After visiting my shop to inquire about adding some bass, and getting a really high quote for a custom box, sub and install, I decided to look online. I stumbled on this system from NVX and figured why not try to do it myself. Well, I did and I am sooooo glad I made that choice. I buy a lot online -- I mean appliances, clothes, everything -- I never thought about buying a sub system online and doing the install myself, but I found the videos, and discussion boards filled with tips so it wasn't bad at all. After a half day for me (sorry I am slow), I am here to say that my Tesla M3 never sounded so good as it does now. The sub is crisp, the box looks like it fits right into the Tesla production line and I have the extra bass that was really missing.