protection light on amps?
Printed From: the12volt.com
Forum Name: Car Audio
Forum Discription: Car Stereos, Amplifiers, Crossovers, Processors, Speakers, Subwoofers, etc.
URL: https://www.the12volt.com/installbay/forum_posts.asp?tid=20328
Printed Date: July 13, 2025 at 5:14 AM
Topic: protection light on amps?
Posted By: sparky break
Subject: protection light on amps?
Date Posted: October 20, 2003 at 3:41 AM
I have an earthquake of san francisco amp, model power 700xO, and it recently stopped working, the 'prottection' light coming on instead of the power light. Has anybody got any ideas on why this might be? Also im after some information on the amp, ie pwer outputs, owners manuals, anything really, i have been unable to find anything on the net so far. ------------- ***continuous exposure to sound pressure levels over 100db may cause permanent hearing loss. high powered
autosound systems may produce sound pressure levels well over 130db. use common sense and pr
Replies:
Posted By: fuseblower
Date Posted: October 20, 2003 at 6:50 AM
Disconnect the speaker wires from the amp terminal, you could have a blown speaker or a short somewhere in the speaker wiring.
Posted By: Ketel22
Date Posted: October 20, 2003 at 11:08 AM
protection lights are almost always something with the load on the amp from the sub, wiring, blown sub, or just a lower impedence than the amp can handle.
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Posted By: sparky break
Date Posted: October 20, 2003 at 3:03 PM
Nah, its nothing to do with the load, as the protection light comes on even when there is nothing hooked up to the amp. And its not my wiring, because we tested it in a mates car off hios wiring and it was the same.
Posted By: wvsquirrel
Date Posted: October 21, 2003 at 4:12 AM
When you say "we tested it in a mates car off hios wiring and it was the same", do you mean you moved your amp into his car and tested it with his sub, you moved your sub into his car and tested it with his amp, or you hooked up his sub to his amp the same way you did yours?
Need to be a little more specific, and never assume. Always check and recheck. Disconnect everything from the amp and let it sit for a while (like 30 minutes or an hour), then hook everything but the sub back up. Does the protect light still come on? Check your voltage going to the amp, make sure it's at least 12v. Check your grounds (clean, bare metal, less then 3 feet from the amp, and attached directly to the vehicle's chasis). ------------- Squirrel
"No more Cpt. Kirk chit chat"
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Posted By: sparky break
Date Posted: October 22, 2003 at 1:32 AM
yeah, we took out my amp from from my car and put in my friends car and tried it off his wiring. I also have a fusion amp which works fine in both cars. Im having it looked at now , but yeah it has a good ground and voltage seems to be okay. I hope its not a blown transistor, but i wouldnt have thought that this would cause the protection circuit to activate. Ill keep you posted on how it goes.
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***continuous exposure to sound pressure levels over 100db may cause permanent hearing loss. high powered
autosound systems may produce sound pressure levels well over 130db. use common sense and pr
Posted By: superstreet786
Date Posted: October 23, 2003 at 6:08 PM
check all connections... a bad connection will do it and your power supply may be fried but its unlikely
Posted By: sparky break
Date Posted: October 24, 2003 at 12:43 AM
Is a power supply more or less to fix than a blown transistor? I assume it would about the same.
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