I was listining to my stereo the other day while driving and it suddenly stopped playing. I have two amps,one for the bass(JBL 1200.1)and the other for the mids and highs(250.4) well the bass was still kicking but my mids and highs were gone,anyway I checked the fuses on the amp later on that day and seen that they were popped so I tried to replace them and they popped right away on contact. I disconnected the power cable from that amp and tried it again and the same thing happened. I went to a sound shop and explained the problem to the guy that works there and he said right away that my amp was the problem and that I'll need to fix it or get it replaced. Does this sound right? I dont want to buy another amp if I don't have to.

 

You disconnected the power wires and it still popped the fuse?

 

No, I disconnected the power cable then put the fuses in the amp and connected the power cable back on the amp and as soon as the power cable made contact with the terminal, the fuses popeed,sorry for the confusion.

 

Take the amp out and test it in another car. Could be a pinched wire. The sound shop guy seemed hasty to replace the most expensive part of the stereo without doing any simple tests.

 

Will do, I'll let you know how it turns out. Thanks

 

I've had an amp fuse pop like that when hooking up the power wires, which is why I typically remove the fuse on the amp until the power wire is connected, then stick the fuse in last to complete the circuit. It may solve your problem. As for why the fuse blew in the first place, there's no telling.

 

Be carful doing this. If the amp is at fault, you could make thing worse. If the amp has shorted switching FETs, putting the fuse in last can cause arcking and damage the fuse terminals. But at his point the amp is already bad, just can make it more $ to fix.

Try disconnecting the speakers from the amp and see what happens. I don't think any of this will help though, it really sounds like the amp has problems. If it blow the fuse right away, I'm betting shorted switching FETs. If it was the outputs the fuse would blow a few seconds later.
At this point I'm leaning to the amp being bad, hope not but sounds that way for now....

 

where is ur ground?

 

ive seen this problem alot on rockford amps, replace the fuse and it just pops it as soon as it makes contact, its usually a short inside the amp, other than that unless there is a pinched wire someone then more than likely its the amp.

 

It happened to me on my sony amp once. It actually took the fuse after like 2 fuses later..Check your wires make sure theyre not crimped someplace and let us know.