Coulomb
Member
Absolutely save your money for an aftermarket upgrade. The "upgrade system" should have been the base system. It is inferior, has virtually now power overhead, and poor sound in general - and that's with high quality (better than CD) FLAC files. Sorry I purchased it with my 2013, but I hadn't researched aftermarket upgrades at the time. The sound system is the only negative thing I can say about my Model S (so far).