Question about QSC MX1500A 2-Channel Amplifier

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My QSC MX700 has power but no signal

My QSC MX700 has power, because the fan will run, but the LEDs will not come on nor send signal to my speakers.

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4 Suggested Answers

6ya6ya
  • 2 Answers

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Posted on Jan 02, 2017

davesoucy
  • 148 Answers

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

Grubhead
  • 5047 Answers

SOURCE: hi wat is useualy parts defect wen i turn on my

The answer is quiet simple! The parts on the heatsink that get really hottest!

Posted on Dec 20, 2009

ripleymojica
  • 643 Answers

SOURCE: I have a QSC MX700

Sounds like you need to retrace your solder connections on main board.

Posted on May 09, 2011

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1 Answer

Qsc hpr153i rattle


Hi,

Please specify a bit more, does the rattle is physical(Enclosure structure) or electronically hear thru speaker(Power Amp Common Issue)? I have the solution for the amp issue, let me know.

Mar 20, 2013 | QSC Audio Products QSC HPR153I 12 SPEAKER

1 Answer

My qsc plx 3402 will not power up. I believe I shorted it out with my speaker cables


Most likely...shorted speaker wires, defective speakers or too many cabinets wired together can blow a amplifier channel in an instant. Manufacturers use to mount protection fuses on the exterior of equipment but people started replacing 3 amp with 25 amp automobile fuses and destroying internal circuits. You could pop the cover to look for a power supply protection fuse (same value replacement please) BUT be careful as there are sustained voltages after the unit is disconnected from the AC outlet that hold enough power to make this type work dangerous. I recommend sending it to a professional repair shop for a checkout and estimate.

Oct 19, 2012 | QSC Audio Players & Recorders

1 Answer

I have a QSC MX700 and it becomes louder after 20 minutes.


Sounds like you need to retrace your solder connections on main board.

May 08, 2011 | QSC MX1500A 2-Channel Amplifier

1 Answer

How to hook up 18"


Hello!
SO I am going to give you more of a signal layout from the turntables (or whatever you use to DJ) to the speakers.
Turn tables-> Mixer-> Eq-> Amp-> Sub and other speakers.
The part that I am not understanding is why do you need the QSC amp if you have a powered sub? The powered part of that means that there is a built in amp, which eliminates the need for the QSC amp unless you are sending that sound to main (non sub) speakers.
Hope that helps!

May 03, 2011 | Audio Players & Recorders

1 Answer

How do I bridge my QSC GX 3 amp to run one speaker cabinet?


For QSC amps the GX series are not bridgeable. You will have to run one speaker to each channel.

Mar 22, 2011 | QSC GX3 Amplifier

1 Answer

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.

Jan 29, 2011 | QSC RMX 4050HD 2Channel Amplifier

1 Answer

MAckie 1604 VLZ Pro Mixer, running QSC 1850 with jbl's from main outs. I would like to hook up powered subwoofers. What is the correct pathway? kenshireman@msn.com


The best way is to use a two-way crossover between the mixer and the amplifiers. In your case, the low output from teh crossover would go to the powered subs, the highs to the QSC. Use the crossover adjustment to set the frequency crossover point to get the sound quality you require.

Dan

Mackie 1604 ---> Crossover --- Highs ---> QSC --->Speakers
'
-----> Crossover --- Lows ---> Powered Subs.

Jan 27, 2011 | Mackie 1604 Vlz3 16 Channel Mixer

2 Answers

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...

Sep 07, 2009 | QSC ISA 300Ti Amplifier

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