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Advice - Capacitor\Second Battery

Technical & Advanced Car Audio Discussion - DIYMA Car Audio Forum -
Hey guys,

new here and need a little help.

I recentley bought a VW Passat B6 2007.

Hooked it up with an android head unit and now i want to upgrade all the system, which actually not so bad (factory speakers are blaupunkt components)

it's just not enough for me.

So, i got 2 sets of JBL GTO 609C Components (4 components)

that run on 3 ohm and rated as 90w rms. (one for each door - front and rear)

1 JBL CSX - 1400BP Subwoofer which rated as 350w rms on 4 ohm.

and 5 ch Amp - Pioneer GM-D9605 that output 1x350 rms at 4 ohm and 4x75 rms at 4 ohm. (the amp is 2-4 ohm)

also i have a 4 awg kit to wire the amp to the battery (72a)

all the speakers is going to be connected with 14 awg wires, and the subwoofer is gonna be connected with 10 awg wires.

I am attaching a diagram of everything and how i planned to connect everything.

Question is do i need to add a second battery or that my car battery can handle that?

and if i do how much amperage should it be? (does it have to match the car battery or that 55a for example can be enough)

also, i have heard that a capacitor is used for that purpose as well, but i am not so familiar with capacitors in car audio.

i understand that the unit to measure capacitors is farad, so if i need one how do i calculate how much farad i need?

i have looked online for some info but i get mixed opinions.

also the local car audio stores in my town are not so "pro" and frankly they have nobody that actually could answer my qustion (cause they dumm lol )

anyway, any help or advice will be great.


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