14awg speaker wire is fine, I think most of my truck is actually 16awg and I run quite a bit of power.I already have 4 AWG wire coming from my battery into the car now the thing that splits up the power and then I run another one I have to see how big that is I'm very limited on space.
Getting the jp95 even though I don't have the room for it in the long run might save me room.
And the company you mentioned to buy their kit they make fantastic product I use their speaker wire their speaker wire is fabulous.
I have 14 gauge speaker wire in my car is that going to be sufficient for everything?
Distribution blocks come in so many shapes and sizes. It should not be hard to find a compact version.
4awg is only good for 150amps of current which will starve the amps if you run them hard on just the 1 run. But adding another run easily remedies that. Knuconepts rates it's kollosus 8awg at 60amp so you could like just run a new 8awg kit to the 4 channel if you want to maximize budget.