I have a Model S P100D with the UHFS package, but I'm looking to upgrade to an audiophile system. When I first listened to the UHFS, I was not impressed at all, but now, I feel that the sound has gotten better. I created another thread on this forum asking for advice on the best aftermarket system and I have also done some independent research. Just when I thought I was ready to move forward with a quote I had received, another audio expert mentioned to me yesterday that the recommended amps (2 ZERO4s and 1 ZERO3) are NOT practical for use in a Tesla because they simply draw too much power and they are also heavy! Below are the main components of the system that I'm considering. Qty Item Name Manufacturer Item Description 1 Utopia No.7 Focal 6.5" 3-Way Component (no xover) 1 C6 Illusion 6.5" Component Kit 2 ZERO4 Mosconi 4-CHANNEL AUDIOPHILE AMPLIFIER: 2 X 100W, 2 X 200W 1 ZERO3 Mosconi 2-CHANNEL AUDIOPHILE AMPLIFIER 1 8to12 DSP Mosconi DSP/LOC (8in,12out) includes bluetooth programmer 1 Carbon C10XL Illusion 10in Subwoofer Would these items above overload the 12V battery? I also plan to install a Thinkware 770 or Blackvue DR650S dashcam.