amp powering on but not working
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=112035
Printed Date: June 15, 2024 at 9:18 PM
Topic: amp powering on but not working
Posted By: ccityroadshop
Subject: amp powering on but not working
Date Posted: March 01, 2009 at 11:16 PM
hey guys, i have a older memphis amp that is powering on fine, the protection light is not coming on it seems like its fine but its just not working the subs are fine, the rca's are fine the speaker wires fine, any ideas as to whats wrong with it? if so how can i fix it, would really like to use it on my new hcca its a nice memphis bell
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mustang GT convertible with lots of performance mods... Alpine M500 amp with sealed enclosure, 10 inch kappa perfect, clarion cz500 head unit, kicker ks speakers all around
Replies:
Posted By: stevdart
Date Posted: March 01, 2009 at 11:58 PM
...and you know for sure that the amp worked before you hooked it up?
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Build the box so that it performs well in the worst case scenario and, in return, it will reward you at all times.
Posted By: i am an idiot
Date Posted: March 02, 2009 at 5:48 AM
I have worked on MANY Memphis amps the had a broken leg on the LEDs. It may be in protect. Are there 3 LEDs on that amp? Which color is lit up?
Posted By: ccityroadshop
Date Posted: March 02, 2009 at 10:34 PM
no i dont know for sure that the amp worked before, i got it off a friend who had it just sittin in his garage, and no i only has 2 leds but the protect lights not on its a blue led
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mustang GT convertible with lots of performance mods... Alpine M500 amp with sealed enclosure, 10 inch kappa perfect, clarion cz500 head unit, kicker ks speakers all around
Posted By: soundnsecurity
Date Posted: March 02, 2009 at 10:43 PM
if it is out of warranty, i would open it and check for corrosion.
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Posted By: ccityroadshop
Date Posted: March 03, 2009 at 9:36 AM
yea it is out of warranty thats what i was planning to do open it and check it out just wondering if any1 could give me places to check, maybe something needs soldered or could a capacitor need replaced in it?
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mustang GT convertible with lots of performance mods... Alpine M500 amp with sealed enclosure, 10 inch kappa perfect, clarion cz500 head unit, kicker ks speakers all around
Posted By: ccityroadshop
Date Posted: March 03, 2009 at 11:57 PM
ok sry it does have the 3 lights im looking at it now green red and yellow, the green power light comes on like its supposed to, i opened the amp up and could not see anything wrong, but i am by no means an expert on it
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mustang GT convertible with lots of performance mods... Alpine M500 amp with sealed enclosure, 10 inch kappa perfect, clarion cz500 head unit, kicker ks speakers all around
Posted By: i am an idiot
Date Posted: March 04, 2009 at 12:25 AM
Which amp is it? This one? or Maybe this one? Or is it possibly newer than either of those?
Posted By: ccityroadshop
Date Posted: March 04, 2009 at 11:49 PM
st1000d built just like that 2nd one
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mustang GT convertible with lots of performance mods... Alpine M500 amp with sealed enclosure, 10 inch kappa perfect, clarion cz500 head unit, kicker ks speakers all around
Posted By: i am an idiot
Date Posted: March 05, 2009 at 12:45 AM
There appears to be 2 separate power supplies in that amp, did you remove and inspect each fuse? It may light up with only one power supply functioning but may require both to actually work.
Posted By: ccityroadshop
Date Posted: March 05, 2009 at 10:37 AM
hmmm well both fuses are fine, i also just noticed that the gain control knob on the amp is free spinning it wont stop turning if i go up or down both ways, so that may have something to do with it right, ive got the amp opened up can i take that piece off that the gain knob is slid into and replace it?
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mustang GT convertible with lots of performance mods... Alpine M500 amp with sealed enclosure, 10 inch kappa perfect, clarion cz500 head unit, kicker ks speakers all around
Posted By: i am an idiot
Date Posted: March 05, 2009 at 7:28 PM
Yes there is a good chance that is a problem. Is this a 5 or 6 channel amp? If so the gain control should only affect 2 of the channels. There should be some numbers and a letter printed on the side or back of the potentiometer. What are they? Edit: You initially said it was a Memphis Belle, those are 5 or 6 channel amplifiers. The model number you posted is for a 1 channel amp. There is a very good chance that the gain pot is your only problem. Memphis will not sell any parts to even an authorized dealer. If you can give me the numbers off the side of the pot I can at least tell you the value and the taper of the OEM part.
Posted By: ccityroadshop
Date Posted: March 08, 2009 at 11:34 PM
yeah that was my bad its not a belle just a mono block
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mustang GT convertible with lots of performance mods... Alpine M500 amp with sealed enclosure, 10 inch kappa perfect, clarion cz500 head unit, kicker ks speakers all around
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