OK
@Chris I think you will be happy with what you are getting...Thanks to Amazon 1 day ship, I added, very cheaply I might add, to my existing Sony head unit, This replacement sub, I actually bought a while ago and was very under powered by the stock amp.
https://www.amazon.com/gp/product/B000EFMPCW/?tag=wranglerorg-20
Added this amp for the sub - actually fit in where the factory amp was, used power leads and remote turn on lead from the old center console plug, RCA cables out from head unit.
https://www.amazon.com/gp/product/B00B5MUJ3U/?tag=wranglerorg-20
also added 4 x 6 baffles to dash kicker speakers I bought a while ago.
Bass is 1000% better actually feel it vibrating/blowing against me. What really amazed me was once the rca jacks were set in the radio the head unit seemed to correctly send the highs to the dash speakers. I never could hear these dash speakers before, now they are ridiculous! Like an entire new system.
Next is the pod speakers going with 5.25 polks.
So what you ordered is way better than the above, I do not think you will need a 4 channel amp to power the rest of the speakers.