Adding a capacitor + battery

[Jakdj]

Hi guys, just bought a seicento,

Im quite into my djing and music production so looking to get a kick ass sound system on the go

Looking at perhaps 2 10 inch subs and 2 6x9s in the parcel shelf



I own a set of event 2030 studio monitors they are awesome sounding so i need awesome sounding speakers not got a huge budget but will take my time and save for good speakers etc


Im kinda new to car audio so have been learning about amps etc

Im planning too go drives too remote locations where i can sit with my music production software thumping without annoying my neighbours



I will most likely be having a laptop plugged into an amp with no head unit going too the 6x9s and subs



Im looking too perhaps add a second battery with a kill switch so i know when my battery dies i can add a switch and start my engine no problem

I know jbl are quite reputable for sound systems so will probably go with them for the speakers and subs although im open too suggestions


im guessing a deep cycle 100 ah battery would be essential along with a capacitor

I need too know the most practical way of adding an extra battery
perhaps even switching the sound system too its own battery plus

cap but wire it too the alternator so it takes a charge when im driving

Any help would be great

Thanks guys