I never understood the way Tesla designed the SR+ system. They took the system they had tuned to the car, whether it was good or bad, and removed 7 speakers from it. They supposedly tuned the system with the 8 remaining speakers, but there was only so much they could do. But why did they not wire the door and pillar speakers? They were already there and in close proximity to the other speakers and it's all plug and play to them.
I found the sound completely lacking when I got the car. My Honda Odyssey sounded better with the stock system, especially after I added a 3.5mm line in so I could stream hi-res music from my phone. And that's the other thing I dislike about the Tesla sound, there is no way to add an input and the only way to get hi-res sound is to put music on a USB stick. I wanted to stream hi-res off my phone, but using bluetooth downgrades it, I can't plug it in, I can't play it from the browser while driving, it doesn't use DLNA nor Airplay. Music streaming has come a long way since Tesla first designed their system. The only concession to better streaming has been Tidal, and even that is throttled unless you use your phone's wifi hotspot, and still not hi-res. Even Elon Musk thought the audio needed an upgrade, as well as the very slow browser. My Raspberry Pi browser is faster.
I did the speaker upgrades to the Infinity 4032 and Focal ISU-200, and that is OK, and I use only Tidal with my phone and I'm happy enough with it now but I shouldn't have to do all that.