faint noise

[grumby13 3]

im very new to car audio.

my problem lies with when my volume of the HU is all the way to zero and i go to my subs there is a faint noise its hard to explain well it's kinda like a hum or a buzz but very quite i tried the ground loop fix by grounding my rca's to the HU and that helped a bit since the noise was louder before and that got rid of it then i found a better bolt for my amp ground so it was more secure and that did not help. so idk what could be the problem.

 

my setup with the problem

HU: pioner DEH x3500ui

subwoofer: one kenwood kfc w3013ps other sub is unknown i was told from the seller it was an older kenwood but im thinking it is a home thearter subwoofer.

AMP: Kenwood x1200m refurb from ebay. the power and ground wires for the amp is 8 awg.

Vehicle: 2000 toyota camry le

 

anything else you need to know let me know

[skaraudio_fanatic 0]

Have you tried taking the ground wire going from the harness off the headunit and just grounding to bare metal? That helps a lot I heard. Also if you have a line driver and be careful when you use it and lower the gain on your amp to compensate that eliminates a lot of noise because it helped when I had my own noise problems. Hope this helps!

[grumby13 3]

line driver???