Please Recommend Highly Efficient Floor Standing Non-Horn Speaker Suggestions

I have been very, very impressed with Ascend Acoustics Sierra Tower with RAAL tweeter. I plan to do a write up, soon, but these are my main speakers now. Their tweeters are really top notch; very clear without the harshness of other metal dome tweeters I’ve heard. They are not at the top of the speaker, and that, too, is a design plus. The bass is quite good but, more important for me, they mate extremely seamlessly with my subs.

Don't get bogged down with sensitivity specs, thought these are over 90db, effectively. More important, look at the impedance graphs -- barely dips below 5 ohms, if memory serves. I also have Salks, but they are stand mounts and harder to drive well.

Ascend is a great company to work with. They really know what they’re doing. Very responsive over email, phone. I am driving them with Quicksilver Mono 60wpc and even with KT77 tubes, they have plenty of get up and go. They sing with my Pass XA 25. At the $3k price point, I don’t think I could have found a better match for my gear.

@jtcf I love my Salks, but if you look at a fair number of the speakers on his site, they are not easy to drive. The HT speakers are better but by and large, I would say this is a major lacuna for the company.

Fritz speakers were driven easily by my tube amps. They are delightful sounding, voiced with sensitivity and genuine expertise. I think they provide exceptional value.

@jaudio1 The Ascends offer smoother highs than the Be tweeter and the soundstage is more articulate and larger. In many ways, there is just a more neutral/honest presentation of the sound. I really like the Carreras, and I like my Salk SS6M, but as I listened more — especially to classical symphony, piano, and various acoustic instruments, the Ascends were better windows onto what seemed to me the "real" character of those instruments. Plus, again, larger and more detailed sound field.

@jtcf Thank you! Well, I just know how they sound in my situation, but I was really looking for something with multiple drivers with either an AMT or other ribbon tweeter. The Legacy speaker I heard was too huge and not that engaging. I heard an Apertura which sounded divine but it was $11.5k and, well, no — not yet. The Ascends had multiple drivers, and the RAAL, and the reviews and online comments I read just said to me to try them for 30 days and eat the shipping if I didn’t like them. Well, they were tested with various amps and compared with other speakers, and they were never harsh, even with my low ceilings. They blended perfectly with my Rythmik and Rel subs. So, I kept them. I’ll try to write this up, soon.

@jonwatches1 You offer a great list. I’m saving this! Personally, I wanted a tower with multiple drivers and in a $4k or less price range. The Ascends’ efficiency was proved to me by the way my lowest power tubes handled their load. Again, it’s about the speakers not dipping down and calling on the amp to produce sudden bursts of power. This is what I think makes the Fritz speakers work so well with tube amps. Salks do fine but I think they like a bit more power. Look around 1.5k and 3k hZ on the graph on this page: https://www.salksound.com/model.php?model=SS+6M 

@mikekollar

They are wonderful speakers but you will need a good subwoofer (s) to go with them as the base is the weak spot against others; and don’t let the Ascend fan boys impress you with all of their graphs and measurements and all on that last point. They are a loyal bunch and anyone who says anything negative about this $2700 speaker is a heretic. So again, this is a good choice.

I agree that the towers benefit from a sub, but I find they’re pretty good down low. Unlike some other two way speakers, I find their bass to be honest, not boomy. Sometimes, I find speakers’ attempts to do it all results in bass that is bigger but not better. The Ascends' bass is clear, accurate. A string bass sounds pretty great with no sub. Subs add more down low and open up the soundstage a bit.

To do better than the Ascends, you went up a price class. That’s probably something I’ll do, too, in time. Logical move.

FWIW, I’m not a fanboy, though I don’t think you were calling me one. Here is what matters about the graphs -- they indicate something real about performance. The Ascends just take a lot less power and play evenly. As one real-world correlate, see this.

Highly efficient its horns that’s it. 

That's it? That's the only option? That's the best option?

Bit of a hit and run, friend. What is your reasoning?

I heard the Apertura Edena, and they were much better than the Legacy Signature SE, to my ears. 
You might consider this Apertura speaker, too: 
https://apertura-audio.com/en/products/enigma-mkii/#specifications
Frequency range : 30-30 000Hz / +-3dB
Sensitivity : 95 dB/2.83v/1m
Impedance : 4 Ω

Another option: Sibelius by Pearl Acoustics. I have not heard them. They have reviews on the web, though. Just received via email from Harley at Pearl Acoustics (owner and maker of the Sibelius line): "I can absolutely assure you that the impedance of our drivers, in their enclosures is a true nominal 7,5ohms. The lowest it goes is about 7ohm at around 5hz. It rises and drops sharply around the resonant frequency at 38hz. And rises up to about 16ohm at around 20KHz.  But there is absolutely nothing to worry about here. The Sibelius is easy to drive and very forgiving for the amplifier, from this perspective.”

https://pearlacoustics.com/sibelius-sg/