Decided to add a sub to my MS. Had the standard sound, but really wanted to add to the bass. Like another forum member, went with Ernie @ SoundInnovations in Union City. REAL pro….familiar with Tesla and only 5 star reviews on Yelp. Added an Alpine amp (which he hid in the Trunk since I also have the Tesla Frunk bag) and a 12" JL. Adjustable sub nob in the cubbie underneath the main screen. Didn't think I needed the adjustable nob, but sure glad he put it in. A world of difference…..Pics for your enjoyment…..