Hi I am planning on putting my xbox in my car. (1996 Renault Clio). The xbox will be installed with a modified M1-ATX to support the 3.3v standby power the xbox needs. Just wondering If the car will be able to power these:
XBOX with DC-DC powersupply
7" Single Din Screen
2 Headrest Monitors
1000W Amp
Speakers Sub etc
Maybe a capacitor if needs be. Please advise.

Thanks