Please Help! Interfearance in sound!

[TheDem6n 10+ year member]

I have just installed my set of component in a new car, i connected the speaker cable from the amp to exsisting wiring behind the headunit as its a very big problem to get the wiring into the doors in these cars (was told by a car audio installer that the exsisting wiring is good enough for the power i will be running through it) but now i'm getting the interfearence in the speakers! The power cable is run down the other side of the car so thats not it! In my other ca which was the same make i had no problems with this method and i still got same equipment!

So what can i do?????//content.invisioncic.com/y282845/emoticons/verymad.gif.3f39c5c2fd57527b671fad3efdfac756.gif its driving me mad!

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[TheDem6n 10+ year member]

Anyone????

 

[XanderMoser 10+ year member]

What kind of noise is it? Does it increase in volume if you change the HU volume? Is it a whining? Or is it a clicking? If so, does it speed up with engine RPM? Is it just static? What equipment are you running? What kind of car do you have? What's the last thing you ate?