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4. Inside Settings
JP3
JP4 JP5
JP11
Phantom Power
MIC1 : JP3
MIC2 : JP4
MIC3 : JP5
MIC4 : JP11
Phantom on / off jumper
The MA200 has been shipped with these jumpers in the OFF position. For each microphone input a jumper is
available. When you put a jumper to the ON position, phantom power will be supplied to the microphone input
involved so you can use condenser microphones. In this case NO unbalanced jacks should be used! Phantom
power does not damage dynamic balanced microphones.
Power supply fuse
(inside the housing)
When this fuse blows, replace it by the same type: 20A quick blow. When this happens frequently, contact your
nearest dealer.
Now you are ready to build your solid sound system and our extra features will be of great help.
Note: In our policy of continuous improvement, changes can appear without prior notice, including the user
manual.
Troubleshooting
No power
: Check whether the “on/off” switch is in the on position and whether the power cord has been inserted
properly. If these two have been checked and still the MA200 remains off, the fuse might be blown.
No sound
: Check all the wires and loudspeaker selectors.
At least the master and one source should be turned clockwise.
Check whether the pre amp out is connected to the power amp in.
In the worst case your MA200 is in protective mode.
Please check your loudspeaker wiring and loads.
Operate your MA200 within normal conditions.
Distorted sound
: Your input signal is too high.
Didn’t you connect a line level source to a microphone input?
You might also be drawing too much power from your MA200 and the loudspeaker impedance
might be too low (minimum 50 Ohm for 100V use).
Check the speaker wiring and load with an impedance tester. Turn down the master level.
Hum and buzz
: Please check your wiring and grounding, maybe you created a ground loop.
See that all equipment linked are drawing power from the same power supply.
Your radio might get its signal from the cable radio. In this case you have created a ground loop
and a ground loop isolator between the cable signal and your radio antenna input will be the
solution.
