best in san diegoGo to street noyz, last summer in cali, while in san diego, i saw that place and we stopped in and they def know their stuff, and they had a couple ferraris on display with sweet high end systems. that shop is definitely not a joke. a lil expensive though, but you get what you pay for
go over to diy and talk to simplicityinsound. i know hes in cali, not sure where. but if hes close he does great work.
Post up wat car it is and if somebody on here has access to one they can hook you up.