I recently installed a Kenwood kdc-bt858u and have the low level outputs wired to send sound to the rear speakers. Front is running off rca to pbr300x2 and kappas. While attempting to turn up the volume I noticed the rears sounded a whole lot more louder than the fronts. I attempted to adjust the fader, but to no avail. Could it be that the fader won't work properly unless you are running both rca's or low levels, and not one of each? Any input will be greatly appreciated! Thanks

 

Well that's embarrassing!. Went back through and realized top rca spots were for the rear... should be in the front. I guess that's what you get when you get into a hurry.

 

Easy fix! Always good when you answer your own question.