I've read the other posts and i'm not sure they are answering my questions about the protect light.
i wired my amp, it played fine for about two hours. then it stopped. i think that was due to over heating. now, when i turned it back on the next day it will play only at low power output from my radio...if i turn the radio up past 27 (0-62) the protect light turns on and the power light turns off...this happens for about 5-10 seconds then it flickers to the power light and flips right back to protect light... ultimately leading to no bass. what did i do wrong, what should i check first/last?
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Try posting your question in a more appropriate area of FixYa. From what I can tell, you're asking about a porch light timer of some type. You've posted twice in the "Cars & Trucks" area and three times in the "Digital Cameras" area. Your questions are seen by experts in those areas, none of whom may know anything about porch light timers.
might have roasted your speakers voice coils a little which may be sending the amp into protect mode throw a speaker on it that you know works and if it doesnt trigger the protect circuit then you probably have a blown or almost sub.
If the amp stays in protect mode all of the time, I would suspect a short in the speaker wiring or speaker(s) voice coil(s), or perhaps a faulty ground. If it plays for a short period of time and then goes into protect mode, it is most likely overheating. First check all of the wiring. Test your speakers on a known good amp and make sure there are no places in your wiring where the insulation may have been damaged, causing an intermittent problem.
Many owners have reported that this particular amp has a tendency to overheat. Also, when run in bridged mode, the speaker impedance needs to be at least 4 ohms. It will overheat if the impedance is below 4 ohms.
If it is not turning on your problem is it is not getting power. Check your fuses. The reason an amp goes into protect mode is usually because the subs are not wired up right. Make sure your fuses are good, you have a good ground, and make sure your amp turn on wire didn't come loose when you were putting the deck back in. As for the amp going into protect you probably wired the subs down to too few ohms and the amp you have can't handle it. Try hooking the subs up straight w/o bridgeing them and turn it up to see if it works. If you don't have problems with it then you wired your subs wrong.
It's most likely that the over-current protection is tripping at high power. At lower voltage, the amplifier can't produce as much output power and therefore can't produce enough current to trip the protection circuit.
You need to check your speakers to make sure that they are not shorted. With an ohm meter, the resistance across the voice coil shouldn't read any less than ~90% of the rated impedance.
If the speakers and the wiring are OK, the amp may have an internal fault causing the amp to go into protection.
If the amp goes into protect with the wires unplugged from the board, the amp likely has more serious problems. It may have a shorted power transformer and almost certainly has shorted output transistors. If you think you may want to try to repair it yourself, read through the following page (particularly the information in the yellow box). Respond to this post if you have more questions.