How many batts

[Venom831]

Whats up guys,got a few questions i have.

Im building a wall in my integra.

Going to be running 2 18 TSNS D1

16cu box tuned to 30hz

Wiring consists of 2 singer 270s

4 runs of 4/0 welding cable to the rear

Yellow top up front and 3 D3100 in the rear

Ill be picking up an NS1 in a couple of weeks and wanted to know what other upgrades to my electrical i would need to run the Ns1 at .25 ohm.

Also been thinking of switching to a 16v electrical or maybe even a 18v.

What would i need?

Thanks in advance