10
SERIAL
NUMBER
CAUTION
RISK OF ELECTRIC SHOCK
DO NOT OPEN
MC 4 5 1 DUA L M O NO PO W E R AMP L I FI E R
McINTOSH LABORATORY, INC., BINGHAMTON, NY
HANDCRAFTED IN USA WITH US AND IMPORTED PARTS
+++
-
8Ω 4Ω 2Ω COM
-
COM
++
4Ω 8Ω
+
2Ω
SOLID STATE (300W) OUTPUTS
CLASS 2 WIRING
VACUUM TUBE (150W) OUTPUTS
CLASS 2 WIRING
POWER
CONTROL
OUT
IN
AUTO OFF
ENABLED
DISABLED
CROSSOVER
(MONO MODE)
VACUUM TUBE
INPUT
INPUT MODE
BALANCED
UNBALANCEDBAL
UNBAL
MONO SOLID STATE/
INPUT
AMPLIFIER MODE
MONO
SEPARATEBAL
UNBAL
300
250 400
550
180
130 800
1k100
CROSSOVER POINT
Hz
+1. 2
-3
+3-6
0
VACUUM TUBE LEVEL
dB
HDMI (ARC)
DA2 DIGITAL AUDIO MODULE
USB AUDIO
COAX 2
COAX 1
MCT OPTICAL 2 OPTICAL 1
DIGITAL AUDIO INPUTS
SERIAL
NUMBER
POWER CONTROL
MAIN
TRIG 1
TRIG 3
PASSTHRU
TRIG 2
TRIG 4
120V 50/60Hz
30 WATTS
IR IN
RS232
EXTERNAL CONTROL DATA PORTS
5
3
1
6
4
2
SERVICE
PORT
MC
GND
L
R
1R
BAL R
MAIN OUTPUT
BAL L BAL R BAL L
L
R
OUTPUT 1
BAL R BAL L
L
R
OUTPUT 2
SERIAL
NUMBER
1L 2R 2L 3R 3L
L
R
FIXED
OUTPUT
BALANCED INPUTS
1 42 3
MM
L
R
UNBALANCED INPUTS PHONO INPUTS
CAUTION
RISK OF ELECTRIC SHOCK
DO NOT OPEN
UNBAL UNBAL UNBAL
Connection to AC Power should
be the LAST connection made
Right Loudspeaker System
Audio
Preamplier
LOW
MID / HIGH
Connection Diagram