When I bought my car it came with an aftermarket head unit installed. It was integrated into the mach 460 amps. There is a really loud hiss or static and sometime a popping sound at low volumes, but when the volume is turned up it becomes inaudible. I've heard that there is some part that I can install to fix this. Can someone point me in the right direction and give me some explanation of what is happening and what part I need and why? Thanks.

 

what kind of deck is in there?

Is the popping noise when you turn it on or off? Check the stick on the forum page and it covers it.

Is the hiss from the tweets or from the woofers? They probably wired into the factory amps, I generally recommend going around them. Page 2 of my cardomain page covers how I integrated into it in my 94, check it out and hit me up with questions and we will get ya through it.

 

Its a Pioneer 3100. The popping is when I turn it on, but it doesn't always happen. The hiss comes from the tweeters and the woofers. I believe that the deck was installed the same way as on your car domain.

 

the popping noise is just because the stock amps want a 6v input to turn them onwhere your aftermarket supplys 12v. This does not harm anything other then it sounds bad.

The hissin noise is probably because they wired the speaker outputs into the stock amps for the tweeters rather then using the bypass hrns(the one I point to on my cardomain site).

 

I just checked and the hiss is only coming from the right tweeter. Would that be a blown speaker or could that be a bad connection or something?

 

blown speakers do not hiss.

it is probably a connection somewhere in the line or it could be the factory amp.

 

Do you have any ideas where to look for problems or how to test the amp?

 

I would start at the HU and work my way down the signal chain. pull the radio and they wiggling the hrns's and connections to see if it makes any difference. Then look at the factory amp that is below the deck and see if wigging the connections or tapping on the amp makes any difference. If that doesn't do anything then go to the door.... Trouble shooting sucks which is why after installing myself for so long I will not put ANYTHING cheap in my audio system that I expect to be perminant. Do it right, do it once, done..........