Manual-
MA 4
MULTICHANNEL AMPLIFIER
DIGITAL
AMPLIFIER
dB Headroom
dB Headroom
dB Headroom
dB Headroom
3
6
12
24
Limit
1
Comp
Exp
Fault
Load
Ready
3
6
12
24
Limit
2
Comp
Exp
Fault
Load
Ready
3
6
12
24
Limit
3
Comp
Exp
Fault
Load
Ready
3
6
12
24
Limit
4
ON
Comp
Exp
Fault
Load
Ready
MA 4
OPERATORS MANUAL
Quick Start
Basic MA 4 operation is straightforward:
1. The universal switching power supply works with 100 to 240 VAC, 50/60 Hz.
2. Make sure the front panel power switch is
off
(the unit consumes 5 watts in standby mode).
3. Connect balanced inputs (rear panel).
4. Set SENSITIVITY controls to +22 (see why on page Manual-2) (rear panel).
5. Turn the Downward EXPander ON (rear panel).
6. Set COMPressor to 10 dB (rear panel).
7. Select the appropriate HIGH PASS filter frequency (20, 40, 60 or 80 Hz on rear panel).
8. Connect speaker loads (rear panel).
9. Make sure you have adequate ventilation around the unit – see Safety Instructions.
10. Turn ON the front panel power switch. You’re good to go!
Metering shows the status of the amplifier at a glance (see page Manual-3). Headroom (with any load), dynamics control, Fault status
and Load status are indicated for each channel.
Extra Credit
For remote turn-on, fault reporting and back-up amplifier operations, and remote level control wiring, see page Manual-4.
For FAULT FLAG operation (applications and reported faults), see page Manual-3.
MA 4
ACN 001 345 482
100-240V
500 WATTS
50/60 Hz
COMMERCIAL
AUDIO
EQUIPMENT
24TJ
LISTED
R
C
US
MADE IN U.S.A.
RANE CORP.
Class 2 Wiring
OUTPUTS
Active Low
Use Rane VR 2 or 20 k
Ω
pot
HIGH-PASS
20Hz
40Hz
60Hz
80Hz
ON
4
+
–
+
–
+
–
+
–
+
–
+
–
+
–
+
REMOTE LEVEL
4
4
FLAG
3
2
1
FAULT
Vr Vc
Vr Vc
Vr Vc
Vr Vc
–
+
–
+
–
+
–
+
–
+
–
+
–
+
–
+
–
3 2 1
MASTER
SLAVE
COMP
4 3 2 1
1 2 3 4
+ –
+ –
+ –
+ –
Vr Vc
Vr Vc
Vr Vc
Vr Vc
+ –
+ –
+ –
+ –
INPUTS
MODE
For continued
grounding
protection
do not remove
screw
13
22
dBu
SENSITIVITY
4
3
13
22
dBu
SENSITIVITY
4
2
13
22
dBu
SENSITIVITY
4
1
13
22
dBu
SENSITIVITY
4
EXP ON
3
INT EXT
LOAD
2
INT EXT
LOAD
1
INT EXT
LOAD
4
INT EXT
LOAD
4
3
2
1
ON
4
3
2
1
ON
+ –
+ –
+ –
+ –
SOURCE 4
SOURCE 3
SOURCE 2
SOURCE 1
WEAR PARTS: This product contains no wear parts.
Installation
• No rear mounting hardware required.
• Allow adequate ventilation to keep ambient temperature around the amplifier below 104˚F (40˚C).
• Fan cooled with inset intake on left side and inset exhaust on right side (no filter)
• Amplifier heat load in BTU/hr at 100/240 VAC
º 347/463
BTU/hr All amplifiers in standby
º 3825/3245 BTU/hr All amplifiers on, no signal
º 5681/4820 BTU/hr All amplifiers driven, pink noise, 12 watts avg. 4:1 crest
º
Note: The heat load of 1 watt is 116 BTU/hr
