My problem is whenever i play anything, even on low volume it will just cut out and the red light below where it says protection will flash and i have to turn it of at the mains to get it going again, yet it will do the same 5 minutes later. Anyone got any solutions? cheers.
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The protection only should come on, when the power amplifier has to give more current than it can deliver. (electronic fuse) If in the music is a lot of subsonic, sound, so low you can't hear and your speakers can't produce, this could cause the problem. Normal CD players will cut of all frequencies beneath 20 Hz, but it could be your PC is giving everything from 1 Hz and above. I would certainly try to play some music over a CD player and check if that would solve your problem. Not sure if that works, what you could do to suppress the sub sonic in the computer music.
Do you have a capacitor????? If not, when its up loud and hitting hard it might be going into protection because of a voltage sag....If it goes below 11.8v they will usually do that.....Get a multi meter and put on the hot and ground of your amp when its playing loud and see what the voltage is dropping to.....If its going below 12v, thats your remedy...gd luck....
Normally this means that the power supply or the load is incorrect.
Have you very low impedance speakers ?
Have you tried disconnecting speakers from amp and powering it on.
If it does and you do not get any protection light you need to investigate your speakers.
If the amplifier isnt burned out, there is a good chance that one of the speakers is improperly wired, causing a short circuit. The amplifier is tripping the fuse to protect itself. These fuses **** themselves every time you shut off the unit. At very low volumes, the amplifier doesn't detect the short.
With your multimeter set to DC volts, the black meter lead on the ground terminal of the amp (not on the point where the ground wire connected to the vehicle) and the head unit on (so the amp will have remote voltage applied), touch the red lead alternately to the B+ and remote terminals of the amp. If the voltage is below ~11 volts, you need to check the wiring feeding whichever line is too low.
If the voltage remains near or above 12v, the sub may be damaged. You'll need to measure the resistanace of the voice coil. It shouldn't read less than ~85% of the rated impedance.
It sounds like you either have too low of an ohm load or the voltage is dropping at the amplifier's power terminal.
With your multimeter set to DC volts, the black meter lead on the ground terminal of the amp and the head unit on (so the amp will have remote voltage applied), touch the red lead alternately to the B+ and remote terminals of the amp. If the voltage is below ~11 volts, you need to check the wiring feeding whichever line is too low.
If the voltage remains near or above 12v, disconnect one speaker and see if it shuts down. If it doesn't, disconnect that speaker and connect the other speaker. If it only shuts down with both speakers connected and the voltage is staying above 12v, the ohm load is probably too low and you'll need to rewire the speakers.