If youĭon't find any shorted outputs, make sure there are no broken terminals You must replace all of the transistors in that group.īroken emitter resistors can cause an amp to go into protect. You have one defective transistor in a group of parallel transistors, You have several in parallel, it may seem as though the entire group shorted, but generally one fails and the others are OK. Therminals, they need to be removed from the circuit and checked. If you find one or more that read ~0 ohms between You shouldįind none that have anything close to zero ohms between any of the Resistance between the output transistors terminals. No power applied to the amp, grab a multimeter, set it to ohms, and measure the That's the most common cause for an amplifier to go into protection. Otherwise, it's likely that the output transistors failed. Solution: This can be caused by too low of an impedance from the way the speakers are wired, and sometimes a poor charging system (if the amp goes into protect when the volume is turned up). For space constraints, I'll leave it at that. Sometimes you can open the amp up and find physically fried components. It is never a bad idea to try hooking up the amplifier in a different car or taking it in to be tested just to be sure. The majority of the time, it's because mosfets are blown. Is the remote wire hooked up? Be sure it is, and that it is hooked up to the blue wire w/white stripe coming from the head unit, NOT the solid blue wire.Īfter that point, if the problem still exists, you're probably looking at bad parts in the PSU (power supply unit). This means that it is secured to bare metal that is clean, rust-free, and tight. Solution: Rule number one in amplifier hook up is to make sure the amplfier has a good ground. Your amplifier could have a completley different problem, though it is unlikely): Here are a few common problems and what can be done to troubleshoot, as well as fix them (my fixes are the most common. Sometimes the amp itself really is at fault. Many car amplifiers are incorrectly diagnosed and sent in for repair/returned because of incorrect hookup.
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