I have been searching for a shop that has some experience working on Tesla's, and I have not had much luck. I did contact Reus Audio in Orange, CA, but their prices are way too high for me. I'm completely satisfied with the quality of sound, I just want a little bit more base. Nothing crazy, just a little more punch. Basically upgrade the subwoofer / amp. I do not want to be a guinea pig at some random car audio shop, so I was hoping that someone might have some recommendations for me. I live in the Inland Empire Area of Southern California (Riverside County), and am willing to drive to San Diego, San Bernardino, Orange and POSSIBLY LA Counties (depending on the location in LA, probably only Eastern LA County). Any recommendations would be greatly appreciated!