Macrom M3A250 User Manual
Low Level
Input
Gain Control Adjust
ST / mono
selector
Flat
Response
Low pass
filter control
Mono
ST
8V 0,2V
1V
Input
Left
Right
30 600
60Hz
Flat
Filter
Control / Filter
- Mode -
High
Low
Mono
ST
8V 0,2V
1V
Input
Left
Right
30 600
60Hz
Flat
Filter
Control / Filter
- Mode -
High
Low
Mono
ST
Mono
ST
M3A.250
Input setting
Filter setting
Input
Left
Right
8V 0,2V
1V
8V
0,2V
8V 0,2V
1V
Flat
Filter
Control / Fil
High
Low
20Hz20Hz
20kHz
30Hz 600Hz
20Hz20Hz
20kHz
30
600
30 600
150Hz
Illustration Guide
For more informations <www.macrom.ch>
2 CHANNEL POWER AMPLIFIER
FILTER
Low pass
or
High pass
or
8V 0,2V
1V
Flat
Filter
Control / Filter
High
Low
or
high pass
filter control
20Hz20Hz
20kHz
30Hz 600Hz
M3A.250
R
-
+
+
L
-
Bridged
-
+
Power Terminal
Fuse
+BATT
-GND
Remote
20A
Speaker Output
Stereo
Bridged
Output/Power connection
R
-
+
+
L
-
Bridged
-
+
Speaker Output
Left
Right
+
-
+
-
R
-
+
+
L
-
Bridged
-
+
Speaker Output
Bridged
+
-
+
-
CAR CHASSIS
Power Terminal
+BATT
-GNDRemote
CAR CHASSIS
Power connection
or
Technical Data
IHF max power handling 350 Watts
Configuration “1 - 2”
RMS Power 4 ohm Stereo load at 14,4 V 50 x 2 watts
RMS Power 2 ohm Stereo load at 14,4 V 70 x 2 watts
RMS Power 4 ohm Bridged load 140 x 1 watts
Frequency response (+0/-1 dB) 10 - 45,000 Hz
Signal to noise ratio >95 dB
Input sensitivity 200 - 8,000 mV
Input impedance 22.000 ohm
Crossover tipe variable
Crossover frequency & filter slop (High-pass) 30 to 600/12 Hz/dB
Crossover frequency & filter slop (Low-pass) 30 to 600/12 Hz/dB
Dimensions (w * h * d) 265 x 50 x 195 mm
Illustration Guide
For more informations <www.macrom.ch>
Min load 2ohm
Min load 4ohm
2
CHANNEL POWER AMPLIFIER
AMP
Speaker output
+
-
+
-
4 ohm
One 4 ohm
speaker
OK
AMP
Speakers output
+
-
+
-
4 ohm
4 ohm
4 ohm
3 or more
4 ohm speakers
NOT OK
AMP
Speakers output
+
-
+
-
4 ohm
4 ohm
Two 4 ohm
speakers
OK
AMP
Speaker output
+
-
+
-
2 ohm
One 4 ohm
speaker
NOT OK
IMPEDANCE REQUIREMENT
2 OHM MINIMUM
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