McIntosh MX123 8K


McIntosh MX123

The MX123 A/V Processor marries a long tradition of uncompromising McIntosh sound quality with the latest home theatre technologies

McIntosh MX123 8K

The MX123 A/V Processor marries a long tradition of uncompromising McIntosh sound quality with the latest home theatre technologies.

McIntosh MX123

It is compatible with all the leading home theatre surround sound and object-based 3D audio formats including Dolby® Atmos (including Dolby Atmos Height Virtualiser), DTS:X® Pro, and Auro-3D®.

It’s also fully compatible with modern 4K Ultra HD video sources and can upscale lower resolutions to 4K Ultra HD for the best possible picture quality.

The McIntosh MX123 features upgraded digital audio processing capabilities that results in 2 more discrete audio channels, bringing the MX123 to 13.2 discrete audio channels compared to 11.2 in the previous model.

These 13.2 discrete channels are available via both balanced and unbalanced audio outputs that can be used in a variety of home theatre speaker configurations.

Two additional unbalanced outputs offer further connection flexibility.

DSD and ALAC playback support have been doubled to DSD128 and ALAC 192kHz for better high-resolution audio performance.

For the video needs of your home theatre, the MX123 has 7 HDMI inputs and 3 HDMI outputs, with each being HDCP 2.2/2.3 compliant.

They all also have 18Gbps of bandwidth to support High Dynamic Range (HDR) formats Dolby Vision, HDR10 and HLG; 4K Ultra HD at 50/60Hz; 4:4:4 colour spacing; Rec. 2020; and 3D video pass-through.

Enhanced Audio Return Channel (eARC) functionality is included on 1 of the HDMI outputs.

eARC offers improved bandwidth so the MX123 can receive higher resolution audio from your TV to produce the best possible sound quality.

Additional connections include: 4 digital audio inputs; 1 balanced and 8 unbalanced analogue stereo audio inputs (including 1 dedicated as a Moving Magnet phono input to connect a turntable); an unbalanced 7.1 multi-channel audio input; 3 component and 4 composite video inputs; 1 USB Type A input; 2 unbalanced analogue stereo outputs; and 2 composite and 1 component video outputs.

It has received Connects with Control4 Certification from Control4®, a leading global provider of smart home automation solutions, with the implementation of their Simple Device Discovery Protocol (SDDP), allowing it to be effortlessly integrated into Control4 automation systems to further enhance the user experience.

the McIntosh MX123 has also received Works with Crestron Home certification from Crestron, a global leader in advanced smart home technology.

An exciting new feature on the MX123 is IMAX®Enhanced.

IMAX Enhanced is a set of stringent performance standards established by IMAX and DTS® to create a consistent and higher bar for image and sound performance on premium devices.

It utilises a sophisticated, advanced algorithm designed to produce the highest-quality, sharpest 4K HDR images.

IMAX and DTS will also partner with award-winning Hollywood sound mixers to use a special variant of the DTS:X codec technology included in the MX123 to deliver an IMAX signature sound experience in your home theatre.

Another exciting new feature is MPEG-H Audio.

Primarily developed by Fraunhofer IIS, MPEG-H Audio is an open ISO standard and the industry’s most advanced audio system for UHD-TV and streaming.

It supports both immersive sound and the ability for users to adjust elements in the audio to their preferences.

MPEG-H has been on the air since 2017 on all TV networks in South Korea under the ATSC 3.0 standard.

It was also selected for new broadcast standards to be launched in Europe, China and Brazil.

Streaming options1 on the MX123 have been upgraded from the previous model.

The McIntosh MX123 now includes Apple® AirPlay 2® along with Bluetooth® and Spotify Connect for easy streaming from your mobile devices.

AirPlay 2 is an Apple technology designed to control home audio systems and speakers in any room – with a tap or by just asking Siri – right from an iPhone®, iPad®, HomePod, or Apple TV®.

Offering multiroom audio, Siri voice control, and enhanced playback. TuneIn is also included for further music streaming options – including McIntosh Music.

To assist with streaming performance and reliability, wireless connectivity has been improved to include 2.4/5GHz dual band support.

The McIntosh MX123 can be paired with a variety of home theatre amplifiers such as their MC303MC255MC257MC8207MI347MI254, or MI128 amplifiers.

Front panel buttons or a comprehensive remote control allow for easy system operation.

It’s complete with McIntosh design fundamentals of a backlit black glass front panel with an illuminated logo, control knobs, an easy to read display, and aluminium end caps

Specifications McIntosh MX123

Specifications McIntosh MX123


  • Multi-Channel Outputs Balanced


  • Multi-Channel Inputs Unbalanced


  • Multi-Channel Outputs Unbalanced


  • Stereo Inputs Balanced


  • Stereo Inputs Unbalanced

(including 1 Moving Magnet Phono)

  • Stereo Outputs Unbalanced


  • Digital Coaxial Input


  • Digital Coaxial Output


  • Digital Optical Input


  • AES/EBU Balanced Input


  • HDMI Input

HDCP 2.2/2.3, High Dynamic Range (Dolby Vision, HDR10 and HLG), 4K Ultra HD at 50/60Hz, 4:4:4 color, Rec. 2020, 3D video pass-through

  • HDMI Output

HDCP 2.2/2.3, High Dynamic Range (Dolby Vision, HDR10 and HLG), 4K Ultra HD at 50/60Hz, 4:4:4 color, Rec. 2020, 3D video pass-through, (1) eARC

  • HDBT Output


  • USB

1 Type A

  • Component Input


  • Component Output


  • Composite Input


  • Composite Output


  • Subwoofer 2 Output

(discrete signal from subwoofer 1)

  • Network Connection


  • Max # of audio channels in Zone A


  • Additional Zone Outputs

Zone 2: HDMI audio/video, component video, composite video, analog stereo audio
Zone 3: Analog stereo audio

  • Advanced Connections

Ethernet Web interface and firmware update, IP-based control, Web Data Streaming, Apple AirPlay 2, Bluetooth, Spotify Connect



  • Total Harmonic Distortion (DSP Bypass)


  • Dolby Processing

Atmos/True HD/Digital Plus&EX/Pro Logic IIz, IIx

  • DTS Processing

DTS:X/Virtual:X/HD Master & High Res. Audio/ES/96/24, Discrete & Matrix6.1/Neo:6/Express/Neural-X

  • Auro Processing

Auro 3D, Auro-Matic, Auro 9.1, 10.1

  • Pure Stereo DSP Bypass Mode


  • Video Scaling

4K Upconversion

  • High Dynamic Range (HDR)

Dolby Vision, HDR10 and HLG


  • Third Party Control

RS232, Web IP, IR Input

  • Tone Controls

9 Band Equalizer, Bass and Treble

  • OSD Overlay on HDMI Output


  • Input-Output Format Indicators

9 in and 9 out

  • Control of McIntosh Sources

Yes, by handheld remote, 1 Data Out, 2 Power Control Trigger jacks

  • Channel Formats

13.2, 7.1, 5.1, Stereo

  • DSP Room Correction

Audyssey MultEQ XT32, Dynamic EQ / Dynamic Volume, DSX

  • Microphone and stand included


  • Network Features

Wi-Fi dual band 2.4/5GHz, Apple AirPlay 2, Bluetooth, Spotify Connect

  • Unique Crossover Frequency, Each Speaker


  • Special Features

IMAX Enhanced, Rear Panel USB-Apple Dock, HDMI in standby, Apple AirPlay 2, Bluetooth, Spotify Connect


  • Dimensions (W x H x D)

17-1/2″ (44.45cm) x 7-5/8″ (19.37cm) (including feet) x 19-1/2″ (49.53cm) (including front panel, knobs, rear panel connections and USB drive)

  • Weight

31 lbs (14 kg)

  • Shipping Weight

55 lbs (25 kg)


Since it was launched in October 2019, The MX123 A/V Processor has become a must have audio and video processor for countless home theaters.

It launched with 4K/60Hz compatibility, but as technology has progressed and as McIntosh adheres to their philosophy of continuous product improvement, all new MX123 A/V Processors will support 8K/60Hz and 4K/120Hz video resolutions and refresh rates.

The MX123 will also be able to upscale lower resolutions to 8K.

Of its 10 HDMI inputs and outputs, one of the inputs and two of the outputs will have 8K/60Hz and 4K/120Hz support (all 10 will continue to support 4K/60Hz).

The three HDMI ports that are 8K/60Hz and 4K/120Hz compatible will also offer many other advanced features including Quick Media Switching (QMS); Auto Low Latency Mode (ALLM); Quick Frame Transport (QFT); and Variable Refresh Rate (VRR).

In addition to these exciting video upgrades, the MX123 will continue to offer an impressive list of audio capabilities: 13.2 audio channels; Dolby Atmos (including Dolby Atmos Height Virtualizer); DTS:X Pro; Auro-3D; Sony’s 360 Reality Audio; MPEG-H Audio; IMAX Enhanced; eARC/ARC; Apple AirPlay 2; Bluetooth; Spotify Connect; and Audyssey MultEQ XT32. To facilitate integration into home automation systems




McIntosh Heritage Founded in 1949 by Frank McIntosh and Gordon Gow McIntosh is known for offering distinguished home audio systems that deliver the ultimate experience in music and film. Offering products for two-channel stereo sound systems and multi-channel home theaters with surround sound, McIntosh continues to define the ultimate home audio entertainment experience for discriminating listeners around the world. Their iconic blue Watt output meter is globally recognised as a symbol of quality home audio. With a McIntosh home stereo system or home theater, listeners have the ability to create their own luxury audio experience – and truly live their music. McIntosh products are designed and handcrafted at their Binghamton, NY factory by their dedicated employees who share a passion for music and the McIntosh heritage. Since their inception, McIntosh has been powering some of the most important moments in music history and pop culture. From President Lyndon Johnson's inauguration speech to Woodstock to the famous Grateful Dead "Wall of Sound," McIntosh has not only witnessed history, they have shaped it.