Ok, so I installed a blaupunkt amp to my components. When I first did it, I was not getting any noise, i then added rca's for my mono amp. I don't know what happened, but I am getting real bad engine whine now. I read around through crutchfield and different sites about noise. I made sure the amp ground is good, I made sure the radio ground is good, I routed the rca that is to the components are not near any power. I also replaced the rca's with ones that were from Knukonceptz. I pulled the radio out to make sure the rca's weren't near any power. Can someone give me another point of view to what the problem could be? I also routed the speaker wires away from power. When I put rca's that are not attached to the radio, there is no noise, like ones that are just there. I attached the rcas that are on the subwoofer output and there is still noise. Could a bad fuse on the radio or amp be doing it? Please help, I have spent countless hours working on this. Thanks guys, I really appreciate the help

 

check to see the metal ends on the rca cavbles isnt touching ground at any point...

b

 

If thats not it. Buy a cheap set of RCA's to test it with. You may have just gotten a bad set of RCA's or spliced a wire while running them. Good luck and keep us posted.

 

Today, here is what I tried:

-Mounting amp in a different location
-moving headunit from any sort of power source
-using a set of home rca's to see if my 2 rca cables were bad.
-move power wire away from any power sources or grounds
-Check if rca's were touching any ground

Nothing seems to have worked. I don't know what else to do. Would getting a noise filter help? Crutchfield said it might, but I want to asks you guys. Like this:

http://cgi.ebay.com/ebaymotors/PAC-S...QQcmdZViewItem

 

You are probably using your headunit to control the cutoff for your sub right? Therefore, you probably set the monoblock to accept "full range". Try setting the cutoff at the sub instead of the head unit.

 

Subwoofer output on the headunit is disabled.

 

Then where are you getting the signal to send to the sub? Either you:
1) enable the sub outputs on the headunit, and send those RCAs to the sub Amp
2) Send full signal to the sub amp and set the cutoff point from there

If you are just sending full signal to the amp and then running the sub with no crossover point, no wonder you have whine.

 

There is no sub woofer installed. It is coming through the components. I am going to try a cd player with rca's to make sure it is not the amplifier.

edit: I am going to remove the harness and redo it to make sure there are no bad connections on it.

 

So I worked on it again. Here is what I did:

-Rewire the radio harness
-extended the ground to where the amp is grounded.

I still have the whine. I bought a ground loop isolator from best buy and it worked, but it made sound quality like garbage. I was thinking of the PAC SNI-1 because it says it increases sound by 1.3db to compensate for audio loss. What do you guys think? I don't know what else. I guess next thing i can do is test the rear rca output on the radio, its on the other side of it. Anyone have any ideas or should I just get the PAC SNI-1? Thanks guys

 

I'm assuming this is alternator whine - when you accelerate you hear a whirling noise which is directly related to engine RPM - not a pop pop pop noise (spark plug wire bad).

Is the whine on all sources? Radio/CD/etc. (it's not the antenna ground)

Turn the volume all the way down on the head end. Is the whine still there? (it's not coming from the head end or is)

Turn the gain on the amplifiers all the way down, turn the volume on the head end all the way up and then open the gain on the amplifier slowly until the system is as loud as you'll ever play it. (gain structure wrong or right)

Can you connect the speakers directly up to the head end for a test (checks the amp and head end for direct creation of the noise). I'm assuming you never heard this with before the amplifier was installed.

Alternator noise is a *****.

 

I put a portable mp3 player directly to the amp, no noise. When the volume and gain is all the way down, the whine is still there, it is relative to rpm. I haven't tried to see if it is from the am/fm, i have a perrin antenna and i did not connect the power amplifier, so my reception is non existant. I did however remove the antenna itself from head unit. I have not tried connecting the speakers directly to the head unit, that will be my last resort before getting a ground loop isolator, its a ***** to do all of that. I am going to try to ground the rca's to the head unit casing and ground the casing somewhere else, i have read pioneers have bad grounding. I also replaced the fuse, just in case it was something with that. I am going to try the grounding method here:

http://www.caraudio.com/forum/showthread.php?t=198477

 

I'm an electrical engineer. Your power supply rejection ratio (PSRR) could be bad on your cd player. I'd try to put a big capacitor (~500 uF) from your voltage supply of your cd player to ground, and connect it as close as possible to the cd player. The cap will help so there is only a DC voltage going into your supply, and will cut down on this hummm.. (The cap should only cost a couple of bucks at Radio Shack)

 

I finally got to working on it a little bit, and I did what the caraudio website said and grounded the rca's. That did the trick, no more whine. I do have a pioneer deck, I didn't realize they were that bad. Thanks for all the help you guys gave