Quote Originally Posted by r-r-redEuro View Post
well im running the LC6 aswell, i get the hiss aswell but i put my gains on lower so its not noticeable. what i reckon its the lc6. i went to another audio shop and they told me to go back to where i got it from and get the lc7 thats a new one.

but if you try it and find a solution to solve the hiss with the lc6 im interested =)
I don't think that it is a fault with the LC6 considering you and I have a very similar set up and a similar problem. It is more likely to be a ground loop. Do you ever have a whistle through your tweeters that changes pitch with RPM?

LC7 is the exact same as the LC6 except with iPod input. You can get a Dension unit which does this straight into your HU that will use your steering wheel controls.

What I think the hiss is coming from is the difference in potential between the stock HU, the LC6 and your amps. I'm not sure how long you ground is from your amp + LC6 but because it's not grounded where your HU is, this might be causing the hiss. I'm thinking of going the cheap way out and buying an external sound card for my G4 and running RCAs instead of using any LOC. I will try to find out how to fix the problem first but at the end of the day, stock HUs are simply not designed to be amplified.