Amp stopped working while driving...

[gangstajpimpin 10+ year member]

Ok, as the title says my Alpine amp stopped working while i was driving.

All fuses are ok.

The input voltage was measured at 12.4v with car off

RCA cables are good.

Amplifier grounds are good. (Other amp's ground is hooked up to same spot, so its good (sanded down to metal and bolted down really good on chassis))

Output voltage to subwoofer is 0v //content.invisioncic.com/y282845/emoticons/frown.gif.a3531fa0534503350665a1e957861287.gif

Gains were also set properly, and my IDQ was receiving 400w.

What could be the problem?

Click to read more...

 

[Grinder1989 5,000+ posts]

Does the amp power up at all? Is in in protection?

 

[Ellsworthz 10+ year member]

same thing happened to me a few weeks agao, my fuse came loose so it wasnt sending power to my amp, check the fuse.

 

[gangstajpimpin 10+ year member]

Power is 12.4v at the amp...so fuses are good, i replaced both 30A fuses on the amp as well, blue light is lit up, its just not putting any power to the output of the amp //content.invisioncic.com/y282845/emoticons/frown.gif.a3531fa0534503350665a1e957861287.gif

 

[Maddogg7888 10+ year member]

bad rca's?

 

[05fronty 5,000+ posts]

what are the ohm's on the speakers? set to low? maybe blown fets?

 

[gangstajpimpin 10+ year member]

RCA's are good.

IDQv3 is 4ohm

 

[05fronty 5,000+ posts]

RCA's are good.
IDQv3 is 4ohm

so it shouldn't be too low then. do you have another amp you could swap to see if there is output?

 

[gangstajpimpin 10+ year member]

i dont //content.invisioncic.com/y282845/emoticons/frown.gif.a3531fa0534503350665a1e957861287.gif

 

[05fronty 5,000+ posts]

i dont //content.invisioncic.com/y282845/emoticons/frown.gif.a3531fa0534503350665a1e957861287.gif

hmm. nobody you know with a amp you can hook up to see if you have a signal coming from your deck?

 

[gangstajpimpin 10+ year member]

I have signal coming from my deck because i swapped my comp rca's for my subs rca's

 

[05fronty 5,000+ posts]

I have signal coming from my deck because i swapped my comp rca's for my subs rca's

ok then you might want to open your amp up to see if your output fets are bad. did you smell anything burning? you are positive your ground is good also?

 

[gangstajpimpin 10+ year member]

didn't smell anything burnt. what do output fets look like? sorry for being a noob haha

 

[Grinder1989 5,000+ posts]

Blown powersupply. You'll need to get your amp fixed.

 

[05fronty 5,000+ posts]

didn't smell anything burnt. what do output fets look like? sorry for being a noob haha

no problem. you have a dmm? can you take pics of amp internals? output fets have three legs