Single driver speakers. Are they worth considering ?

I built these Aveburys by Woden Design, using Mark Audio 12p drivers.
https://www.wodendesign.com/avebury.html
In the UK you can get great advice directly from the designer and from KJF Audio who can supply all the hardware. About £250 for the drivers and other bits and pieces, £80 for the plans, and £150 for quality ply. And the cost of your own time over a couple of weekends. For that money and time it is easy to find out just how great a back loaded full range horn can sound.  If you have the space of course - one of the routes out of the compromises is a very big cabinet. These are 6’ high. 

NO i will pass like great bass detail and highs.

I'd rather pass a gallstone HA. Actually I have single-driver speakers, of course it's all in the application as anything else. Plus we choose our compromises.

Once you listen to a single driver speaker, you will never go back to a multi-driver speaker that is nothing more than a symphony of disjointed monstrosity :-)

Those Charney Audio speakers look great and have some excellent reviews.  It looks like the company is not too far from me in NJ.

Another single driver variation is the Voigt Tube like what was featured in this Tech Ingredients video:

https://www.youtube.com/watch?v=EEh01PX-q9I