Question about DHD NTX-2139 Car Audio Amplifier

3 Answers

Why does my amp stay in protect mode?

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

Posted by ROD715 on

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3 Answers

Anonymous

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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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FastHarley

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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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Anthony Carman

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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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It is normal for them to go into the protect mode, If the speakers are not hooked up to it,
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I have an xterminator xt2000d amplifier which is stuck on protection mode. It keeps on trying to switch over to full power but stays in protection mode. I unplugged speakers same thing replace fusses same...

sometimes the problem isn't noticeable. it could be a problem in the circuitry itself. how old/new is the amp? is the ground solid? what gauge is the wire? try hooking it up to the battery directly and instead of hooking up the remote wire from the head unit to the amp use a "jumper" (short wire) to connect it from the amp power wire terminal to the amp remote terminal. if its still in protect after that then the amp is bad and needs repair...
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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
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Ok check the remote wire running from the headunit to the amp should be giving v12 feed whiles headunit is on.

check or change grounding position.

take cover off the amp as the circuit may be over heating.
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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.
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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.
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If you power up the amp with the RCAs plugged in, does the woofer pop?
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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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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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