I have after market: head unit, amp and speakers. How can I narrow down the source of the whining noise? I've had this after market setup before with no whining noise but now the whining noise is there. HELP

 

Whining through the speakers usually indicates a bad/weak ground. Check the ground for your amp- make sure its bolted to unpainted metal.

 

Thank you. I did try that but no luck. maybe I will try grounding it somewhere else.

 

did you wire it up yourself? Make sure your RCA's are isolated from all other wiring, and your speaker wire away from power cords as well, that is the main cause of whining, check your grounds as well as mentioned, keep them as short as possible (18" is spec dont go much more than that)

 

A good ground is one of the bolts holding down your seat beat I believe.

 

Make sure you go a good job sanding around your ground point.

 

does it happen when ur cell rings ? or all the time

 

thanks for all the suggestions. The whining noise is at all times and when my cell rings

 

then thats the wiring, something is either not grounded properly, or stripped wires are picking up interference

 

actually I meant NOT when my cell rings, the whining is on all the time. It gets louder when I accelerate

 

bad ground somewhere/power wires too close to speaker wires/exposed wires/bad connection

 

if the amps in the trunk ground it to one of the wheel well lower corners, that where the most meat is. also like I said short as possible, and same guage as your power wire, but check your RCA's first.

 

apparently the source of the whining noise was a faulty headunit, I got my headunit replaced and whining noise is gone. I guess when my amp shorted out, it damaged my headunit.

Thanks for all those who helped.

 

What system do you currently have in your car