor
- 8 Ohms: >65
4 Ohms: >32
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- Rated Power Band
- 20Hz to 20kHz
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- Frequency Response
- +0, -0.5dB from 20Hz to 20,000Hz
Control
-
- Remote Power Control
- Yes
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- Multi-Channel DB25 Cable
- N/A
Connectivity
-
- Speaker Binding Post Type
- 2-pole Phoenix style push-in speaker terminals
General Specifications
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- Circuit Configuration
- Closed loop digital switching
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- Circuit Design
- Digital
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- Mono Bridge
- N/A
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- Mono Parallel
- N/A
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- Output Type
- Direct Coupled
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- Meters
- No
-
- Meter Light Switch
- No
-
- Balanced Input
- 0
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- Front Panel
- Glass with removable rack mounting ears
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- Illumination
- Direct LED
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- Chassis Style
- Black painted steel
Weights & Dimensions
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- 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)
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- Weight
- 22 lbs (10 kg)
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- Shipping Weight
- 38.4 lbs (17.4 kg)
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Downloads
Product Literature User Documents - MI128 Power Amplifier Brochure (1.12 MB)
- MI128 Power Amplifier Owner's Manual (3.86 MB)
- MI128 Power Amplifier Connection Diagram (1.57 MB)
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MX100
A/V Processor
- 5 HDMI ports: HDCP 2.2, 18Gbps & 4:4:4 Color
- 4K Ultra HD; Dolby Vision, HDR10 & HLG
- 11.2 Audio Channels; eARC
- Dolby Atmos, DTS:X
- 2U rack mountable
-
MI347
7-Channel Digital Amplifier
- Designed for home theaters
- 3 Front Channels: 250 Watts into 8 Ohms or 300 Watts into 4 Ohms
- 4 Surround Channels: 125 Watts into 8 Ohms or 200 Watts into 4 Ohms
- 3U rack mountable
- Power Guard®; Sentry Monitor™
-
MI254
4-Channel Digital Amplifier
- 250 Watts into 8 Ohms
- 300 Watts into 4 Ohms
- 2U rack mountable
- Perfect for home theater surround sound speakers
- Can also be used in distributed audio
-
WS500
In-Wall Loudspeaker
- Fully enclosed speaker that fits in 2x4 walls
- Perfect for distributed audio or home theaters
- Up to 250 Watt Power Rating
-
WS300
In-Wall Loudspeaker
- Fully enclosed speaker that fits in 2x4 walls
- Perfect for distributed audio or home theaters
- Up to 250 Watt Power Rating
-
CS200
In-Ceiling Loudspeaker
- Perfect for custom installed distributed audio
- Also great as home theater surround sound speakers
- 15 to 250 Watt Power Rating
ASK AN EXPERT:
MI128
8-Channel Digital Amplifier
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Welcome to the family of McIntosh owners. This is the Warranty for your new McIntosh Home Electronic Product (the “Product”). Your Product has been designed to give many years of trouble-free performance. Nonetheless, failures do sometimes occur even with equipment as well-built as McIntosh’s. Therefore, please read this Warranty carefully, because it contains rights, as well as limitations, exclusions, and obligations, which in the event of such a failure may be very important to you. If after reading it thoroughly, you have any questions about the Warranty, please do not hesitate to write or telephone McIntosh at the address or phone number shown on the back of this warranty. Please note that this is the only Warranty which McIntosh provides for your Product, and that no one, including your dealer, has any authority to either modify or expand upon this Warranty. If your dealer has offered or made any warranties or representations concerning the Product which differ from those contained in this Warranty, they are strictly between you and the dealer, and will neither be binding upon McIntosh nor change any of the provisions in this Warranty. Please also note, that if your Product ever does require Warranty service, obtaining such service will be much easier if you have completed and returned the enclosed Warranty Registration Card. So please take a minute to fill out and return the Registration Card now, before you become too distracted by the great sounds coming from your new McIntosh Product!
Scope and Duration of Warranty
Subject to the terms and conditions stated below, McIntosh Laboratory, Inc. (“McIntosh”) warrants to the original owner that this Product shall be free from defects in workmanship or materials for a term of three (3) years from the date when it was purchased from an Authorized McIntosh Dealer. Provided, however, that rather than the three (3) years of coverage afforded the Product generally, where applicable, vacuum tubes contained in our Products are warranted for 90 days from the date of purchase, hard disc drives and projector lamps contained in our Products are warranted for one (1) year from the date of purchase.
Limitations on Persons and Products Covered by this Warranty
This Warranty and all rights provided here under are limited to the original owner. In the event that the original owner transfers ownership of the Product prior to expiration of the three-(3) year term, this Warranty shall terminate in its entirety upon the date of such transfer. In addition, McIntosh does not warrant in any way Products which are purchased from anyone who is not an Authorized McIntosh Dealer, or which have had their Serial Numbers altered or defaced. Therefore this Warranty is void and inapplicable if this Product has been purchased from someone other than an Authorized McIntosh Dealer, or has had its original Serial Numbers altered or defaced.
Geographical Limitations
McIntosh directly warrants all Products which are purchased in the United States or Canada, and Warranty only applies while such Products are used in the United States or Canada. Products purchased outside the United States or Canada, used outside the United States or Canada, and failures occurring outside the United States or Canada, are covered under separate warranty terms as determined by the Authorized McIntosh Distributor in the applicable country. Questions regarding the availability and scope of warranty coverage in such situations should be directed to the Authorized McIntosh Distributor in the applicable country.
Limitations on Third Party Services and Data Sources
Certain McIntosh Products include an interface that enables access to services (including data) that are provided by third parties unrelated to McIntosh (such as, by way of example only, Amazon Cloud, Spotify, Gracenote, etc.). Some of these services require separate customer subscriptions and some do not; and some may be supported by and compatible with the McIntosh Product while others may not. Merely providing the capability to access such services is not to be construed as making McIntosh the provider of, or responsible for, the services, or for continuing to support or make such access available; and McIntosh expressly disclaims any such responsibility. Because McIntosh cannot control the providers of such services or the services themselves, and similarly cannot control the communication systems and networks that connect the Products’ interfaces to the services, McIntosh cannot and does not warrant against, and shall have no liability of any kind for, any of the following that are related to third party services, the providers of those services, or the systems or networks by which the McIntosh Product communicates with the services: (i) unavailability, lack of compatibility or functionality, interruption, discontinuance, or loss of service, or other unsatisfactory performance, act, or omission; (ii) loss or unauthorized use or disclosure of, or damage to, personal information, recordings, or other data; (iii) reduced functionality of the McIntosh Product; or (iv) any other loss or damage of any kind. McIntosh likewise does not warrant against, and shall have no liability for, any failure of its Products to satisfactorily process any externally sourced data where such failure is attributable in whole or in part to the makeup of the data itself or to a non-McIntosh product, system, or service that is the source of the data or that provides access to the data.
What McIntosh will do under the Warranty
In the event of any defect covered by this Warranty, McIntosh shall without charge provide all parts, materials, and labor necessary to restore the Product to its original specifications. After repair, McIntosh shall return the Product to its owner at the owner’s expense. In the alternative, McIntosh may at its sole option either replace the Product without charge, or if replacement is not commercially practicable or repair or replacement cannot be accomplished within a reasonable time, McIntosh may refund the purchase price of the Product, subject where appropriate to reasonable depreciation for actual use in accordance with applicable laws, in full satisfaction of its warranty obligations. McIntosh or its Authorized Service Agency will undertake to complete the repair and return of the Product as soon as circumstances permit, unless prevented by causes beyond their reasonable control.
Limitations on McIntosh’s Obligations under the Warranty
McIntosh’s sole Obligation under this Warranty shall be to repair or replace the Product, or at its option refund the purchase price, as provided for hereinabove. McIntosh does not warrant against, nor shall it be liable for, any of the following: removal or installation charges; shipping expenses either to or from McIntosh or its Authorized Service Agency; loss of use; property damage of any kind; or other incidental or consequential damages or losses of any kind.
Note: Some states do not allow exclusion or limitation of consequential damages, so the foregoing exclusions may not apply to you.
Parts and Occurrences that are not Covered by the Warranty
This Warranty does not cover any of the following: (a) glass panels, cabinetry, trim, or other appearance items (except where they are defective at the time of original sale and the Product is delivered for repair within the first thirty (30) days thereafter); (b) batteries, or damage to the Product caused by failure of batteries; (c) or damage to the Product caused by failure of projector lamp; (d) loss of, or damage or corruption to, digital data, files, or other information content of any kind, regardless of cause; (e) failures arising from accident, catastrophe, misuse, neglect, or failure to properly connect and operate the Product in accordance with the accompanying instructions; (f) failures arising from improper installation or removal of the Product; or (g) failures arising from any tampering, alteration, or damage to the Product or attempted servicing of the Product by anyone other than McIntosh or an Authorized McIntosh Service Agency; and McIntosh shall have no liability or obligation of any kind with respect to any of the foregoing types of failures.
What the Owner must do to obtain service under this Warranty
To obtain service under this Warranty, the owner must at the owner’s expense arrange for any necessary de-installation of the Product, and deliver or ship the Product to McIntosh at the address below, or to an Authorized McIntosh Service Agency, properly packaged, prepaid, and insured at the owner’s expense. In addition, the owner must provide evidence that the Product is at the time of delivery within the scope of his Warranty, by either having completed and submitted to McIntosh on a timely basis the accompanying Warranty Registration Card, or by including the original sales receipt (photocopies are not acceptable) with the Product when it is delivered for repair.
What the Owner must Pay For
As noted above, the owner must pay any expense of removing the Product from its installation, and must pay any expenses for delivery of the Product to McIntosh or the Authorized McIntosh Service Agency. Upon return of the Product to the owner following repair, it shall be the owner’s responsibility to pay for the shipping charges incurred in return of the Product, as well as to arrange and pay for any re-installation which may be required. In addition, it shall be the owner’s obligation to pay for any repairs made to any Product for which the owner has neither completed and submitted the Warranty Registration Card at the time of purchase nor included the original sales receipt with the Product when delivered for service, at McIntosh’s or its Authorized Service Agency’s then-current repair rates.
How to learn where the nearest Authorized McIntosh Service Agency is, or obtain answers to other questions concerning this Warranty
In order to learn the name and address of the nearest Authorized McIntosh Service Agency, obtain instructions for shipment of a covered Product to McIntosh, or obtain the answers to any other questions you may have concerning this Warranty, you may telephone McIntosh’s Customer Service Department between the hours of 9:00 a.m. and 4:30 p.m. Eastern Time, Monday through Friday, at +1-888-979-3737 (or +1-607-723-3512) or write to McIntosh at 2 Chambers Street, Binghamton, New York 13903-2699, Attention: Customer Service Department or visit the “Contact Us” area of the McIntosh Web Site at www.mcintoshlabs.com.
Note: This Warranty gives you specific legal rights, and you may also have other rights which vary from state to state.
For the protection of consumers, authorized McIntosh dealers are PROHIBITED FROM SELLING THIS PRODUCT AS NEW ONLINE OR BY MAIL OR PHONE. If you are considering purchase of this product online or by mail or phone, you risk purchasing from an unauthorized seller or receiving a used product, either of which will void the manufacturer’s warranty.
If you have any questions please contact McIntosh at (888) 979-3737 or feedback@mcintoshlabs.com.