Picking an Open Baffle speaker for 2w SET amp - plus bonus question !?!


https://imgur.com/a/PCQXpKa

I recently purchased a Decware Zen Triode 2.3w amp and want to experience what an OB speaker sounds like - with a budget of $1000. I do own 2 REL T5 subs that could be put to use if needed, and from looking around, especially on the Decware site, one obvious choice would be a Caintuck OB with either a Betsy or Lii Fast-8” full range driver. Others on the user forum site rave about the Lii 15” driver (in the same baffle) for offering a much fuller sound.
Where I get confused is primarily if I should go with one of the 8” driver options or with the 15” big boy. I am guessing the answer will have a lot to do with my particular room situation, which is very restrictive and from what I have read not ideal for OB speakers.

I am hoping someone with more experience could take a look at my odd room (floor plan & a couple pics attached) and make an educated guess what would perform better in my set-up (15” or 8” plus sub).

There are two rooms I’d like to try this out in:
One is my office, a “tidy” 12x12’ box.
The other is the more complicated space, a living room with an interesting layout.
https://imgur.com/a/PCQXpKa
The bonus question:
Is it possible with the addition of another device (and what would that be??) to control / set a crossover frequency for the Decware amp, when connecting a sub via the speakers tabs from the amp?

nkphoto
At that budget level, you are probably looking at a DIY project.  Tangband makes some decent fullrange drivers that might work out reasonably well.  Open baffle would mean that the required wood working would be minimal.  The problem with even a speaker as small as 8" is that high frequency dispersion becomes extremely narrow.  The fullrange drivers get around this by employing a "whizzer" cone.  A 15" driver would have an even narrower dispersion.  Because you have subs, I think 8" would be the way to go.
You can find Emerald Physics OB speakers for a song as they were discontinued. Not to worry, Ive had both the KCIIs and the 3.4s. The main issue is shipping costs can be hefty, depending on where they are. Awesome if you can find them within driving distance
I'd say you would need speaker sensitivity approaching 100 db to work with 2-3 watts. You aren't likely to find that in most commercial offerings.

Oz