Sony Amp blows fuses right away

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prelude25

Member - Posts: 3

Joined: March 17, 2003

Location: Canada

Posted: August 17, 2004 at 2:26 PM / IP Logged

Whenever the amp turns on the fuses blow right away. Wondering what the problem could be?

switch_hitter

Copper - Posts: 151

Joined: August 03, 2004

Location: United States

Posted: August 17, 2004 at 2:55 PM / IP Logged

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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prelude25

Member - Posts: 3

Joined: March 17, 2003

Location: Canada

Posted: August 17, 2004 at 3:08 PM / IP Logged

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?

cd2478

Copper - Posts: 57

Joined: March 23, 2004

Location: Australia

Posted: August 17, 2004 at 8:23 PM / IP Logged

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

Alpine Guy

Platinum - Posts: 2,478

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Joined: October 18, 2003

Location: Canada

Posted: August 17, 2004 at 8:28 PM / IP Logged

could also be sony keeping up with its excellent reputation for making crappy products.

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.

furflier

Copper - Posts: 236

Joined: June 14, 2004

Location: United States

Posted: August 17, 2004 at 8:29 PM / IP Logged

More than likely your power supply transistors are blown.

Jay T

Copper - Posts: 169

Joined: December 02, 2003

Location: Canada

Posted: August 17, 2004 at 8:43 PM / IP Logged

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

prelude25

Member - Posts: 3

Joined: March 17, 2003

Location: Canada

Posted: August 17, 2004 at 11:56 PM / IP Logged

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.

cd2478

Copper - Posts: 57

Joined: March 23, 2004

Location: Australia

Posted: August 18, 2004 at 1:55 AM / IP Logged

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!)

kgerry

Platinum - Posts: 3,455

This member consistently provides reliable information

Joined: February 07, 2004

Location: Saskatchewan, Canada

Posted: August 18, 2004 at 1:15 PM / IP Logged

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.....

Kevin Gerry

Certified Electronics Technician

MECP First Class Installer

Owner/Installer

Classic Car Audio

since 1979

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Sony Amp blows fuses right away

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