8
FUSE
PUSH
R OUTPUT
8
Ω
4
Ω
2
Ω
8
Ω
4
Ω
2
Ω
L OUTPUT
DATA PORTS
3
1
4
2
IR IN
RS232
EXT
CTRL
MAIN
TRIG 1
TRIG 2
MA8950 INTEGRATED AMPLIFIER
McINTOSH LABORATORY, INC., BINGHAMTON, NY
HANDCRAFTED IN USA WITH US AND IMPORTED PARTS
POWER CONTROL
OUTPUTS
PASSTHRU
INPUT
SERVICE
PORT
CLASS 2 WIRING
CLASS 2 WIRING
2
L
R
FIXED
1
PWR AMP
1
2
3
4
5
GND
6
R
MC
MM
L
R
L
CAUTION
RISK OF ELECTRIC SHOCK
DO NOT OPEN
SERIAL
NUMBER
120V 50/60Hz
4.4A
T 6.3AL 250V
UNBALANCED
INPUTS
PHONO
BALANCED
OUTPUTS
USB AUDIO
DA2 DIGITAL AUDIO MODULE
HDMI (ARC)
COAX 2
COAX 1
MCT
OPTICAL 2
OPTICAL 1
DIGITAL AUDIO INPUTS
SERIAL
NUMBER
1. Main Power:
Attach the included power cable here.
2. Main Fuse Holder:
This is where the main fuse to
power the unit is located.
3. Fixed Outputs:
An RCA connector cable will
produce a fixed, non-adjustable Volume level signal
from here.
4. Outputs (1 and 2):
Use these ports with an RCA
cable to send the signals to a subwoofer or power
amplifier. Connect included Jumper Plugs (see next
page) to Output 1 and PWR AMP to use onboard amp
(see Page 16).
5. PWR AMP Input:
The included Jumper Plugs (see
next page) connect Output 1 to the onboard power
amplifier (see Page 16). Also used as a loop for room
correction with Outputs 1 and 2.
6. Unbalanced Inputs (1-6):
You can connect up
to six high-level unbalanced signals using an RCA
connection with these ports.
7. GND Input:
This is where you would put a ground
wire from a turntable to prevent noise.
8. MC Phono Input:
A turntable with a moving coil
cartridge will plug in here with an RCA cable.
9. MM Phono Input:
A turntable with a moving
magnet cartridge will plug in here with an RCA cable.
10. Balanced Inputs:
Plug in an XLR connector cable
(see next page) to these ports for balanced signals.
11. Loudspeaker Output Terminal Posts:
Connect
loudspeakers to these posts (see Page 10).
12. Optical Inputs (1 and 2):
These ports accept
optical connections for digital signals.
13. Coax Inputs (1 and 2):
You will connect coaxial
cables for digital signals into these ports.
Navigating the Rear Panel
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15 16
17
18 19
20
21
22
11
23