Open baffle speakers

@bache I take all measurements from the listening position - about 8ft. in front and centered. Also, you can see in the photo that the LXmini and the subs are toed-in toward the listener(s).

But if go 3-4 feet to side the wave from front cone and back wil be eluminate each other

Yes! This is true, you have uncovered (for yourself) another wonderful benefit of open-baffle subs... they don't 'load' the room, don't rattle decorations, don't turn the walls, celing or floors into giant vibrating panels. You might also notice that (despite excessive endeavors to improve the sound) there are no audio-inspired room treatments. Even though I have 'improved' (further minimized) the system since the photo and measurements that I shared - there are still no room treatments. Why? Because they are unecessary - for exact reason you said... the drivers don't radiate sound from the sides (that would reflect all over the room) causing need of room treatments. Now, could the room be improved with treatments... yes, I'm sure it could - but the improvements would be so minimal as to not be worthwhile (for me).

To be find out which is better in you particular room there is best way to make A-B comparision

Again, I agree completely. This is not always possible, but I have endeavored it, comparing many different speakers in the same room and same system (at each time in history). Here's a photo from a previous itteration of 2-ch system, where I was A/B'ing LXmini against ML and Tekton DI's...

The only speakers I've had that have the same 'magic' as LXmini are the Martin Logan e-stats. Problem with those speakers is that the 'magic' only happens in a very small focused frame (head in a vice syndrome). The LXmini take the 'magic' and make it both more spacious and available everywhere around the listening area. Not all 'box' speakers are 'bad'. I've kept a few for various reasons... GoldenEar Triton One's are currently in the basement HT system as mains, GoldenEar Triton 3+ as rear surrounds, Martin Logan Motions as center and side-surround, and ML in-celings as Atmos (GE and ML both use AMT tweaters, so voicing is very similar), Elac were too good a bargain to resell and found a home in the garage system, and I learned a lot during my time with Tekton DI's. The Tekton's don't have the 'magic', but they do some things very well, resulting in me using them to fine-tune the crossovers and EQ of the LXmini + Phoenix(alt) subs. You might ask what 'magic' is missing from the Tekton DI's... they sound very good, flat linear and full-range response that is lightning fast. But when you listen to them, it sounds like you're listening to speakers - there is no 'magic' found in LXmini and other similar dipole designs.

BTW, I have made several in-room recordings of this system posted on YouTube https://www.youtube.com/watch?v=ZxwE9oiZfmM

@mwatsme your system sounds fabulous, especially for such a narrow room. Well done!

Yes , GoldenYear Technologies, Tektone DJ is the Best LS on the market, Really Class A , 

@coltrane1 Thank you for your kind comment. There are several videos of the system on my channel. Regarding the subwoofer topic of this thread, I would recommend watching the video featuring Maggie Rogers "Alaska" - wonderful bass texture on that track.

@mark200mph You were writing about DSP crossovers, and their beneficial capabilities. While some will say DSP flattens the sound (Danny Richie being one), once you have the ability to adjust crossovers, parametric EQ, individual gain and delay on the fly while listening... its hard to imagine not having the capability.  When purchasing pre-manufactured speakers with passive crossovers, you're putting a lot of trust in the mfg that they voiced them to your liking, and that they will do what you want in every room, at all volume levels and across every genre of music you may enjoy. With DSP, you can save presets, and change them at will. I can't imagine a speaker a speaker so perfect that I wouldn't want to adjust it... maybe if it came with its own listening room, had a fixed volume and only played one song? Again, not bashing passive crossover box speakers - my HT system is littered with them. But for critical 2-ch listening, best be able to adjust.

@mwatsme  I still dont understand why the speaker company dont making  a Subs wth open back? Just close box or ported, So stupid ?