Question about Ample Audio A 1100DX Car Audio Amplifier

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Protection light on my a1100dx ample amp help plz

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  • Perry Babin May 11, 2010

    If the amp is in protect mode, it probably has shorted output transistors. To eliminate other possible problems, do the following. I'll assume that you've checked the amplifier's on-board fuses.

    Disconnect all speaker wires from the 'amplifier's speaker terminals' and disconnect RCA/signal cables from the amp. If it powers up normally, the speakers/wiring need to be checked. If it still shuts down (goes into protect mode), the amp almost certainly has shorted output transistors and will need to be repaired.

    If the amp only shuts down when it's driven to relatively high volume, you need to confirm that you have sufficient power supply voltage. With your multimeter set to DC volts, the black meter probe on the ground terminal of the amp (not on the point where the ground wire connected to the vehicle) and the head unit on (so the amp will have remote voltage applied), touch the red probe alternately to the B+ and remote terminals of the amp. If the voltage is below ~11 volts, you need to check the wiring feeding whichever line is too low. If both the B+ and remote turn-on lines are low and your battery is fully charged, you may have a bad ground connection.

    Let me know if you have any other questions.



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Check ground thats the problem when power light is on it means amp has power but a short is bein caused from a sub about to blow or a ground connection hope this helps

Posted on May 22, 2009

  • joshua cheevers May 22, 2009

    check ground thats the problem when power light is on it means amp has power but a short is bein caused from a sub about to blow or a ground connection hope this helps



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1 Answer

I have a A1200 DX ample audio amp i hooked my 2 12" speakers anf as soon as i turnd it on one ov my speakers started to smoke rill bad im shore its tost but what did i do wrong

You might not have done anything wrong. The thing to do now is get a meter and put it on the amp so that you can see if the amp is putting out straight voltage at the speaker connections.

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I have a 1000 watt amp and the other night the stupid protect light came on and it wont work anymore

that means u fried the amp or try unhooking ur speakers to see if u fried them

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What does the red and green light mean ???

red and green light? there is most likely a protection and a power light. The red I assume would either be a protection light or a clipping light signal. Does the amp kick off then these lights kick on red then to green?

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My amp would turn on and off and one time it just stopped working its a powerful amp want to fix

Disconnect all speaker connections and rca cables. Leave power, ground and remote wires intact. Try turning on again. If you still have a protection light your amp is faulty. Hopefully you have warranty. Contact Kicker to have them repair. .A thumbs up would be greatly appreciated if this answer is helpful to you.

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Hi i'm having harmon kardon avr 85 amplifier it has turned on in protection mode (red light around the switch) how to get out from this problem wht's the solution for this plz help me as soon as...

Hi try and reset all the setting . First swcth off and on again check the back and front of the amp. use the manual to reset all .

If it does not work, then the amp. is expressing a power problem.

Call customer service to check it out for you .

Take care.

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1 Answer

My 4 channel amp keeps going into protect mode when i power on,its not a imminet light,but it blinks once then dies out,plz help

Remove all speaker inputs and outs and just have your 12volt battery, ground and radio remote connected and power up the amp. If it turns red instantly, then the amp is shorted/blown. If it stays green, then install your speaker inputs and outs one at a time. make sure your amp is on while your doing this. if the amp goes into protect mode, take note of which wire it was for it's most likely shorted. Fix that shorted wire and the unit should stay on.

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Most of the time. If the protection light is on that means your protected. Not that there is something wrong. So if it is working then your fine.

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Generally, the power light is green and the protect light is red. If the protect light is on there could be a short in the wiring or there could be an internal fault in the amp.

Disconnect all speaker wires from the speaker terminals of the amp and disconnect signal cables from the amp. If it powers up, the wiring needs to be checked. If it still shuts down (goes into protection), the amp likely has blown output transistors.

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No audio-amp protect light come on then went

You need to check the DC voltage across the B+ and ground terminals. You also need to check the DC voltage across the remote and ground terminals. If the voltage is less than 11 volts, you need to check the B+ supply and remote wiring for breaks or open fuses. You should also check the ground connection to confirm that it's not loose.


If the voltage is OK, the output transistors are likely shorted.

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