Why Does My AMP Goes Into Protect Mode When Volume is Turned Up? [Solved]

If your amp goes into protect mode when volume is turned up, then you’re at the right place. Whenever you wish to crank up the volume a bit more to get the party going or set the tone for the night, your amp gives up on you. And trust us, we know how terrible it can feel.

A few of the main reasons your amp might be going into protection mode are low speaker load impedance caused by incorrect speaker wiring, problems with the charging systems, failed output transistors, or damaged fuses.

As distressing as the reasons may sound, they really are not! These issues can be fixed by your local mechanic or even you. All you have to do is keep reading to learn more about the causes in detail and follow our list of solutions for a simple and easy journey.

What is protection mode? And, why does it go into it?

Amplifier protection mode essentially exists as a shutdown state that your car amp can go into under various circumstances. The shutdown exists to prevent severe damage from occurring to the amp and other components of the system. 

While this seemingly annoying issue of protection mode might frustrate you, it actually helps your amp and you in ways more than you can imagine.

It saves you from spending hundreds of dollars on fixing serious issues and prevents it from ever getting to that point in the future.

4 Reasons Why AMP Goes Into Protect Mode When Volume is Turned Up:

AMP Goes Into Protect Mode When Volume is Turned Up

#1 – Overheated by extensive use

If you feel that your amp could have gone into protect mode after prolonged use in a high volume, there is a very good possibility that your amp went into protection mode due to overheating.

The amp tends to generate a lot of heat whenever it functions at its maximum capacity in volume and duration. Besides this particular reason, your amp could overheat due to a mismatch in the speaker’s impedance and working range.

Solution: You need to ensure that your amp gets adequate airflow wherever it is mounted. You can purchase a small portable fan to create a consistent airflow and prevent your amp from overheating. 

Please keep in mind that this is a temporary solution, and if the amp stops going into protection mode after using a fan, it might be a sign for you to relocate the amp.

#2 – Incorrect Wiring

Your amp could be going into protection mode due to incorrect wiring. Whenever something goes slightly wrong with the amp’s wiring, the protection circuit will trip, which will lead to the entire amp shutting down to keep the problem from getting worse. 

If the amp seems to be functioning normally when the volume is lowered, the amp might be experiencing low ohmage due to incorrect wiring.

You could have used the improper size gauge, or the wire to the chassis ground could be shorted. Using wires that are too thin also might contribute to this problem as they are not the most effective option.

#3 – Blown On-Board Fuses

You should check your onboard fuses – if your amp has them -to figure out whether they are correctly plugged into the amp onboard fuse.

Not every amp will illuminate or have a protection mode LED light, indicating when the fuses are blown; hence, you need to check to ensure they’re plugged in right.

Note: If upon inspection, you find that the fuse holders have been damaged or melted away, you should have your amp checked out by your local mechanic to figure out what caused the fuse to melt and if you can use it again.

Usually, when a fuse holder melts, the contact is highly oxidized, leading the clips to lose their tempering. You should keep in mind that if a fuse doesn’t look blown, it doesn’t imply that it’s intact.

Solution: To check the functionality of the fuse, you should check its resistance from the holder. Set your multimeter to ohms, and in case you do not own one, you can find one here.

If the reading is above 0 ohms, you should call your local mechanic to figure out if you need new fuses or can re-use the current ones.

#4 – Overvoltage

The higher the volume on your amp, the higher the voltage it requires to maintain certain amplitude levels.

For example, if you are using your speaker system at volume 25-30, and the amp seems to be working alright, but when you turn it higher beyond 40, and the amp goes into protect mode, this could indicate that you have power issues within the batteries.

The voltage may be at 12v or above, but when you increase the volume, the voltage may drop instead of increasing and subsequently going into protection mode.

Almost all amps are customized to have a minimum voltage of 10.8v to function smoothly, but when it drops below that, the amp goes into protection mode to prevent damage from occurring.

Solution: Since this is an issue with the batteries, you would need to get your batteries, as well as the alternator, checked out by your local mechanic to figure out why there is a voltage drop whenever the volume is increased.


The protection mode exists for a good reason and prevents any severe damage from occurring to your amp and speaker system, but sometimes the protection mode is activated in situations that are not so severe. A few of the common reasons for protection mode activation are overheating, improper wiring, blown fuses, and overvoltage but don’t worry! 

You can resolve all the above-listed issues by yourself if you have adequate knowledge of how the amp works, but it would be advised to acquire the assistance of a mechanic to ensure you have a set of expert hands with you!. Still, sometimes

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