Amp in protected mode?

Menthis · 14 Jun 2011 at 22:35

What does this mean?
I had the amp and subwoofer running for about 3 days then it just cuts off and goes into protected mode?
Dont understand what i have done...
Any suggestions are grateful thanks sam

Duke · 14 Jun 2011 at 22:35

Think it means it needs grounding? or is overheating.

Menthis · 14 Jun 2011 at 22:43

Duke said:
Think it means it needs grounding? or is overheating.

Cheers i do believe i grounded it properly, drilled a whole sanded the paint to bare metal and bolted it down.
It was working for 3 days so i guess i did it correctly
If it was overheating would it start working again once it has cooled down as i have left it for a while yet it still hasn't come off protected mode
Thanks sam

Clarkey · 14 Jun 2011 at 22:51

Short circuit or knackered amp tbh.

Django x2 · 14 Jun 2011 at 23:18

What amp is it? Alpine by any chance?

Scrutinize · 14 Jun 2011 at 23:20

Lucero said:
What amp is it? Alpine by any chance?

You thinking the rca grounding issue from the headunit?

Menthis · 14 Jun 2011 at 23:48

Its not an alpine its a cheap amp, not sure off the make amp-480 it says on the front?
Probably the amp tbh what do i expect paying so little for it lmao, just hope it hasnt blown my sub

utajoker · 14 Jun 2011 at 23:51

It's prob overheating. Have you touched the amp when it cuts out to see if it's hot?

Try turning the amp down a little?

Menthis · 14 Jun 2011 at 23:53

utajoker said:
It's prob overheating. Have you touched the amp when it cuts out to see if it's hot?

Try turning the amp down a little?

but it hasnt just cut out, its stopped working and left it over night and its still not working, If it was overheating surely it would have cooled down and been okay to atleast work in the morning for a few hours before overheating again?
Not sure am a noob with this
Probably just my crap wiring?

Stormster · 15 Jun 2011 at 00:36

If you think the wiring is crap, then yes.

Check your earth

Menthis · 15 Jun 2011 at 00:43

Stormster said:
If you think the wiring is crap, then yes.

Check your earth

I'm pretty sure I did this correctly, it was the thing I tried to get like perfect..
I drilled a hole sanded the area till bare metal and then bolted and had a washer on top of it just to hold it in place. It was a metal washer
That is okay?

MikeHunt79 · 15 Jun 2011 at 00:47

Menthis said:
Its not an alpine its a cheap amp, not sure off the make amp-480 it says on the front?
Probably the amp tbh what do i expect paying so little for it lmao, just hope it hasnt blown my sub

The fact that it has gone into protect mode has probably saved your sub.

Is the amp purple?

Stormster · 15 Jun 2011 at 00:55

Have you checked the bolt is still tight holding the earth cable down? Checked all fuses etc?

Menthis · 15 Jun 2011 at 07:46

MikeHunt79 said:
The fact that it has gone into protect mode has probably saved your sub.

Is the amp purple?

Yeh good

And yes the amp is purple

Archy · 15 Jun 2011 at 08:49

First thing I'd try is removing any speaker wiring / RCA connections etc and just leave power, remote and earth leads connected. Try turning it on then to see if its a problem with any of the leads you disconnected. If it runs ok then, reconnect rca / speaker cables one at a time to see which is the issue.

utajoker · 15 Jun 2011 at 09:21

Menthis said:
but it hasnt just cut out, its stopped working and left it over night and its still not working, If it was overheating surely it would have cooled down and been okay to atleast work in the morning for a few hours before overheating again?
Not sure am a noob with this
Probably just my crap wiring?

ah ok, well as one has said remove everything bar the basic to get the amp powered and see if it comes on.

is it from a shop or the internet?

is it not possible to just take the amp back and try it at the shop?

Menthis · 15 Jun 2011 at 10:33

utajoker said:
ah ok, well as one has said remove everything bar the basic to get the amp powered and see if it comes on.

is it from a shop or the internet?

is it not possible to just take the amp back and try it at the shop?

I will try remove everything par the power,remote and ground and see what happens
It was brought second hand from a bootsale... :/ bit silly but i didnt want to spend too much money.. aha

Menthis · 15 Jun 2011 at 11:09

Oh and also i decided to remove the power for the amp from the battery to stop it coming on while its driving while its in protected mode.
Turned the car over the amp still came on and the protected mode LED was off and power LED was on though obviously because the remote wire was still plugged in?
Does this help to discover the problem?

Menthis · 15 Jun 2011 at 11:14

Thought it wouldnt even start up if there is no power cable connected?
Or was it taking the power from the head unit

MikeHunt79 · 15 Jun 2011 at 11:15

Menthis said:
Yeh good
And yes the amp is purple

Ahh, I'm guessing you have an infamous 'purple mosfet' amp, looks a little like this yes?

I've had a few of these over the years, they're pretty cheap and nasty and they don't like being bridged, were you running it in bridged mode at all?