Hey guys, i just recently installed a 15" solo baric into a custom built sealed enclosure that my buddies dad made, he's been in home/car audio for the last 30 years or so, so he knows how to build a box. Anywho i got everything hooked up it all works, but i have 2 questions, occasionally i get a high pitched whine coming from the amp that can be heard when u turn the volume all the way down, or when u open up the trunk. I've heard this can be due to the ground point? Also on the amp, i was wondering what my bass boost should be set to, right now it's at 9db at around 60 hz, but i haven't really touched it much yet. What do u guys recommend for a setting of the bass boost in conjuction with the gain to produce good quality low bass? My headunit is a Premier DEH-770MP if that makes any sort of difference? Thanks alot u guys are awesome i've been reading the boards for a long time but this is my first post! Later