[NORCAL SS]

ok

amp gain set at 1/2
turn the radio up
goes into protect mode and speakers are dead until i restart the car.


pulled off one speaker lead at a time and each time goes into protect mode still.


took all speaker leads off and turned radio up... amp goes into protect mode.

So pretty much at this point amp is faulty right??? voltage deosnt drop down either enough to put it into protect mode.

 

[Evil SS 2006]

Grounding...

 

[NORCAL SS]

that a trip. Im using the same grounding point for both amps and only 1 amp goes into protect.

Ill overlook to make sure i got all the paint off of the floor.

 

[K5/SS]

Yup. If you grounded the amp to a painted surface, you might need to grind some paint off to get a proper ground.

 

[NORCAL SS]

yah i wire wheeled it. Ill check again tomorrow.

 

[Grocery Getter]

Sound like it may be the amp. Shouldn't be going into protect like you're describing.

But then again, the amp resets and works again when you pull, then reapply power

 

[bottlefed1]

What amp? could be getting too much voltage on start up .

 

[farbeyonddriven]

ground issue, bad fuse?

 

[Nizzle]

Yes paint scrape and give each amp it's own ground too. Double check all connections and fuse. How many watts is the amp and what gauge wire are you using?

 

[illestSS]

Sounds like the amp is DOA. What amp is it?

 

[Chase]

Mine only goes into protect when I play for a long time and it gets hot.
Amps gotta b bad

 

[lolitskasey]

What did you use to set the gain on your amp?

 

[NORCAL SS]

its 4 gauge wire thats to ground knukonceptz its fat wire

 

[Boricua SS]

Sounds like a dead amp to me... I'd take it somewhere to have it bench tested to confirm...

 

[rrmccabe]

If power source is good then I would say amp as well.

But what you are describing can happen with a poor connection in the power system.

How high can you turn it before it drops? Normal listening levels?

 

[lolitskasey]

I would first make sure the head-units eq's are set to flat, no bass boost on either the amp or HU, Check my grounds, and if that still doesn't work back the gain down and see if it still goes into protect.

 

[06WhiteLS2]

Ground x100. I have never ran into protect mode but when helping out a buddy with the amp cutting like that almost has always been a grounding issue def. check the paint surface. Who knows this is a fiat. If your ground is good then I would say your troubleshooting points directly to a bad amp.

 

[lolitskasey]

The 3 main ways i have had a amp go into protect is bad grounds (I prefer directly to the frame), low voltage drop, and gains set to high.

 

[Nizzle]

its 4 gauge wire thats to ground knukonceptz its fat wire

4 gauge on power and ground right? Not just to ground?

 

[NORCAL SS]

4 gauge power
4 gauge ground

both alpine amps have the same grounding point
only 1 amp turns off

i disconnected speaker by speaker and at 75 percent about on volume it would go into protect mode.

Then with NO speakers hooked up it also went into protect mode.