Subwoofers sound system?

Question

I have just installed a sound system in my car. For some reason it is giving a loud feedback sound when i close the trunk. It is continuous and never goes away. It's so much bass i can't stand it. What can i do to make this go away? When i open the trunk it's fine. Please help.

Answer 1

do you mean rattling? if so then its your license plate buy some dynamat for $20 and no more rattling

Answer 2

check yo ground wire then check yo rca cables...Ya Dig!!!!