Looking for pointers to power my drivers & soundbar design critique

I'm completely new the DIY audio scene, however I would still like to make a DIY soundbar for my desktop setup. So I'm looking for pointers to learn to, or recommendations on how to power my current driver choices and all the relevant wiring.

I would ideally like a left and right channel from this soundbar for stereo output, along with a hdmi and aux input. The current drivers I am looking at are the:
Dayton audio DSA115-8 4" Woofer x 2 & Morel KT-1 1-1/8" Tweeter x 2

If these drivers are a poor match up, please inform me and would love other known and tested combinations of drivers in order to shrink the vertical size of my current soundbar design.
For the design I have currently it is a 800mm long x 140mm tall x 180mm deep concrete box with a wall thickness of 20mm with a face and back plate made of 5mm thick aluminium sheet metal. If this design allows for a top mounted or maybe even a bottom mounted sub woofer on the soundbar please let me know, and if that's stupid let me know that too.

Would love the help educating myself and all advice and suggestions would be awesome to get this project moving along.
Attached is a render of the current design for reference.
 

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