6
What is in the box
Here is what is in the box besides all the shipping foam:
One MX123 A/V Processor
One accessory package including:
• Microphone with attached cable
• Microphone stand
• 1/2 inch male to 5/8 inch female adapter
• Two Bluetooth/Wi-Fi antennas
One manual package including this manual
One AC power cord
Where to put it
The MX123 can be placed upright on a table or
shelf, standing on its four feet. It also can be custom
installed in a piece of furniture or cabinet. The four
feet may be removed for custom installations. The
four feet together with the mounting screws should
be retained for possible future use.
Do not use
different size screws
when re-installing the feet. With
the feet removed, the MX123 requires a ventilation
cutout. Dimensions for the panel cutout and bottom
ventilation cutout are shown in Figure 02 on page
7.
Always provide adequate ventilation for your
MX123. Cool operation ensures the longest possible
operating life for any electronic instrument. Do not
install the MX123 directly above a heat generating
component such as a high-powered amplifier. If all
the components are installed in a single cabinet, a
quiet running ventilation fan can be a definite asset in
maintaining all the system components at the coolest
possible operating temperature.
A custom cabinet installation should provide the
following minimum spacing dimensions for cool
operation:
• 2 inches (5.1cm) above the top
• 2 inches (5.1cm) below the bottom
• 1 inch (2.5cm) on each side of the MX123 so
that airflow is not obstructed
• 20 inches (50.8cm) depth behind the front panel
• 1-7/16 inch (3.7cm) in front of the mounting
panel for knob clearance
Be sure to cut out a ventilation hole in the mounting
shelf according to the dimensions in the drawing. See
Figure 02 on page 7.
Front View of the MX123
Rear View of the MX123
Side View of the MX123
17-
1/2
"
44.5cm
6-
3/8
"
16.2cm
7-
5/8
"
19.4cm
13 -
1/4
"
33.7cm
17-
1/8
"
43.5cm
7-
1/8
"
18.1cm
16-
1/2
"
41.9cm
3/16
"
0.5cm
13/16
"
2.1cm
6-
9/16
"
16.7cm
10-
9/16
"
26.8cm
14-
1/2
"
36.8cm
2"
5.1cm
1-
15/16
"
4.9cm
3 (BLU-RAY)
4 (GAME)
5 (MEDIA PLAYER)
6 (CD)
ZONE 2 (4K)
MON 1 (8K)
2 (DVD)
Y
PB
PR
Y
FR
SUB
SR
SBR
HDMI IN
VIDEO
IN 2 (DVD)
IN 3 (BLU-RAY)
PB
PR
Y
PB
PR
XLR BALANCED INPUT
R
L
FR
FL
C
SW1
SR
SL
SBR
SBL
BALANCED OUTPUTS
SW2
1 (CBL/SAT)
2 (DVD)
3 (BR)
4 (GAME)
Z2 OUT
MON OUT
IN 1 (CBL/SAT)
COMPONENT VIDEO
MONITOR OUT
ANALOG AUDIO OUT
ZONE 2
ZONE 3
L
R
FR
SW1
SR
SBR
SW2
HR1
HR2
FL
C
SL
SBL
7.1 CH INPUT
UNBALANCED PRE OUT
FL
C
SL
SBL
HL1
HL2
TUNER
CBL/SAT
DVD
BLU-RAY
GAME
ANALOG AUDIO IN
L
R
PHONO
HR1
HL1
HR2
HL2
GND
2
(CD)
OPT
A/V PROCESSOR
MX123
MCINTOSH LABORATORY, INC.,
BINGHAMTON, NY
HANDCRAFTED IN USA WITH US AND IMPORTED PARTS
HR3
HL3
1 (CBL/SAT)
7 (AUX 8K)
ARC
COAX
1
(TV AUDIO)
RS232
TRIG 1
IR IN
DATA
OUT
SETUP
MIC
TRIG 2
CD
MP
HDMI OUT
MON 2 (8K)
1
2
3
4
5
6
CAN ICES-3(B)/NMB-3(B)
1
2
HL4/WIDE
HR4/WIDE
HR3
HL3
DIGITAL AUDIO IN
(CBL/SAT)
(DVD)
NETWORK
POWER SUPPLY
5V/1.5A
USB
5V/1A
BLUETOOTH
/ Wi-Fi ANT
BLUETOOTH
/ Wi-Fi ANT
SERIAL
NUMBER
75 WATTS
120V
50 60Hz
FOR INDOOR
USE ONLY
eARC
Figure 01– MX123 Dimensions
