my amp was the same way. An amp that’s too hot to touch with your bare skin is a sign of two of the most common causes of protect faults: lack of airflow, and load mismatch. 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. Manuals contain a tsunami of information, so if you’re overwhelmed, here are the things to look for: If the last part is true, you’re on easy street. Pro installer checked setup and says it's all good, though. I have the same amp in my girlfriends car but hooked to two 12" kicker comps and they hit really hard and I've had no trouble with the amp. I just installed a jlaudio jx 500/1 and 10" tw3 in my 98 volvo v70. To verify that the speaker is the problem, get your multimeter again, and test its ports this time. Knowing what happened before it quit working can help determine how to fix it. To verify that this is your problem, touch the black end of your multimeter to some inert metal on your car, then the red end to your amp’s ground terminal. Here's a brief troubleshooting method that will hopefully help you if your amplifiers ever go into protection. If it starts right up as normal, the problem is in the speaker — your amp has just shut down to protect itself. I'm confused : SOLVED - thank you guys! When something goes wrong in the amp’s wiring, the protection circuit trips, shutting down the entire amp to keep the problem from getting worse. Put it somewhere in your car where it will get more airflow. Like in the last step, you can test this using the multimeter — and again, you’re looking for 12V with the car on, 11V if it’s off. If your amp has a “protect” light, and it’s on, then chances are good that you have a faulty speaker, subwoofer, cable or another component. Amps go into protect mode for many reasons. If you lost it or threw it away, you can almost always find it in PDF form by searching the model number. If overheating is the problem, attaching a fan to your amp might also extend its life. Many have flat repair rates that are very affordable and cover parts and labor as well as return shipping. Take it to a well-regarded sound technician. Make sure none of the connections have rattled loose from driving on bumpy roads, and check that they’re all free of dust, debris, and oxidation. If you still have a problem in this state then either your amp is defective or you may have an installation problem such as the amplifier touching metal. This page is a VERY basic introduction into car audio amplifier repair. Watch as Allyn goes through some troubleshooting processes that you can try when your amplifier isn't functioning properly. You’ll need a multimeter for this. You may also be interested in How to Install Your Own Car Stereo System . Remove all of the speaker wiring and RCA wiring and leave only the power, ground and remote leads connected. im only asking cause i have sean some people that have run speaker wire as there ground. If the amp is OK in this torn down state start reconnecting wires until you find what causes the problem. Use the red probe on the multimeter to check the voltage on each of the amp’s ports. If you can’t turn your amp’s power light on even by pressing the button, you might be in protect mode. DecibelCar is reader-supported. Add the RCA cables first. If your amp has a “protect” light, and it’s on, then chances are good that you have a faulty speaker, subwoofer, cable or another component. I tested everything and it was working good so I thought I'd start the car and go for a drive. To verify that the speaker is the problem, get your multimeter again, and test its … everthing was fine until i connected the rca's so i say find a better ground. Always mount the amplifier to a non-conductive surface. An audiophile and automotive gear head, James loves to write about the latest equipment and technology of both industries. A good sign of this is if the voltage on every terminal in your battery is low. We don’t recommend taking your amp apart unless you’re certain you can put it back together. Did it happen after blasting for hours (may be thermal overload and it needs to cool)? Remove any connection to the speaker, then turn your amp on and see if it’s still in power protection mode. Amplifier Protection Mode Troubleshooting Try to determine the cause. Low voltage can be caused by bad grounding. If you believe your amplifier is defective contact the manufacturer first. Car Amplifiers Forum > Archive through May 29, 2006 Forum > AMP shuts off when i raise the volume PLEASE HELP . Bronze Member. Joseph O. When you buy via links on our site, we may earn an affiliate commission at no cost to you. 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