sundown audio salt 4k

I have a 16 Sierra with a 400 amp mechman alt on two Agm battery’s. One is a Xs d3400 the other an Auto Zone agm running a salt 4 amp, and 3 sundowon U8’s in my truck. Only have one run of 1/0 OFC from hood to rear seat area for my amp but don’t think im getting the full potential of the amp...

As I wait for the ZV6's, I wanna Give Hell to my wolfram audio PT 18's "rated 4000 watts rms"t Sundown Salt Looks like a 12v monster, Sundown Audio Salt series: Sundown Salt 4K: https://www.down4soundshop.com/Sundown-Audio-SALT-4/ 4000 watts at one ohm. Sundown Salt 6K...

IA6.4-R2 - 4 Channel AMPLIFIER - D1 https://www.down4soundshop.com/ia6-4-4-channel-amplifier-r2/ I like it , kinda pricey, want to throw in on my neo pro 8's