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10 HDMI ports: 4K/60Hz; HDCP 2.3; Rec. 2020; 4:4:4 color spacing; Dynamic Lip-sync
8K/60Hz & 4K/120Hz on 1 HDMI input & 2 HDMI outputs
HDR (static HDR); Dynamic HDR; HDR10+; HLG; Dolby Vision
Quick Media Switching; Auto Low Latency Mode; Quick Frame Transport; Variable Refresh Rate
13.2 Audio Channels; eARC/ARC; Apple AirPlay 2; Bluetooth; Spotify Connect
Dolby Atmos; DTS:X Pro; Auro-3D; IMAX Enhanced; 360 Reality Audio; MPEG-H Audio
Connects with Control4 Certification; Works with Crestron Home Certification
Audyssey MultEQ XT32
 
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. 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.
 
Specifications
 
Connectivity
Multi-Channel Outputs Balanced
13.2
Multi-Channel Inputs Unbalanced
7.1
Multi-Channel Outputs Unbalanced
15.2
Stereo Inputs Balanced
1
Stereo Inputs Unbalanced
8
(including 1 Moving Magnet Phono)
Stereo Outputs Unbalanced
2
Digital Coaxial Input
2
Digital Coaxial Output
0
Digital Optical Input
2
AES/EBU Balanced Input
0
HDMI Input
7
HDMI Output
3
USB
1 Type A
Component Input
3
Component Output
1
Composite Input
4
Composite Output
2
Subwoofer 2 Output
Yes
(discrete signal from subwoofer 1)
Network Connection
1
Max # of audio channels in Zone A
15
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
 
HDMI Features
Resolution and Refresh Rates
8K/60Hz and 4K/120Hz on 1 HDMI input and 2 HDMI outputs (4K/60Hz on all other ports)
HDCP
2.3
4:4:4 Color
Yes
Rec. 2020 (BT.2020)
Yes
3D video pass-through
Yes
Dynamic Lip-sync
Yes
ARC
Yes (on 1 output)
eARC
Yes (on 1 output)
Video Scaling
8K Upconversion
High Dynamic Range (HDR)
HDR (static HDR), Dynamic HDR, HDR10+, HLG, Dolby Vision (including low latency)
Quick Media Switching (QMS)
Yes (on 8K/60Hz and 4K/120Hz ports)
Auto Low Latency Mode (ALLM)
Yes (on 8K/60Hz and 4K/120Hz ports)
Quick Frame Transport (QFT)
Yes (on 8K/60Hz and 4K/120Hz ports)
Variable Refresh Rate (VRR)
Yes (on 8K/60Hz and 4K/120Hz ports)
 
Processing
Total Harmonic Distortion (DSP Bypass)
0.005%
Dolby Processing
Dolby Atmos, Dolby Surround Upmixer
DTS Processing
DTS-X, Neural:X Surround Upmixer, DTS Virtual:X
Auro Processing
Auro 3D, Auro-Matic, Auro 9.1, 10.1
Pure Stereo DSP Bypass Mode
Yes
MPEG-H Audio
Yes
360 Reality Audio
Yes
IMAX Enhanced
Yes
Room Correction
Audyssey MultEQ XT32, Dynamic EQ / Dynamic Volume, DSX
 
Control
Third Party Control
RS232, Web IP, IR Input
Tone Controls
9 Band Equalizer, Bass and Treble
OSD Overlay on HDMI Output
Yes
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
 
General Specifications
Channel Formats
13.2, 7.1, 5.1, Stereo
Microphone and stand included
Yes
Network Features
Wi-Fi dual band 2.4/5GHz, Apple AirPlay 2, Bluetooth, Spotify Connect
Unique Crossover Frequency, Each Speaker
Yes
Special Features
Rear Panel USB-Apple Dock, HDMI in standby, Apple AirPlay 2, Bluetooth, Spotify Connect
 
Weights & Dimensions
Unit 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)
Unit Weight
31 lbs (14 kg)
Shipping Weight
55 lbs (25 kg)