Sony Amp blows fuses right away
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=37598
Printed Date: May 18, 2024 at 5:39 AM
Topic: Sony Amp blows fuses right away
Posted By: prelude25
Subject: Sony Amp blows fuses right away
Date Posted: August 17, 2004 at 2:26 PM
Whenever the amp turns on the fuses blow right away. Wondering what the problem could be?
Replies:
Posted By: switch_hitter
Date Posted: August 17, 2004 at 2:55 PM
from my experience(which is probably half as much as some of you guys) everytime i have delt with an amp thats fuse blows right away the amp was blown due to the impedance being to low for the amp...ie wiring your speakers down to a 1 ohm load, and putting them on an amp thats only 2 ohm stable stereo.
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2 Memphis HPO 12s
1 Memphis 1000D
2 Memphis 8s
1 Memphis MC200
4 Memphis 3way 6 1/2s
1 Memphis MC3004
4 Memphis Tweeters
1 Memphis 3-way electronic crossover
2 Memphis 5 1/4
2 Memphis 4s
Posted By: prelude25
Date Posted: August 17, 2004 at 3:08 PM
I know that the subs that i hooked up are only a 2ohm load and the amp is two ohm stable. So what else could be the problem?
Posted By: cd2478
Date Posted: August 17, 2004 at 8:23 PM
a bad earth (is the metal clean under the earth, no paint, no dust no nothing except for metal???) the power cable might be touching metal somewhere due to a sharp metal edge cutting through the insulation
Posted By: Alpine Guy
Date Posted: August 17, 2004 at 8:28 PM
could also be sony keeping up with its excellent reputation for making crappy products.
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2003 Chevy Avalanche,Eclipse CD7000,Morel Elate 5,Adire Extremis,Alpine PDX-4.150, 15" TC-3000, 2 Alpine PDX-1.1000, 470Amp HO Alt.
Posted By: furflier
Date Posted: August 17, 2004 at 8:29 PM
More than likely your power supply transistors are blown.
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Posted By: Jay T
Date Posted: August 17, 2004 at 8:43 PM
Do what cd2478 said and double check your power wire for breaks to see if its contacting metal anywere. And make sure your ground is making good contact on a sanded to bare metal surface. Then throw out the sony amp
Posted By: prelude25
Date Posted: August 17, 2004 at 11:56 PM
The thing is that we didn't change any of the power or ground connection and everything was working fine before we hooked up the other two subs. I guess the power supply transitors are toast. So i guess sony make crappy amps.
Posted By: cd2478
Date Posted: August 18, 2004 at 1:55 AM
yes, yes they do! but check your wiring anyway, a fray in the insulation causing the power cable to earth itself can happen anytime, anywhere if it wasnt properly installed (aka rubber grommets used when passing wires thru holes etc!)
Posted By: kgerry
Date Posted: August 18, 2004 at 1:15 PM
it sounds to me like you've blown the output drivers ( 1 or many )...if it only blows when you remote it on that pretty much excludes it being a problem in the power supply....hate to say it but it may be time to have it serviced.....
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Kevin Gerry
Certified Electronics Technician
MECP First Class Installer
Owner/Installer
Classic Car Audio
since 1979
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