Question about Power Acoustik LT-980/2 Car Audio Amplifier

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Disconnect all of the speaker wires and signal cables from the amplifier.


If the amp still goes into protect when you power it up, the output transistors are likely shorted.



Posted on Oct 22, 2007

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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

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

1 Answer

I have a spl fx2 1800 that i got from a guy for 40 bucks and it is frozen in the protect mode is there a way i can get it to come out of the protect mode with out sending it in to the shop

The most likely culprit when an amp goes into protection mode is the power wiring. Check your ground wire, it should be solidly connected to the vehicle chassis in a paint-free location. Then check the live power wire and make sure it has a good connection. If that doesn't work, download the user manual from That should help you to decode why the amp is in protect mode.

Mar 05, 2011 | SPL FX21800 Car Amp

1 Answer


The red light indicates that your amplifier is in protect mode. Amps go into this mode if there is something wrong with the setup of the system to prevent fatal damage to the amplifier circuitry. This is bad thing since the amplifier will not function until the problem is solve and it can remove itself from protection mode.

Amplifiers can go into protect mode for many reasons but one of the most common is incorrect mounting. Is your amp sitting on the metal of your vehicle? Is it bolted down and screwed into the metal of the vehicle or your seat? The amp should never be touching any sort of metal. Only the ground should touching the metal of your vehicle.

Speaking of grounds, many people often neglect proper grounding which can cause an amp to go into protect mode. Do you have a solid ground? Is the wire less than 3 feet long and directly connected to a non-painted metal part of your vehicle? Is the ground wire the same gauge as your power wire?

These are just a few reasons why an amp can go into protect mode. You can find more information here. Or simply google for why your amp is in protect mode.

Aug 06, 2009 | MTX Thunder 81000D Car Audio Amplifier

1 Answer

Jbl am in protect mode

if it goes in protect mode means ur amp is turn up to high or it is over heating so it protectn it from fryn ur amp try to adjust it down

Jul 12, 2009 | JBL BP1200.1 Car Audio Amplifier

1 Answer

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

Apr 27, 2009 | SPL Audio Phantom DK2-1000 Car Amp

2 Answers

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

Aug 07, 2008 | AudioBahn DUB Mag Audio DUB2502 Car Audio...

1 Answer

My light on my amp is blinking at a steadty pace.

The amp appears to be in protect mode. 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

Aug 06, 2008 | Alpine MRV-T420 Car Audio Amplifier

3 Answers

Why does my amp stay in protect mode?

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

Aug 03, 2008 | DHD NTX-2139 Car Audio Amplifier

1 Answer

LIghtning Audio B300.4 Protect Light

protect mode should be reset if the negative of your amp is disconnected then reconnectewd. if it doesnt help, move your ground to a different location. if THIS doesnt help, consider a repair or a new amplifier.

Jul 10, 2008 | Car Amplifiers

1 Answer

Amp going into protect mode

If you set the gain too high on the AMP, at loud volume levels some clipping or distortion of the output signal will occur. Most amps have a Circuit inside that detects this clipping or distortion and applies protection to prevent damage to the speakers and the amp. It would help to know if you are driving the speakers with a Line level output or using the speaker output from your deck. There are many things that can cause an amp to go into protect mode, and knowing a little more about your setup will help to solve the problem.

Nov 07, 2007 | Alpine PDX-4.100 Car Audio Amplifier

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