Well im gonna break down and ask .. I have a brutus 1800 sub amp with a kicker s12 sub; and my issue is that everytime I hit the brakes or turn on the blinker, lights etc. It makes a thump, and has a slight hum when the truck runs (changing with the rpms). I have checked ground and made sure the power and rcas are separated from interference. Any ideas? Im stumped :confused: any help would be great!!

 

How close are your RCAs, power and ground to fuel pump, or other wiring in the truck? Are you using a good quality RCA, and proper gauge power/ ground? Also how far away is the ground from the amp?

 

My rcas run down the channel in the doorjam, and the amp is powered directly from the battery with 4 ga. Wire, and the amp has 4 ga. Ground directly to where the jack was bolted in, its about 16" long. The only wiring I can think of that's near it is the power seats on the drivers side.. a friend said that its voltage difference from the alternator and I should get a filter, didn't sound right to me

 

What kind of RCAs do you have? I had this problem in a car before. I had cheapo Radio Shack cables, then I got groundable Monster cables and it went away. The quality of the amp has alot to do with it too. If you have good cables and a good solid ground, I would try moving your RCAs.

 

And on your ground, did you scrape the paint off before you bolted the terminal down?

 

They are the good monster cables, and yes I made sure it was all bare metal, and even checked continuity at the amp.. you don't thinl it could be a power issue?

 

Are you getting a high pitched whine that gets higher with revs? Its usually a patch cable issue. As long as all your power and ground is routed correctly I would try moving the RCAs. Are you using good terminals on all your ground, power and speaker cables?

 

Ill try moving them and ill let u know.. they are all crimped and heat shrunk (the right way) lol .. ill get back to you with my results I appreciate your help