Аудио-википедия

https://www.diyaudio.com/forums/multi-way/233045-ae-speakers-dipole-15-lo15-advice.html
https://soundex.ru/forum/index.php?/topic/31768-open-baffle-%D0%B0%D0%BA%D1%83%D1%81%D1%82%D0%B8%D0%BA%D0%B0/

Acoustic Elegance

LO15

IB15

Eminence

Alpha 15A

Pure Audio Project

OB-A15neo

https://www.audiocircle.com/index.php?topic=122661.0

And thanks about your post OB_Newbie. All new ideas are always welcome :)

Let me tell you shortly about my DIY history:

About 5 years ago I had Dynaudio Focus 140 loudspeakers. I liked them. (Overall balance was well suited for hard rock music. I still listen to lots of rock but also jazz and many other genres). But there was a problem with room modes.
Lowest mode, about 41 Hz, had a high peak and it was disturbing too much. I sold Dynaudios.

After that I heard about MJK and I decided to build TB W8-1808 + EA 15A baffles. It was a big improvement. Bass problems had gone away, midrange area was shining. They also worked pretty well with rock music, so I was happy quite a long time.

Later I needed something to do. I build Pencil 12 cabinets with Markaudio Alpair 12 elements, just to experiment something else. Thet were working very well with highest quality recordings, but if I put something ugly heavy metal it was terrible to listen. But I liked the bass quality very much. It was a little bit thin but otherwise very good. Also Pencils had to go.

After that I built MJK's H-frames with my current Fane 18« elements. It was not successful. I don't know what's the problem with H-frame construction, but it's not working at all in my room. Maybe my room is too small and/or maybe listening distance is also too small. Soundstage was way too obscure. Not good.

So nowadays I'm using plain baffles, approx. 70 x 90 cm, with TB + Fane. They are tilted backwards 5-6 degrees. This is the best solution so far.

Based on the bass quality of Alpairs and what I have heard/read about single FR drivers, I would like to experiment with a single driver. Maybe a bigger plain baffle or a winged version. Unfortunately I don't have much time for experiments, too many things to be done, so all ideas are welcome.