Advice on battery in Jetta

[webspace1982]

I am putting together a daily system for my 2006 Jetta TDI, car has 140A stock alternator. At the beginning stages of putting the system in just ordering stuff. I am looking at input on what will be needed to supply my sub stage, It will be a 1 Sundown SAZ-2500D running at 1ohm. What would you all recommend for supplemental power? Big 3 is a must, I was thinking of putting a XS Power D3400 as a supplemental battery in the back? Would my stock alt and stock battery plus an XS Power D3400 in the rear be enough to power this without significant power drops?

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[smoka 10+ year member]

Try 2 agm batts first, wait on the alt upgrade to see if you need it. But need 2 identical batts with the same datecode on them. Either 1 in front and 1 in back, or remove the front one and have 2 in rear.