I always wanted to use this one:
You did great with those purchases.
1) Pioneer makes some great head units, out of the name brands they are right up there with Kenwood and Alpine as the top 3, IMHO. I assume you have no CDs to play and are a streamer, and this unit has BT 4.0, which should be good for you. We are up to 5.0 now, but you will be a-okay with 4.0. This head unit has some neat features to integrate with your phone. Hopefully you are playing around with those functions to see how they work.
2) Those Kicker 47KSS504 are the (i) best economical, (ii) readily available and (iii) easy to install upgrade to maximize sound improvement in our TJ/LJ. Great choice and let us know how they sound?
3) Again, pairing these C Series Kickers are great, 6.5" to get a little more bass out of them over the 5.25", plus they have a nice sild 3/4" tweeter to "fill" the rear sound.
4) Solid choice of amplifier - Small and compact, and a great pairing for the Kicker speakers.
5) Great idea for that self powered sub - although I am a fan of tradition subs, this is a great way to add some bass into our TJ/LJs while keeping our limited space available, and not making our TJ/LJ prone to theft.
I would also look at the Kenwood KSC-PSW8 or if you want to spend a couple more bucks, and if you can fit a 10", I would look into this BLAM version. Ground Zero and Phoeniz Gold also make some nice 10" slim lines, but they are way more expensive than this BLAM.
https://www.walmart.com/ip/Kenwood-KSC-PSW8-Ksc-Psw8-250W-Compact-Powered-Subwoofer/984093311
https://incartec.co.uk/product/Blam...bwoofer-with-built-in-250w-amplifier-BL-MSA25
That amp was so sick that you had, I really wanted to make you an offer to buy some of the system from you. Your system was as good as it gets for a TJ without making a target for theft.