Great music in my Barracuda for only $70.

70dart340 said
It would be perfect if you could wire the rechargeable speaker to be powered form the car electrical system.

Depending on what voltage the speaker takes to charge, that can't be too hard

I'm guessing most of em now use a USB wire to charge it
Not too hard to wire a USB plug somewhere in the car

(I have one wired into the ratchet shifter housing)