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I have a diesel nsx-3001 amp and it powers up fans come on but no sound. A red light is on, I've heard it's in protection mode? Please help. :(

Posted by Anonymous on

6 Suggested Answers

6ya6ya
  • 2 Answers

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Posted on Jan 02, 2017

xtpfly
  • 1 Answer

SOURCE: protection light on

go to power acoustiks website at: poweracoustik.com then tech support look at how to insatll an amp

Posted on Jun 29, 2007

  • 631 Answers

SOURCE: mac-505 amp


Disconnect all speaker wires and signal cables from the amp. If it powers up normally (no protect light), the wiring needs to be checked. If it still goes into protect, the amp likely has blown output transistors.

Posted on Dec 21, 2007

  • 631 Answers

SOURCE: DUB 2502 Protection Mode help

The most common reason for an amp to go into or remain in protect mode is shorted output transistors. To eliminate other possible causes, read through the following page. Let me know if you have any other questions.

Amp in Protect Mode - Troubleshooting

Posted on Aug 07, 2008

  • 631 Answers

SOURCE: Audiobahn DUB Mag Audio 2502 Amplifier

If the protection light is on, the amplifier likely has shorted output transistors. To eliminate other possible causes, read through the following page.

Amp in Protect Mode - Troubleshooting

Let me know if you have any other questions.

Posted on Aug 09, 2008

blueextc3221
  • 15935 Answers

SOURCE: orion cs150.2 amp power light "red"for protected need "green"

remove the load (subwoofer)...
ensure the power and remote have 12V (remotoe only when the car is on)....
And make sure the ground is a good one - sanded and screwed.
If you now turn on the car, and the red light for protection still stays on, your problem is internal, and it will need to be serviced. This is not something that you can crack open and fix, as there are lethal amounts of stored energy in the power supply and capacitors.

If the light goes on, youe sub(s) is/are at fault. Check the impedence with a multimeter set to OHMs and read the voicecoil. It should read pretty near to 4 or 8 ohms.

But since your amp is the only piece new to the equasion, chances are the problem lies within the amplifier.

It either has fried components, or your subwoofer(s) are wired to a low enough impedence that your amplifier does not like.

With more info... model #s voicecoil configurations I can help you better. I will c/p an answer I wrote recently regarding amplifier failure.

Posted on Jan 06, 2009

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1 Answer

I own a Aiwa NSX DS50 Home Theater Audio System. It hasn't worked for some time now. As soon as i turn the system on it shuts off completely. About ten seconds after turning off the red light next to...


Generally speaking, an amp attempts to protect itself from heat, shorts, overloads and operator exuberance by refusing to turn on or stay on.

Overloads can be from excessive periods of high output or marginally low impedance loading by the speakers; and shorts would be wiring issues or a speaker blowing up.

You should be able to feel if it's hot. WHY is it overheating? Make sure it has sufficient ventilation on all sides and that vent holes are not blocked by dust balls. Ensure the fan (if equipped) is running as designed (some only operate on demand). Clean dust and debris from it.

If the amp comes back on after cooling, you're lucky. They only have so many self-protection cycles in their lives so continuously resetting or cycling their power without addressing the cause can do more harm than good.

If it protects immediately on a cool power up you should disconnect the speaker connections and try it 'naked'. If it comes up then diagnose which lead(s) are shorted. If it does not come up the problem is internal and should be left to an experienced and competent hands-on tech.

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The amp dont come on but power protecter light is red.


Sounds like something is shorting out and it is in protection mode. Check that the wiring is correct and there are no bad spots on the power wires. Unhook the power before starting your evaluation and leave disconnected until you think you've found the problem then rehook the power source. This will give the system time to reset if it needs to.

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Power light turns from green to red protect mode and then there is no sound coming from my speakers


there are 2 reasons for it to be going into protect mode 1 is heat 2 is the load on it. if it is going into protect mode soon after it starts there is a problem with the speaker. if it is after it has been on for a while it is that the amp itself is overheating. hope this answers your question

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Amp on "protect" mode


Hi, what you need to do is unplug all the connections to the amp. The amp goes into protection when the circuitry over heats.\
First decrease all your gains to minimal volume.
Connect your 12+V, remote, and ground.
See if the protection light comes on then.
Next plug in your RCA cables.
Check protection light.
Then plug in your subwoofer cables.
See if you are still in protect mode.
Hopefully everything works alright again.
Just slowly increase the gain to see what the cut-off is. Make sure you aren't dropping the ohmage too low on the amplifier. Check manual for correct wiring and such.

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My amp stays in protection mode


Does it go into protect in the vehicle if you disconnect the speaker wires from the speaker terminals of the amp?


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Amp in protection mode


Disconnect all speaker wires and signal cables from the amp. If it powers up normally (doesn't go into protection), the wiring needs to be checked. If it still shuts down, the amp likely has blown output transistors.

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