Question about QSC MX1500A 2-Channel Amplifier

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One channel of my Qsc rmx 2450 power amplifier keeps cliping

When clip it does the the speakers are on and off

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  • 243 Answers

Check speaker impedance as starting point.

Posted on Nov 08, 2013

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davesoucy
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SOURCE: QSC ISA 280 Stereo Power Amp stopped working

This is a very precise questions as QSC amp are pretty rare and high end electronics equipment. There is no way getting an answer other than getting the amp at a sound shop for repair, wich might go for a visit at QSC anyway. From a sound shop repairman...

Posted on Sep 08, 2009

  • 166 Answers

SOURCE: qsc mx 2000a left channel go into protek mode

Does it do it with nothing connected to the inputs and outputs? If yes, something internal.. anything loose in there (is it moved alot and something could have fallen inside of it)

Posted on Mar 28, 2010

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The output of the mixer goes to the input opf the QSC rmx850.

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My amps stays in the clip mode where as the light on the two channel stays red


http://www.retrevo.com/support/QSC-RMX-4050HD-Amps-manual/id/23107ci658/t/2/

Page 7...

CLIP: red, to the left of each Gain control.

Normal indication: illuminates whenever the amplifier is driven beyond full power. The LED's brightness indicates the amount of distortion. Distortion that causes only brief flashing may not be audible.

During muting, the indicator fully illuminates. This occurs during normal "On-Off" muting.

Abnormal indication:

•Bright red illumination while the amp is being used indicates either thermal muting or a shorted output.

•If the amplifier overheats, the fan will run at full speed, and operation should resume within one minute. Allow the fan to run, and make sure the amplifier ventilation is adequate.

•A shorted or overloaded output circuit will cause excessive Clip flashing and possible overheating.

•If distortion is audible without a Clip indication, the problem is either before or after the amplifier. Check for damaged speakers or overloaded signal source. The amplifier Gain control should be in the upper half of its range to prevent input overload.

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3 Answers

My EP2500 died, the capacitors are swollen on the top in the power supply.


Unless you are a qualified audio service technician, you should refer repair of this unit to an authorized Behringer service depot. The capacitors you refer to can store lethal amounts of electrical charge. Also, Behringer service manuals and schematics are notoriously difficult to get.

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Quiet Amp


sounds like you need a preamp. i would need more info to be sure. good luck

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QSC ISA 280 Stereo Power Amp stopped working


This is a very precise questions as QSC amp are pretty rare and high end electronics equipment. There is no way getting an answer other than getting the amp at a sound shop for repair, wich might go for a visit at QSC anyway. From a sound shop repairman...

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