Ok, I hooked up my Orion 4004 amp today, and perhaps I never noticed this before, but, after running the wires to the crossovers, then to the speakers, I am experiencing this hissing sound... almost like static, but slightly different....

It's driving me crazy, and at 1am when I finished it, I was about ready to shoot the dang speakers...

What could be causing this???

Does anyone know?

 

my radio does that when I have my phone near it[:'(]


but it sounds like it could be a bad ground or wires touching.... but I dont know too much about stereos.

 

Wires aren't touching, so maybe it is the ground then...

Crap.

 

Yup had the same deal in my car, never got around to fixin it since it was going up for sale but you're going to have fun. Let me go dig up the info I found before...

My first guess is that you have a ground loop in the system, checking all the grounds is definitely a good idea. Also won't hurt to take the head unit ground out of the factory harness and ground it close to the head unit (Assuming it's not the factory HU)

Ok found something, start with this: http://www.termpro.com/articles/noise.html

 

when i installed my system the hiss would come and go. sometimes with the headlights on and sometimes with the blower fan on. what i found was a pinched wire had broken threw the insulation and every now and then would make contact with the metal part of the truck. so in order to find the hiss start dissconnecting one r.c. plug at a time to isolated it. if you did not use r.c. plugs for the install. get some.also make sure you use the proper guage wire fot the install. i belive mine was 4 guage.

 

Ya, I was talking to a friend of mine and he informed me of the ground loop issue as well...

Well, looks like I'm back to continue tearing my stereo apart...

Oye...

 

If the hissing only occurs when the engine is running that can be caused by cheap RCA's getting interference from the power wire. make sure that the power wire is far enough away from the RCA's that it wont get any feeedback.

 

Actually if all your grounds are good running next to the power wire won't make a difference. If you go over to the12volt.com you can find a lot of threads where people have asked about that and it's been disproved. You'll only get noise over the RCA's if your grounds aren't good enough.

 

yeah...what guage is your ground wire?

 

First thing make sure the gain(s) on the amp aren't set any higher than halfway. Second, check for a clean ground, and make sure the ground wire is at least 10 gauge and no more than 8" long. Another thing you could do is trace back the neg(-) cable from the battery to where it connects to the truck, remove it, grind it down, and replace it. A lot of times there could be paint between the connector and metal cuasing a unclean ground. If you connected everything correctly, followed the above steps, and used RCA wires and not speaker-level inputs into the amp, there should be little to no noise coming out of the speakers other than what you want to hear.