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As an Amazon Associate, we earn from qualifying purchases made on our website. It’s so strange, your amp goes into protect mode when the volume is turned up. Nothing can be frustrating like when you have your well-functioning amp, then on turning up the volume, it goes into protect mode. Before we dive into details, here are some quick solutions to the problem: Your amplifier may go into protect module due to loose wiring or incorrect speaker wiring causing a low speaker load impedance resulting in power overload and overheating. Other causes may be issues with the charging system, blown fuses, or failed output transistors. In the same breath, there are some quick solutions to this issue. This includes checking the onboard fuses and transistors, fix internal wiring as well as any overvoltage or overheating issues. What Happens When An Amplifier Goes Into Protect Mode?Arming yourself with information about how Amp functions can prevent you from scratching your hair out when not sure what could be wrong. With electronic gadgets, anything could go wrong when you least expect it. In fact, you should be happy your amp has a protect mode, because some amps will simply blow your fuse and stop working instead of going into protect mode. You can check out our guide on why does my amp keeps blowing fuses to learn more.
Therefore, it is important to stay prepared when such a moment, comes up. There are other variations of the issue as well:
There are many things that can lead to an Amp going into protect mode. Getting acquainted with your Amp can lessen the trouble every time it goes into protect mode. It will certainly protect you from running for an Amp technician. It’s only a few tweaks that can save you time and money. Let’s demystify the problem behind Amp protection mode. What is Amplifier Protect Mode?Essentially, Amp is designed to increase the amplitude of electrical signals, mainly sound reproduction. So, in the first place what could lead an Amp to go into protect mode? Essentially, the amp-protect mode is a shutdown state that modern amplifiers go into in different circumstances. This shutdown state prevents serious damage to the amp or any of the components in the system. This same issue can occur on some receivers as well. For example, we recently wrote an article explaining how to fix a sony receiver protector error. It might be annoying if your amp keeps on going to this mode, but it might be saving you from a bigger headache or costly replacement costs in the future. Every time your Amp experiences a shutdown, just know it is designed to do so to prevent serious damage from happening or components in the Amp system. However this can cause issues in your sound system, for example, your speakers and subwoofers will not work even though the amp has power. You may be annoyed by the idea of protection mode, but it can save you lots of more trouble in the future. However, some of the common problems that could prompt your Amp going into protect mode are:
But for this post, we are focusing on your Amp going into protect mode when the volume is turned up. However, this article focuses on your car amplifier going into the protection mode when you turn up the volume button. Here’s how you can fix the issue if it occurs. Solutions For Amp Going Into Protect ModeSolution 1: Check On-board FusesThe first thing you do is check the onboard fuses – if it has them – to ensure they are correctly plugged into the amplifier. Not all amplifiers will illuminate the protection LED when the fuses are blown, so you need to check to ensure they are functional. If the fuse holders have melted, have the amp checked by a technician to determine the reason they melted and if the fuse holder is usable. Generally when the fuse holder melts the contact is badly oxidised, and the clips lose their tempering, which means they can longer function properly and will continue to overheat. However, just because a fuse doesn’t look blown, doesn’t mean it’s intact. If you doubt its functionality, pull it from the holder and measure the resistant across it – set meter to ohms. The resistance in a normal fuse rated more than several amps will typically read 0 ohms, though most meters can’t reach that low. You can try holding the leads together for about five seconds to know how low the meter amplifier you’re using can go. Solution 2: Fix Incorrect WiringIf the speakers are wrongly wired, which in most cases happens to car owners, this can definitely lead to protect mode. Also, having a poor charging system can be the main culprit giving you a headache. However, that cannot be ruled outright. You can as well check the health of output transistors because when they fail, the Amp automatically goes into protect mode.
If the Amp functions normally when the volume is dropped, the Amp is experiencing too low an ohmage as a result of mistake with the wiring. What happens in such a scenario? If the subs are badly wired, expect them to draw too much current until the protection circuit is forced to intervene in order to prevent any damage from happening. The normal range ohmage should operate is 2 ohms, but in case you are running it at 1 ohm, definitely, this problem is bound to be experienced. To figure out about that, have the Amp not to be applied with any power, take the Multimeter, make sure its set to ohms, and measure the resistance that is in the middle of the output transistors terminals.
Now, both the terminals should not have anything near to zero ohms and in case you do find one or two, they should be removed immediately from the circuit for a checkup. Alternatively, an open emitter resistor or a broken one can be the cause for an Amp to go into a protect mode. When you entirely fail to identify the shorted outputs, have a keen eye on the emitter resistors to make sure no broken terminals are there. Incorrect wiring is an issue that affects most car owners, especially those who regularly disconnect their amplifiers. That can make your amp to go into protection mode. A poor power system can also be the main cause of the issue in your stereo system. As such, you can’t rule this out immediately. You need to check your transistors as the amp will automatically go into protect mode if they are faulty. However, if the amplifier works as normal when you drop the volume, then it’s experiencing a low ohmage issue that may result from improper wiring. Solution 3: Fix Overvolatge – Too Much VoltageThe more your Amp volume is turned up, the more voltage it requires for it to maintain the amplitude levels. For instance, if you have put on volume 30 and at that level, the Amplifier is working fine with no problem, when you turn to volume 40, the amp goes into protect mode and returning it back to 30 everything works again fine.
You may see when it is operating on volume 30, the voltage at that stage is 12v or beyond, however, when you increase, rather than voltage going up, it drops causing protection mode. You know, the Amp is designed to have a minimum of 10.8 volts for it to function normally, but when the voltage drops below that, to protect itself, it goes to protect mode. Since it is a power issue, check your battery or the alternator to why they could be changing the voltage on volume increase to see if their voltage is constant. Solution 4: Check For Overheating IssuesSometimes when the volume is turned up, the amp may generate a lot of heat in the process. For you to control this kind of heat, you just need to give the amp enough airflow. If the amp immediately goes into protection mode when turned on, then the overheating is unlikely the cause since the amp would not have heated up as yet. Wherever you have your amp mounted, make sure there is enough airflow all the time to keep it cool consistently. This may stop sudden cut-offs. In addition, your amp will start overheating if there’s a mismatch in the speaker’s impedance and its working range. Shortened speaker cables can also make it overheat. However, it’s wise to start by checking easy points of failure such as fuses though most amps don’t usually go on protect mode due to a blown fuse. Nonetheless, it worth checking as it’s easy and can save you a significant amount of time. Solution 5:Short SupplySometimes the amplifier is thrown into protect mode because of driver transistors or shorted output. This could be due to:
When identifying the failure, first you should know there are two types of shorts
Hard short – When measured using a multi-meter and no power applied, it shows low resistance in between the supply rails. They normally identify blown transistors, punctured mica-washers or solder bridges. Nevertheless, hard short is not common with new Amps
Soft short – To identify this one you measure resistance in between the supply rails to each other, earth and the output do not show low resistance (that is less than 650 ohms or so). You may get resistance that is higher in the other direction or the same. Make sure you change the meter leads as you test to measure both polarities. Soft short indicate something is installed incorrectly. Solution 6: Output Stuck to SupplyIn case the output sticks to one supply or the other, here is the cause below:
If the driver transistor or one output is shorted, it leads to a soft short, while open circuit transistor perhaps in combination with its opposite being shorted cause rail sticking. Having a stuck rail can be as a result of the following faults near the input:
The tricky part is identifying the fault that is why before you troubleshoot, you invest in the best tools to capture the problems effortlessly.
Some of the most effective troubleshooting tools you can use, in case doing the work by yourself are:
How to Troubleshoot Your Amplifier In Protect ModeOver 70% of cases of Amp malfunction are not caused by a device error or manufacturer error, but improper following of instruction when doing the connection. Troubleshooting your amplifier fully for a problem like this may be a bit tricky for someone who is relatively green in car audio systems. That means it may be worth asking for a friends help if he has more experience with anything that goes beyond installing the components.
Secondly, first-timers who are less knowledgeable about the Amp operation, once they spot a problem, they rush to call Amp technician to fix the problem. However, even those technicians make mistakes by diagnosing wrong issues and that starts another cycle of problems. Therefore, it is paramount that you study the step by step process to understand:
So, learning about simple steps you can use to diagnose your Amp is helpful to save you more trouble in the future. When the Amp goes into protect mode when the volume is increased, before making your conclusion and running after the fault blindly, exhaust first all the possible problems. Determine what is the exact nature of the problem as once you do that; you will end up with a clear procedure on how to handle the fault. Wrongly diagnosed problem may multiply another fault that was not there in the first place. Here’s how you can troubleshoot the protect mode when the volume is turned up issue: 1. If The Amp Malfunctioned After Turning It On The First Time:
2. If The Amp Malfunctioned After Listening Through An Exceptionally Long Session:
3. If It Malfunctioned When Driving On A Rough Road;
How To Disconnect and Test Your Amp1. Disconnect And Test The AmpIn simple terms, troubleshooting an amplifier in protect mode starts by bringing it back to basics. Essentially, you will need to disconnect the amplifier from the speakers and head unit to check if the problem is still there:
2. Reconnect and Test Your AmpIf your amplifier doesn’t get out of the protected mode even after disconnecting everything, that shows you don’t have power or ground issues. That means your amplifier might be defective. Nonetheless, the problem might lie in other components if the amp doesn’t go into protect mode when you add the volume with the speakers and signal wires connected.
How To Stop Amp From Going Into Protection Mode?So how do I stop amp from going into protection mode? You can prevent your amp form from going into protect mode by preventing the amp from overheating. This means you should always check for and prevent the issues that can cause your amp to overheat. This includes a lack of airflow, electrical shorts, wiring problems and so on. Why Does My Amp Go Into Protect Mode When RCA Is Plugged In?This is a common problem, the amp works fine without RCA cables plugged in. However, once you plug an RCA cable into the amp, it goes into protect mode. This is likely because your RCA cables are bad. Get a cheap meter and check your RCA cables to see if they are good. If you don’t have a meter, you can also plug an iPod, smartphone, etc into the amp directly with a 3.5mm to RCA adapter. If it works OK, then it’s your RCA cables or your head unit is bad. If it doesn’t work, then your amp or sub is bad. Why Is My Kicker Amp in Protection ModeProtection mode prevents permanent damage and failure. There are 4 possible causes for your Kicker amp to go into protection mode. Kicker calls it “SORT” which stands for Short, Overvoltage, Reverse polarity, and Thermal. Here is a description of each:
Another possible cause of the problem is internal hardware problems. If the contacts that your Kicker amplifier fuse clips to get hot or has malfunctioned, you are right to suspect an internal problem with the amp. How To Fix Kicker Amp Protection ModeTo troubleshoot and fix your Kicker amp protection mode issue, follow the procedure below:
If all the above tests pass, then there is likely an internal short in the amp or some other issue with an electronic component like a transistor (e.g a MOSFET). This willl require a technician to troubleshoot and repair the amp. ConclusionAn amp is a simple device, but sometimes they can be very complicated, such that even pro technician find it intimidating a times to deal with. In the event that you have tried all the manner of things and no leading fault, you can identify, look for an experienced technician to diagnose the problem or consider buying a new Amp altogether.
If you have never had prior experience with an Amp and it happens to go the protective mode way, never try to troubleshoot it. Call experts, however, if not your first time, learn troubleshooting steps to guide you when that unexpected moment comes. Last but not least, make good use of the manual. So there you have it, solutions when your amp goes into protect mode when volume is turned up. These solutions should also work for issues such as when your amp goes into protect mode when turned on or when your amp goes into protect mode when car starts. If for whatever reason you’ve given up on your amp and decide not to fix it, there are also ways to make your speaker louder without an amplifier. Also, if you already have another working amplifier, you can also connect multiple speakers to that single amplifier. Good luck! |