Humming Sub

ok, This is wierd, I drive a 98 plymouth noen, 5 speed, I noticed the other day, that there was a humming coming from my sub. I don't know where it came from, because i'v had the car for a couple of months now, and i havn't notived it till the other day. I pulled the e-brake, and it stopped.. so the humming stops when the e-brake is on, and starts when it is off. It's a single output 800W Kenwood Amp, And a 1200W Kenwood Sub. Also , when i slow down and turn a corner it get's louder ( not the humming ) but the sub. I don't know what would make something like this happen other then power problems for something. I have a capassitor, but it's not wired in. Would this end the problem? Your Info and Help would be greatly appricated !!!!!Here I Am.

Check your power and ground connection to the amp. Check them at all points from start to termination at the amp. You may have a bad connection somewhere. You can also check to see if both RCA cables are OK and not pinched anywhere.sparky

Ok, well I got half the problem fixed. I checked all the wires, nothing seems to be wrong with them, But the humming is still there with the e-brake off. Of course it starts again when the e-brake is on. so i'm lost as to what it could be. If anyone else has an idea I would love to hear it. ThanksHere I Am.