@deep_333Erik built his own center and solved the problem. He talked about his design in one of the posts above. Enjoy. 
@spenav, i was responding to the diy kit he linked which was priced at 225. For a 150ish bucks more, one can get a finished speaker with all the kinks ironed out by Andrew. Enjoy!
I can only speak for myself.....which is good, because it's wierd when I talk in tongues, but....

The best improvement in my hearing recently, esp. with regard to dialogue in movies, video...and even with my system....

Phonak Audeo M-R (M90)

Beside tinnitus, my mid-frequency loss was quite substantial.
Funny thing, the lows and highs were relatively good to better; just the opposite of most.

Funnier yet, the settings of my eqs' didn't need substantial tweaks.  The benefits of DAC, and setting up 'flat'.  Everything just became more 'clear'.

I'd been considering bluetoothed headphones...now, built-in. *S*
Even on-board eq, but it's parametric....can be run flat though.

Links to my cell as well....

Spouse sez it's the best 6K$ I've spent on audio ever. *L*
Won't argue about that...;)

Go get your ears scanned....you can get surprised, too.
I do take them out if I'm paying attention to room acoustics, though....some additional 'hardware' between the space and my 'space' doesn't 'read' quite the same.  But the + overall is worth it....;)  
@asvjerry 

Good to know but I don’t think I am there yet. 

@deep_333@deep_333

N doubt AJ’s credential is unblemished. Sounds like a sweet deal.