McIntosh MX123

2
Thank you from all of us at
McIntosh
You have invested in a precision instrument that will
provide you with many years of enjoyment. Please
take a few moments to familiarize yourself with
the features and instructions to get the maximum
performance from your equipment.
List of Figures
Figure 01– MX123 Dimensions ............................ 6
Figure 02– Custom cutout dimensions ................. 7
Figure 03– MX123 Rear View ............................. 8
Figure 04– Mini plug for RS232 connection ........ 9
Figure 05– DB9 connector pin layout .................. 9
Figure 06– IR 3.5mm connector........................... 9
Figure 07– Setting the Remote Control Lock ....... 9
Figure 08– Power control (trigger) mini plug ..... 11
Figure 09– Data Out mini plug .......................... 11
Figure 10– MX123 Front panel ....................... 12
Figure 11– Display in Setup Mode ..................... 14
Figure 12– Browser Setup Menu ........................ 14
Figure 13– Sample Browser Warning screen ..... 15
Figure 14– Speaker Positions and abbreviations 17
Figure 15– Auro-3D layout example .................. 17
Figure 16– Dolby Atmos Enabled speakers ....... 18
Figure 17– Audyssey® main listening position .. 28
Figure 18– Speaker angles .................................. 28
Figure 19– Audyssey
®
Setup Start ..................... 29
Figure 20– Audyssey
®
Beg in Test ...................... 29
Figure 21– Speaker Detection ............................. 29
Figure 22– Microphone positioning ................... 29
Figure 23– Measurements complete ................... 30
Figure 24– Dynamic EQ .................................... 30
Figure 25– Audyssey
®
error message ................ 30
Figure 26– Audyssey
®
restore ............................. 30
Figure 27– Error table ........................................ 31
Figure 28– Re-packing diagram ......................... 34
Copyright 2021 © by McIntosh Laboratory, Inc
The MX123 Audio/Visual Processor marries a long tradition of uncompromising quality with the
latest home theater technologies to bring you an unsurpassed luxury entertainment experience.
• 8K Video Support
• 8K/60 and 4K/120 Fast refresh rates
• HDR, Dynamic HDR and HDR 10+, HLG
and Dolby Vision
• eARC, Dynamic Lip-Sync as well as
the latest decoding and post-processing
formats
• Variable Refresh Rate (VRR) reduces
or eliminates lag, stutter and frame
tearing for more uid and better detailed
gameplay
• Quick Media Switching (QMS) for movies
and video eliminates the delay that can
result in blank screens before content is
displayed
• Quick Frame Transport (QFT) reduces
latency for smoother no lag gaming, and
real time interactive virtual reality
• Auto Low Latency Mode (ALLM) allows
the ideal latency setting to automatically
be set allowing for smooth, lag free and
uninterrupted viewing and interactivity
If you need further technical assistance, please
contact your dealer who may be more familiar
with your particular setup including other
brands. You can also contact McIntosh with
additional questions or in the unlikely event of
needing service.
McIntosh Laboratory, Inc.
2 Chambers Street
Binghamton, New York 13903
Technical Assistance: (607) 723-3512
Customer Service: (607) 723-3515
Fax: (607) 724-0549
Email: support@mcintoshlabs.com
Website: mcintoshlabs.com
Make a Note
For future reference, you can jot down your
serial number and purchase information here.
We can identify your purchase from this
information if the occasion should arise.
Serial Number:
Purchase Date:
Dealer Name