Question of the day for speaker guru's. Parallel o

I was noting there are quite a few good 2-way and 3-way designs on the market, but in general many suffer from lower efficiency or low frequency deficiency.

What does this have to do with anything? I guess I am curious as to why it would not work to buy 2 of a cheaper speaker that has an 8 ohm nominal load and simply run them in parallel?

It would seem that takes them back to the more common these days 4 ohm load, adds a little efficiency, power handling etc…

I realize that the 2 tweeters in the system and acoustic alignment would suffer.
However, I happened to see this design from Daedulus called the “Ulysses”.

http://www.daedalusaudio.com/Ulysses.html

I guess my point is prove me why not with just taking a design from the 8 ohm styles and double it?

Yes there is 2 crossovers and essentially you end up with 2 “Stereo Pairs” of speakers, but seems like in this Ulysses design specifically the way it’s is oriented in the cabinet it would not be of any significant issue.

It seems the giveaway that something like this ulyssesthis is simply a separated or 2 mirrored with 2 crossover design inside is that it uses not only 2 primary tweeters, but 2 ambient tweeters as well saying to me this is some type of Dual 3-way or dual 4-way system in one cabinet on their own networks?

Would the extra entire crossover run in parallel like this have any detrimental effects to your amp? Seems it would just be a higher power handling / thermal handling, and efficiency per channel?

Also, out of the many 8 ohm monitors that you could essentially stack with the the tweeters flipped to the middle why not using the same theory?

This is more of a hypothetical and technical question over putting it in physical action as of course as in many cases there will be challenges to this, but why not just design a good stable 8 ohm speaker and simply use two crossovers to parallel them together into one cabinet? Seems a bit more efficient and cost effective than many of the exotic designs out there.

Thanks