Amp wont power on, just keeps blinking?!
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Forum Name: General Discussion
Forum Discription: General Mobile Electronics Questions and Answers
URL: https://www.the12volt.com/installbay/forum_posts.asp?tid=41128
Printed Date: April 29, 2024 at 3:38 AM
Topic: Amp wont power on, just keeps blinking?!
Posted By: mach1chris
Subject: Amp wont power on, just keeps blinking?!
Date Posted: October 18, 2004 at 1:05 PM
Hey everyone,
I bought a used Clarion APX400.4 amplifier off a friend. I wired it up and when I try to power it up (turn on the stereo), the power LED just keeps blinking once every maybe 5 seconds and I hear a slight pop in the speakers. I tested the connections with a multimeter and they all appear fine. Any ideas what might be wrong and/or how I can fix it?
Thanks,
Chris
Replies:
Posted By: Charles_R_H
Date Posted: October 18, 2004 at 3:14 PM
what speakers and impedence do you have hooked up to the amp? How did you ground the amp?
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ELECTRONICS RUN OFF OF SMOKE, WHEN YOU LET THE SMOKE OUT THEY STOP WORKING
Posted By: drsnoze
Date Posted: October 19, 2004 at 2:40 PM
are you using the 4 channel amp to power the door speakers? did you run a wire directly from the speaker to the amp? or did you run speaker wire from the amp to the back of the head unit? If you ran them to the back of the head unit you possibly have a factory pre-amp. look in the passanger kick pannel to see if you have one, or consult the car manufacturer to see where it is located.
Posted By: mach1chris
Date Posted: October 19, 2004 at 2:48 PM
some background: the car is a stock 2004 ford mustang mach 1 with ford's premium audio system charles: its the stock factory speakers. The mids/lows (4 of them) are wired in parallel at 4 ohms per channel (2 channels). The highs (4 of them) are wired in parallel at 2 ohms per channel (2 channels). The amp is grounded to the body of the car in the rear behind the tail lights. I have another device successfully grounded at the same point. drsnoze: the 4 channel amp is powering all the speakers. For the lows, I tapped into the wiring harness that comes out of the back of the factory amps. For the highs, there are no preamps or amps for them, they ran right off the factory deck. What I did for these was get a wiring harness and i ran the speaker wire to the wiring harness. Any help is much appreciated. Thanks, Chris
Posted By: drsnoze
Date Posted: October 20, 2004 at 10:49 AM
did you run the remote turn on for the amp?
if not run a wire from any accesory wire(wire the turns on when the key is turn) on the wiring harness
Posted By: mach1chris
Date Posted: October 20, 2004 at 10:55 AM
yeah I did. Looks like something internally is f**ked up on the amp. I hooked it up in my other car to the existing wiring for a 2 channel amp and it did the same thing. I hooked pu the 2 channel amp in my car that the other wouldn't work in and it works fine. Now the questoin is I guess what is wrong with the amp :(
Posted By: forbidden
Date Posted: October 20, 2004 at 12:30 PM
How did you get the input signal for the amp? Disconnect all the speaker wires and see if the amp is still going in and out of protection.
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Top Secret, I can tell you but then my wife will kill me.
Posted By: mach1chris
Date Posted: October 20, 2004 at 12:54 PM
the input signal is coming through the rca's wihch are hooked up to a usb soundcard (this amp is powering an in-dash computer). I've tried disconnecting all the speaker wires and I get the same thing, in both cars
Posted By: forbidden
Date Posted: October 20, 2004 at 1:38 PM
Grab a discman or any other source and fire it into the amp. If the amp is still going in and out of protection it is either a really bad ground (doubtful by the sounds of it) but more than likely the magic amplifier smoke that makes it worked has escaped.
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Top Secret, I can tell you but then my wife will kill me.
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