Power issues may be related to a loose or burnt wire, but a blown amp fuse is also possible. Amps typically include built-in fuses in addition to in-line fuses , so check both of these.
If you notice that the contacts your amp fuse clips into have gotten hot, or melted, it's likely that the fuse won't make good electrical contact, and it may overheat and blow again. In this case, there may be an internal problem with the amp. An overheating amp can also be the result of a mismatch between speaker impedance and the range the amp is designed to work with, or speakers or wires that are shorted out.
Before you dig in any further, check a few easy points of failure like fuses. Although amps usually don't go into protect mode due to a blown onboard fuse, it's easy to check and might save you from a headache down the line.
Troubleshooting an amp in protect mode—beyond asking the questions listed above—starts off by breaking it down to basics. You'll typically disconnect the amp from the head unit and the speakers to see if the problem still exists. If the amp remains in protect mode at that point, there may be a power or ground problem, or a problem with the installation where the body of the amp makes contact with bare metal.
Since metal components of a vehicle's frame, body, and unibody act as a ground, allowing an amplifier to touch bare metal can cause all sorts of problems. If your amplifier remains in protect mode with everything disconnected, and you're sure that there aren't any power or ground issues, the amp might be defective.
However, the problem lies elsewhere if the amp is no longer in protect mode at that point, and you can look for the issue by connecting the speaker wires and patch cables one by one. If you connect a component back up, and the amp goes into protect mode, the problem has to do with that component or related wiring or cables.
For instance, a speaker with a shorted-out or damaged coil can cause problems. In the event that everything has power, nothing is shorted out, and the amp isn't overheating, then the amp may have some type of internal fault. That typically means professional repairs or replacing the amp. To get the best sound from your car amplifier , adjust your gain component setting so that it's under the maximum level that meets distortion.
Other suggestions include changing the frequency to your unit's specified frequency numbers, tuning your car's amplifier by ear, or using tuning equipment to test each component's sound quality. To choose the right amp for your car or truck , find your car speakers' RMS root mean square value and select an amp that puts out 75 to percent of that number.
If you're adding a subwoofer to the system, you can get a single-channel amp; otherwise, you'll need one channel for each speaker. 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. The 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.
If you doubt its functionality, pull it from the holder and measure the resistant across it — set meter to ohms. If 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. Learn more. Yes, protection mode is a built-in feature of the amp, and yes, whatever caused it can almost always be fixed. Almost all amps and all amps you should be buying are engineered with protection circuits. If you lost it or threw it away, you can almost always find it in PDF form by searching the model number.
Just check what sequence the light is blinking in, look in the manual to see what it means, then skip ahead to where we talk about solutions. Sometimes the protect light turns on for two seconds when the amp does, like a check engine light, and then shuts off. Some protect lights are green or blue instead of the usual red. These amps indicate protect mode by blinking the power light before shutting down completely.
Even so, following these six steps will get you through 90 percent of cases. Put it somewhere in your car where it will get more airflow. If overheating is the problem, attaching a fan to your amp might also extend its life. Look for clean, secure connections at every port. If you notice any dirt, clean it carefully with a dry cloth. This is also a good time to make sure that the amp is not directly touching the metal of the car at any point.
Low voltage can be caused by bad grounding. In some cases, the connections between the wire and the fuse holder will be a problem. You will also see defective fuse holders. Clues to a Bad Connection: Generally, when there is a bad connection and the connection has been bad for an extended period of time, the insulating material around the connector will be melted. The image below shows a terminal block that melted because the set screw wasn't tight enough on the wire this is very common.
In this particular amp, the damage was so bad that the block melted the solder and pulled out of the board. Fuses - Open But Not 'Blown': Also, just because a fuse doesn't look blown, that doesn't mean it's intact. If there's a question, pull the fuse from the holder and measure the resistance across it set meter to ohms.
The resistance across fuses rated more than a few amps will be essentially 0 ohms. Most meters will not read to 0 ohms. To know how low your meter reads at 0 ohms, touch the leads together for 5 seconds. This is what you should read when you touch the meter across the fuse out of the fuse holder. The powers that be have deemed that the Flash content on web pages is too risky to be used by the general internet user and soon, ALL of the support for it will be eliminated most Flash access was eliminated This means that no modern browser will display any of these demos, by default.
The fix for now is to download the Ruffle extension for your browser. Ruffle Web Site. An alternative to Ruffle is another browser, Maxthon 4. At every point where there is a green indicator, you should check the voltage. Using the demo should help you to better understand where you'd lose voltage when there is a break in the circuit. Step 3 If the voltage remains near or above 12v but the amp still goes into protect mode, disconnect all speaker wires from the speaker terminals of the amp and disconnect signal cables from the amp.
It's important that you disconnect the speaker wires from the speaker terminals of the amplifier and disconnect all RCA cables from the RCA jacks of the amplifier. If the amp powers up after disconnecting the speaker and signal cables from it, try reconnecting the RCA cables. If the amp goes into protect with the RCA cables plugged in, go to step 4.
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