Question about QSC MX1500A 2-Channel Amplifier

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One of my channel stop working in my qsc mr 1500a is this fixible and how much rounding of would it be to fix it

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Sounds like the output chip has been fried just take it to a tech not unless u know what u r doing then just fix it youself

Posted on Oct 22, 2011


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Qsc amp no sound 0utput

With amps loss of sound is mostly connected with the devices found on the heat sink. Some amps have transistors for each channel. Others have a single IC often marked with the letters STK. If the amp uses the IC then these can loose one channel then the other. Replacment is the only cure.

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Mar 28, 2010 | QSC MX1500A 2-Channel Amplifier

1 Answer

How do i bridge my mx 1500a because I dont have a manual for it? can u tell me which terminal i can used thanks in advance.


There's a switch on the rear, put this in bridge mode.
Connect you speaker (not under 4 Ohm) on the two red outputs.
Here's your manual.

Good luck,

Jan 30, 2010 | QSC MX1500A 2-Channel Amplifier

1 Answer

Question similar to ...connect to home theater... What kind of fan noise do these amps (QSC MX 1500a) have if using in a home theater or stereo system in the typical room?

I work with these amplifiers every day and i can tell you that they not made with quietness in mind.
They are mainly used in a club/disco environment and often mounted in a equipment rack hidden in a closet. Excellent/tough amplifiers if you want power and clean sound ,but
You may find their noise level uncomfortable in a living room.
Hope this help Merry Christmas

Dec 21, 2009 | QSC MX1500A 2-Channel Amplifier

1 Answer

My QSC GX3 has a red light that turned on (on the front panel). The channel is not working. Is this a fuse or something else?

You should check the speaker set, maybe it's short circuit.
Try remove the speaker set from the unit, than switch on the amplifier again, if the red light still on, surely the final drive is damages( Transistors or IC's).
Replace it with new ones.

Oct 18, 2009 | QSC MX1500A 2-Channel Amplifier

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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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Where can i get the used power amps?

i have one qsc 1500a 1000watts awsome doesn't many hours on it.
New Orleans La,70056 were are you from

Mar 08, 2009 | QSC MX1500A 2-Channel Amplifier

1 Answer

QSC 1420 pwr amp

The weaker signal caused by leaky capacitor and change value resistor is need to replaced with a new one so it's works normal again. Your tech did is re soldering the cold solder he did not replaced some defected parts.

Hope it may help you;


Jan 07, 2009 | QSC MX1500A 2-Channel Amplifier

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