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 Audio & Video

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

I have a 1200 watt G-Max sub amplifier and it just went into protect mode


Turn down the volume or power settings on it since its pulling too much power and shutting off for a few sconds to keep from blowing. Depending on the amp and speakers your using dont bridge the channels. If it won't come out of protect mode then unhook everything and just hook power, ground, and remote and wee what happens. If it comes on again and stays on then amp is blown.

Aug 11, 2010 | Jl Audio Car Audio & Video

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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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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?

Jul 24, 2008 | MTX 4002 Car Audio Amplifier

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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

Mar 04, 2008 | Sony XM-2002GTR Car Audio Amplifier

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Protection light


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

Aug 13, 2007 | Power Acoustik GOTHIC OV4-600 Car Audio...

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Amp stays on all the time


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

Aug 04, 2007 | Infinity Reference 7541a Car Audio...

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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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