New base-model Teslas have no radio

[Dorbiman]

"extension speakers" that I'm not seeing where they appear when selected

They appear in the bed, right by the rear window. I believe they're used in the SUV config for satellite speakers, but I think they'd be sweet for camping/tailgating, etc

 

[AZFox]

I think 2-way speakers in the door with the mid/bass drivers down low and the tweeters in up high near the A-Pillars would work well, or at least adequately.

For music lovers a powered subwoofer is almost mandatory IMHO.

The eyes in the room are all lookin' at the star​

The butts are all shakin' to the bass guitar​

-- Todd Snyder​

It'll be fun to see what audio solutions people come up with.