Yes it is enough, when i had 2 subs it was wired to 1 ohm, didnt have too much of a voltage drop. Now that its wired to .67 daily it is dropping more than id like to see it. I might get a 3rd kinetik, i will do dual alts eventually. And yes im running stocker up front, no problems, usually your not going to see an issue running different batteries. at least i have never with all my vehicles.
that sounds nice, ive always wanted to hear those axis, they look nasty in videos. my buddy here in WA has a trailblazer with 2 18'' lvl 5's off a sundown 4500d, his whole truck looks like jello with those beasts.
he needs a 4500 on each running those LVL5's.. and 18's at that.but would need 3-4 alts and atleast 3-4 good batteries to keep up.
i was originally doing 2 audioque hdc18's with 3000rms on each when i got rid of the 3 13w7's i was running but ended up with the axis b/c i got a great price.
as much as i love kinetik 2400's... XS Power D3100 out perform them easy. i also really like the powermaster batteries the XS Power D3100 are around $350 though vs $225 for the kinetik's...
you mentioned you'll eventually do dual alts...just wanted to let you know you can get a dual alt kit with a 300amp alt for $500