Question about DHD NTX-2139 Car Audio Amplifier

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Why does my amp stay in protect mode?

When I hook my amp up and give it power it stays in protect mode.

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The most common reason an amplifier goes into or remains in protect mode is shorted output transistors. To eliminate other possible reasons for it to go into protect, read the following page.

Troubleshooting - Amp in Protect Mode

Posted on Aug 04, 2008

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The amp has either been pushed past it's limits or has a component thats fried.

Posted on Dec 13, 2014

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You have a wiring problem somewhere either power or possibly your speaker wiring

Posted on Nov 30, 2014

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1 Answer

ZX 1000.1 amp stays in protection mode


It is normal for them to go into the protect mode, If the speakers are not hooked up to it,

Nov 09, 2012 | Kicker Car Amplifiers

1 Answer

Lightning Audio b2.3000.4 is in protect mode. i removed all speaks and conected the amp directly to the battery and it still stays in protect mode. what can i do to fix this problem?


  • Only a select few things can cause protect mode with the battery only connected.
  • An installation issue. Check the Power, Ground and Remote wires. Make sure non are shorting from one terminal to the other.
  • It is still overheated and has not had time to cool down from being in thermal protect mode.
  • The amp itself is touching metal. You always want something non conductive between the amp and where it is mounted, this includes the screws being used to anchor the amp. They should never touch the metal in the car either.
  • The final thing that can cause an amp to go into protect mode while only hooked to the battery is the amp itself is malfunctioning and or defective. You can try opening the amp and look for any black spots on the circuit board where an electrical component might have smoked up or blown and replace that part.

Regards, Tony

May 21, 2011 | Lightning Audio B2.300.4 Car Audio...

1 Answer

It plays for a couple of seconds and then runs over to protect mode and stays there


usualy means there is a problem with the speakers, they may be wired wrong, short in the wires or the voice coil in the speakers themselves. best way to trouble shoot is to power the amp with no speakers hooked to it, if it only goes ito protect with the speakers hooked to it, the the problem is with the speakers, not the amp.

Aug 17, 2009 | Kicker KX400.1 Car Audio Amplifier

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protect mode usaully means that something has disrupted the power of feed lines to the subwoofer/speakers possibly fuse is blown in amp or amp is blown in which we hope not. see if you have a warrenty if blown and send back or bring it to where you purchased it from.

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It appears that the amp is going into protect mode. To eliminate external causes, read through the following page. Let me know if you have any other questions.

Amp in Protect Mode - Troubleshooting

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Tc 4002 audio car amp


The red light is normal and indicates the amp is powered up. Check your signal wires (RCA patch cords?) and speaker wires. Need more info to be of more help. What receiver are you using? How is it connected to the amp?

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Power on/off


solidus- Your amp is going into protection mode, try disconnecting the sub and see if the power will stay on then.If yhe power stays on,it is your sub-blown or shorted ect. But if it does the same as before,its to the repair shop. cooltek Mar,4/08

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Protection light


have you wired it up properly + to + and - to - and the power + and -

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hi. your amp has an internal power supply fault. problem lies in the remote turn on regulator circuit or with the pulse width modulating circuit.this fault definitely needs to be in technicians hands. cheers

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1 Answer

Amp staying in protection mode


No, this amp is not a heavy power consumer- matter of fact it takes very little power to run.Maybe you should check the fuses on the amp to see if they are what is recommended.Also check your fuse kit to your amp- your fuse might not be big enough.If neither works take it back where u got it.

Jan 01, 2007 | Soundstream XTA880.2 Car Audio Amplifier

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