road noise with new amp/speakers

I recently had a memphis amp installed with all new door speakers memphis m class and 10inch sub in my double cab. The system was all hooked up to my factory stereo I don't have the JBL audio package also. But now i get road noise even after the filter has been installed to cancel it out. The place I installed it at said a new head unit would clear the problem up. Im just wondering if anyone else has had this problem? Don't feel like spending $500 or more for new radio and the problem not be fixed.

 

Do you get a whine? It might be that you need a better ground for the amp.

 

It's not road noise if it comes through the speakers, it's ignition noise +1 on good amp ground. If they ran the RCA's near power leads, or used the high inputs instead of the RCA's, you'll get the whine.

 

Anther +1 - Grounds cause more audio problems than almost all other problems put together. Amazing how many people want to use a seat belt bolt, etc., when that is highly suspect as a ground. And if they used Line Out Converters (LOCs) to drive the amp, they should have run speaker wire all the way to the amp, then did the LOC thing, with as short a length of of RCAs from LOC to amp as possible.

 

x3 on the ground wire, i had this on mine where it whined like crazy, also depending on where your amp is look and see if your RCAs are getting hit by anything, i had mine under my seat and thats what was goin on and I was getting a ton of ignition whine

 

Also whine can come from gains turned up too high.

 

well I brought it back to the place I had it installed they we grounded the amp, and cut 6inches of wire said that it would help.....it doesn't

told me they have an adaptor to decrease the noise if it still bothers me or to just change the radio

 

Does the noise vary with the RPM of the engine?

If you want to try troubleshooting this yourself I think first we need to know how the system wiring is going from the OEM stereo to the Memphis amp. Does it use speaker wires all the way to the amp, or did they run line out converters and RCA cables?

 

not a clue about converters or rca cables not very knowledgeable on that subject its a professional place so im assuming it was done correctly and they have assured me on they have tried everything to stop the noise i have gone 3 times to see if there was anything more that could be tried

at first it was really horrible but a noise filter was placed in and cut it by 80% so imma see if the more powerful version of the noise filter if not ill go get a second opinion