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McIntosh Labs

MX123 A/V Processor

SKU: MC-MX123

$12,500.00
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In-Store Only

The MX123 A/V Processor marries a long tradition of uncompromising McIntosh sound quality with the latest home theater technologies to bring you an unsurpassed luxury home entertainment experience. As of September 2021, the MX123 supports 8K/60Hz and 4K/120Hz resolutions and refresh rates. It can also upscale lower resolutions to 8K to produce the best possible picture quality.

To satisfy the video needs of your home cinema, the MX123 has 7 HDMI inputs and 3 HDMI outputs. All HDMI inputs and outputs support HDCP 2.3; Rec. 2020; 4:4:4 color spacing; Dynamic Lip-sync; and 3D Video pass-through. To create the most life-like and realistic picture possible, all MX123 HDMI ports support a myriad of high dynamic range formats: HDR (static HDR); Dynamic HDR; HDR10+; HLG; and Dolby Vision (including low latency). These technologies will ensure every moment of a video is displayed at its ideal values for depth, detail, brightness, contrast, and color - on a scene-by-scene or even a frame-by-frame basis.

Of the 10 HDMI ports, 1 input and 2 outputs are 8K/60Hz and 4K/120Hz compatible1 with the rest supporting 4K/60Hz.

The 3 HDMI ports that are 8K/60Hz and 4K/120Hz compatible offer many other advanced features:

Quick Media Switching (QMS) that eliminates the delay that can result in blank screens before content is displayed.
Enhanced HDMI video features to improve gameplay performance by bringing an added level of smooth and seamless motion and transitions, including:
Auto Low Latency Mode (ALLM) that allows the ideal latency setting to automatically be set allowing for smooth, lag free and uninterrupted viewing and interactivity.
Quick Frame Transport (QFT) that reduces latency for smoother no lag gaming, and real time interactive virtual reality.
Variable Refresh Rate (VRR) that reduces or eliminates lag, stutter and frame tearing for more fluid and better detailed gameplay.

The MX123 is also fully compatible with all the leading home theater surround sound and object-based 3D audio formats such as Dolby® Atmos (including Dolby Atmos Height Virtualizer); DTS:X® Pro; Auro-3D®; Sony's 360 Reality Audio, an immersive audio experience utilizing Sony’s spatial sound technology; and MPEG-H Audio. MPEG-H Audio, primarily developed by Fraunhofer IIS, 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.

Audio Return Channel (ARC) and Enhanced Audio Return Channel (eARC) functionality is included on 1 of the HDMI outputs. ARC allows a compatible TV to send audio data to the audio video processor over the HDMI cable, eliminating the need for separate audio cables. The more advanced eARC offers greater bandwidth so higher resolution audio formats such as DTS-HD Master Audio™, DTS:X®, Dolby TrueHD, and Dolby Atmos can be sent through the HDMI cable.2

The 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 theater speaker configurations; 2 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.

Additional connections include: 4 digital audio inputs; 1 balanced and 8 unbalanced analog 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 analog stereo outputs; 2 composite video outputs; and 1 component video output.

The MX123 is IMAX® Enhanced compatible. 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 utilizes 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 theater.

Music streaming options3 on the MX123 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®. It offers multiroom audio, Siri voice control, and enhanced playback. TuneIn is also included for further music streaming options – including McIntosh Music. To assist with wireless streaming performance and reliability, it includes 2.4/5GHz dual band support. An ethernet port that lets you make a hardwired connection to your network is also included to aid in producing the best possible music streaming experience.

Audyssey MultEQ® XT32 is included and will calibrate the MX123 to your home theater’s unique acoustical properties, letting it deliver the clearest and most balanced earth-shattering sound possible. Each discrete audio channel has its own 32-bit premium Digital-to-Analog Converter (DAC) to produce the best audio quality. Bass and treble tone controls plus a 9-band equalizer offer additional fine-tuning. The MX123 also gives you the flexibility to create 2 additional zones in your house and send select audio and/or video to each zone.

The MX123 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. It has also received Works with Crestron Home certification from Crestron, a global leader in advanced smart home technology. Crestron Home unlocks the full potential of a smart home. It's the complete package for any size project, delivering a simpler, smarter user experience for homeowners, remarkably fast configuration and deployment for integrators, and the confidence that comes with renowned, best-in-class Crestron control hardware.

The MX123 can be paired with a variety of home theater amplifiers such as our MC303, MC255, MC257, MC8207, MI347, MI254, or MI128 amplifiers and any of our floor standing, in-wall or in-ceiling speakers to create an enviable and enjoyable cinema experience in the comfort of your home. 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 aluminum end caps. Contact us at Liptons Audio Video to learn more.

1) The use of Ultra High Speed HDMI cables is required to take full advantage of the MX123's HDMI capabilities.
2) TV must be compatible with ARC/eARC.
3) All services may not be available in all regions; certain services may not yet be enabled for all apps; subscriptions may be required.

Processing/Shipping Time

All online orders are typically processed within 1-2 business days. Orders received after 1pm EST or on weekends will be processed on the next business day.

Our business hours are Monday to Friday from 10am to 5pm EST.

Due to our inventory management practices, we do not maintain a large stock of products; instead, most items are sourced from our suppliers upon order. We do focus on having a broad selection of brands and models for in store demo purposes. This may impact shipping times, as items are procured and prepared for shipment as soon as possible. If your item is not in stock, we will send you an email to update you on the status of your order. We appreciate your understanding and patience.

  • Standard Delivery for in stock items is between 2-3 business days within Ontario & Quebec, 3-5 business days for Eastern Canada and 4-7 business days for Western Canada. Northern or remote Canadian customers should contact us to confirm shipping availability and costs. During peak sales periods (for example Black Friday, Cyber Monday and Boxing Day/Week) up to an additional 5 (five) business days may be needed.
  • Items not in stock will be shipped to our Newmarket store and then shipped to you. Turnaround time may depend on the manufacturer/distributor. If a manufacturer or distributor has stock of the item, then we can normally expect to receive the product within 10 business days at which point we will immediately ship it to you.
  • If we become aware that delivery time to you will exceed 16 business days we will contact you to confirm the order or review options.

If your product is damaged, defective, or dead on arrival you are eligible for a refund or exchange within 15 days of the product being delivered to you.  

If you are not satisfied with your purchase and would like to request an exchange, please note the following:

  • All returns and exchanges will only be accepted on products with no damage due to misuse and have all original packaging, accessories, manuals and the original sales receipt.
  • Refunds paid by credit card/PayPal will be returned in the same method payment was received when possible. Wire Transfer payments will be refunded in the form of company check or E-Transfer. For exchanges with a difference in value, the balance will be charged or refunded in the same method as the original payment was received.
  • Liptons Audio Video reserves the right to assess whether the product is defective or not. Products with physical damage will not be accepted for refund or exchange.
  • Exchanges will be offered only on non-special order items with return shipping at the buyer's expense and must be shipped with insurance reflecting the transaction value and must ship via a trackable courier/delivery company. Exchanges will only apply to unopened products received in new condition
  • Products with non matching serial numbers to either the packaging or the recorded Serial number associated with the transaction are not eligible for refunds or exchanges
  • Products with modified or missing serial numbers/UPC codes or other identifying information are not eligible for refunds or exchanges
  • Products that are not returned with all original packaging, equipment, accessories, manuals and software will not be refunded or will be charged a restocking fee at the discretion of Liptons Audio Video.
  • Products must be new and show no signs of use. Any sign of use – Including installation, scratches or other signs of use such as physical marking, painted grills, screw holes, cut wires or similar would not be returnable
  • Equipment sustaining damage from operation or misuse will be deferred to the manufacturer's warranty and replacement policies. 
  • Replaced items will be exchanged for the same model
  • If a product you purchased from us proves to be defective within 15 days from purchase, we will replace it with an equivalent new unit at no charge. If the item is returned through shipping, the exchange will be processed once we receive the parcels & confirm that the product is not working. Exchange processing will take 10-20 business days from the day we receive the parcel.


Final Sale Items/Exclusions


  • Special order items including cut to length cabling and custom furniture
  • Headphones/earbuds/in-ear headphones for hygienic reasons
  • Turntable cartridges/styli
  • Projector lamps
  • Installed in-ceiling, in-wall speakers or subwoofers
  • No refunds or exchanges on products purchased for commercial use.
  • Clearance, consignment items.

Online Order Returns/Exchanges Process

Please contact us to begin our online return process at info@liptons.ca. Once we have received the details about your order, we will generate a Return Merchandise Authorization (RMA) number and send you the RMA form to be completed and sent back with the parcel.

Pack the item back in its original packaging with all parts, accessories and manuals. We recommend packing the item into an additional box meant for shipping. Return shipping costs are the responsibility of the customer. Any damages that incur during return shipping will also be the responsibility of the customer.

In the event the item was offered free shipping, the original shipping charges and handling fees, for the returned item(s), will be deducted from the refund. If the item is refused and returned to Liptons Audio Video without record of cause and evidence of damage any return freight costs will also be deducted from the refund.

In Store Returns & Exchanges

Returns on damaged, defective and DOA products, as well as exchanges can be made in store. Please note our store hours https://liptons.ca/pages/contact and be sure to bring your receipt or online order confirmation. 

Product Warranty

All new products carry full manufacturer warranty which varies for each product category and manufacturer. Refer to the manufacturer’s warranty information for exact details. 

Demo products come with either the full manufacturer warranty or the balance of manufacturer warranty unless otherwise specified.

Open Box products come with either the full manufacturer warranty or the balance of manufacturer warranty unless otherwise specified.

Used and Consignment pieces will have individually specified warranty.  If no warranty is listed, no warranty is available, but the unit has been tested in store and determined to be working properly unless otherwise specified.

Installation Warranty

All Liptons Audio Video installations come with a one-year warranty against workmanship performed by us. Defective equipment covered under manufacturer warranty is subject to a removal and reinstallation charge of one hour at our current installation rates. Installation warranty claims can be made within one year of installation date by phone at 905-898-7133 or email at info@liptons.ca

If you have any questions or concerns regarding product returns, exchanges and warranty claims, please call is at 905-898-7133 or email info@liptons.ca

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