Amp Sometimes Turn On/Off

[beeza]

Sorry,should have been more specific.I meant the fuse running off the positive side of the battery,on the power cable.
If the fuse isn't making a good connection or the wires at the fuse.But an exposed wire touching the chassis can make it cut out.Just check all connections and wires.

It can only be the amp or the wiring.

The wires should run down the side of the car under the trimming.That just pops in and out.It's not hard,just follow the wiring.

There's a grounding strap off the amp,if it's too short that can cause it to cut out.

Is the amp old,it happens over bumps,could be old sensitive.But probably the wiring.

[spiralshock]

kool, i will inspect the wires.

[_matt07]

nah if the fuse is gone it wont turn on randomly..could be a faulty connection that is touching and separating as you drive

[dahon]

it most likely isnt a fuse,
as the others said use a voltmeter to monitor the amps voltage inputs... and yeh check your wiring... did u wire it to the battery direct or did you stick a switch in between?
also when you wired it to your head unit did you wire it to the trigger switch (usually a spotted cable that when you turn on your head unit itll send a 12v pulse to trigger turning on your amp... check that, that may be faulty - ie your head unit may be triggering the amp for no reason)
what i would suggest is to recreate what happens to the amp... turn the system on and shake it and see what happens.. or turn it off and do the same thing...
if all the external wiring is secure and working you have a problem inside the amp.. then its most likely a loose connection, switch or circuit...

[spiralshock]

ok i fixed the issue>>the pwr wasnt going to the amp cause of corrosion of the fuse next to the battery. anyways another problem arised. the sub now makes noise like squeeling, but it still pumps. so when i turn the volume up, its ok i cant hear the squeel but when the volume is down or 0 i can hear a squeel coming from the sub. Also when i start on the car with the volume on 0 i hear like the engine noise kinda thing pumped through my sub, what u guys think it is? mayb i try record the noise?

[beeza]

Sounds like the amp or the wires.First just jiggle the wires around and see if you can find anything.

[dahon]

amps low pass filter on? change ur crossover settings to a lower frequency... along the lines of 80Hz? might be that the sub may be trying to pump out higher frequencies... and all ur getting are squeels...

[trism]

nah its not the LPF, that wouldnt affect it.

is the squeel only when the car is running?

does it increase when you rev the car?

if so, its caused by a ground loop issue

meaning the amp is grounding out on teh chassis of the car

the amp should not be touching the car metal to metal anywhere

if it is screwed down, check to make sure that its not screwed irectly to metal, or that the screws dont hit metal

[dahon]

ahh ic ic...
chuck carpet under it... hehehe

[trism]

yup exactly

or, get a bit of wood, like mdf, liquid nails it to the metal, then using screws that wont go thru the thickness, screw the amp to it

[spiralshock]

yeh i noticed it only squeels when the engine is on, the amp is mounted behind the back seats, with 4 screws. i dont understand what i need to do lol.
it the squeel doesnt increase if i rev the engine, infact it decreases, only when i idle u will hear it or volume down.

[trism]

checkl what i said anyways

make sure the mounting screws arent screwed into the metal of the seat back