ok yesterday I was playing music in my car and my box just sped playing and when I checked the two 20 amp fuse and both of them burned out so I took it out and I had two spare fuse soon as I barley dropped it in the amp it sparked and both of those blew too the car was not even on what could be the cause of that?

just now i took a piece of wire and wrapped it around the fuse and tried it back but it started sparking up and the wire around it burned off i have no idea what the problem is

 

Check your connections from the battery back. Sounds like you have a power wire touching ground somewhere.

Either that or your amp could be blown.

 

my confection from the battery is fine no power write its touching the ground wore I had a terr just now I tested the ohms on the amp the right channel and left channel showing 0 but when I bridge it it shows 4 ohms which is what it was all the time so I have no clue what the problem is

 

I'm more curious if you have a wire that's chaffed along the way or if one of the connections at the amp is arcing.

Does the amp blow fuses when it's off or only when it's on? I assume the amp has a remote turn on connection from a LoC or the head unit and it's not on all of the time.

If the amp blows fuses when it's off, it's an electrical problem or the amp is dead. Either way, pull all of your fuses and pull the amp. You'll need a friend (or an audio store) with a 12v test bench setup who can help you test it.

If the amp doesn't blow fuses until it's on, it could be your speakers. Normally an amplifier with a blown speaker would just go into protection, but if the amplifier's protection circuits aren't that good then it's possible it could be trying to fire up with too low of an ohm load and blowing fuses. So, is it possible for you to get an ohms measurement from each speaker inside of the box? If you can, check the ohms on each one. They should read close to whatever they are rated for. Usually they're a little bit lower than what they're rated for, but not by much. If you get a really low reading from one of your woofers. It's time to replace them.

Good luck man!

 

I tested the woffers they show 3.9 ohms which is perfect but the fuse blow when the amp is off the car is not on at all and it blows. ill try to find an audio store and see if they can test it

 

hows the power wire ran could it of cut itself on the hole in the firewall or the ground of came loose. check that 1st.

 

no it can't I test the power all the way where the amp is and its getting 12.3volts so i don't know I think the asp is gone but ill leave it like that and wait till next year and replace everything

 

that means nothing if its grounding out it wouldn't show less voltage but could start a fire if not handled right

 

the voltage is fine I think the amp is finished ill take it somewhere and get it tested

 

But that's what he's saying, if it's grounding out it won't necessarily show less voltage. Just because you're getting power on your power wire doesn't mean that it doesn't have a problem somewhere along the way.

Hopefully it's just your amp though. I will say it's odd that it throws fuses when it's not powered on though. That's not a good sign.

 

tomorrow i will just rip out the system and check all my wires and put the ground somewhere else and see what happens but i dont see how the fuse can blow when the car power not on that's weird

 

Well the amplifier does have capacitors and such that will charge up as soon as you connect power to it. It doesn't have to be on for that to happen.

I just thought of something... from your meter readings it looks like those are 4ohm woofers. Do you have them bridged into that amplifier? If so, that's a 2ohm mono load you're presenting to the amplifier and I'm wondering if it's rated for that. It's quite possible running at that low ohm load caused it to overheat and melt down internally or something.

Just a hunch. Check the spec sheet on it and make sure it's rated for 2ohm mono.

 

no its not a mono amp its a 2channel amp but its rated 2ohms and i always had it bridged which made it 4ohms.

 

best of luck

 

ummm...bridging reduces resistance does it not? So, if you had 4 ohms and bridged, wouldn't it now be 2 ohm's?

 

true but i dont know. i think its ran its life course

 

That is correct. If you bridge two 4 ohm woofers you get a 2 ohm mono load.

Sorry to hear you amp toasted on you man. That really sucks! Good luck with it though.

 

its alright I think it died from over hearing because I have it behind my back seats and it had no air flow back there so I'm thinking that's what killed it ill have to fine some where else to put my new amp but im not planning on getting now im going to upgrade everything just like ekrunch did

 

ok just took out the amp and smelled it and I can tell its burned out so ill have to get a new one

 

Just a heads up, I checked into that amp and it's not 2 ohm mono stable so yeah, it was probably running really hot with those two 4ohm subs bridged on it! That would definitely explain what happened!

Just in case you were curious as to what might have happened to it!

 

yea that makes sense I'm gonnna take out the subs I have in the box and replace with with a much more powerful sub and a decent amp