|Ok... Assuming the lack of time alignment is compensated for via a DSP:
There are likely large chunks of the frequency spectrum that go un addressed, and equally large chunks that are mall-addressed.
I would say that there are two main ranges where this system does nothing; one on either side of Mid-Range output... Meaning one in the Lower-Mid/Upper-Bass region (in other words, the range where the human ear really digs in)... And another between the Mid-Range and the HF driver. Also, that Mid-Range driver (which looks like it might be better down lower) mated to a 500Hz horn seems questionable. Running it that wide seems like wishful thinking. Also, the horn plus the adapter look too long for 500Hz (but ok, this depends on curve type).
The most obvious problem is with the Bass drivers, which are left to radiate both to the front (via the horns) as well as to the rear... which in this case really means to the front!... The rear of the drivers are aimed upward at a 45° angle where the sound would bounce off the ceiling, then continue at 45° right down to the listening point, arriving I would guess somewhat late to the party. This is not something that can be fixed with a DSP (the output from the rear of the cone being physically linked to what comes off the front of the cone).
The Bass horns look to be constructed of rubber, or perhaps ABS (plastic)... in any case, not the first choice for rigidity (other possibilty : this user is more advanced than Romy, and has discovered a means of extracting the desirable "Oops Resonances" from a horn!).
So to summarize : Output is likely to be limited to very specific ranges. Forget about Lower Bass. There is likely a semblance of Upper-Mid bass (albeit out-of-focus). The real question is what comes out the mouth of that MF horn when loaded with that driver. As for HF, I would guess it is all alone, highlighting the void below it.
All in all, perfect for playing that copy of "Café Blue" sitting on the floor.
What I see right with this picture : I like the idea of using thick cast metal for the smaller horns... in this case the Mid horns... If only they would have been left with a rough sand-cast surface. Also, though he may be ignorant, you have to admit the guy is at least trying.