Higher sensitivity - more dynamic sound?

While I much enjoy the wisdom, experience and informative posts of Audio Kinesis, Atmosphere and others, the debate of which is best between which combination - efficient speakers paired with a low powered tube amp vs low efficiency speakers paired with a quality high powered SS amp (correct me if I'm wrong) it seems a bit irrelevant unless you are listening at live concert SPLs (104 - 115+ db).

I listen to my system several hours at a time, three to four evenings a week and can't even imagine wanting to listen to music that loud or re-create the scope and volume of a live concert in my home. So, for me, at any volume I now care to listen at, I'd say either combination works very well.

At lower volumes my inefficient 1.7 Maggies seem to perform quite well with either my 100W Rogue, tub amp or with my 200W/350W SS ADCOM.........Jim

Last word in efficient or not, I prefer the big open and natural sound of electrostatics and planers over boxes, hands down, but that’s just my personal preference.

My favorites over the past many years was a pair of (not so efficient) Apogee Duetta Sigs. driven by a Mark Levinson 333. Not everyone’s cup of tea, but was mine.

If all I wanted was loud, forward and dynamic I’d buy a Jukebox.....Jim

Sorry, that was a bit snarky and defiantly not a fair comparison of some of the very nice and efficient speakers of today and even some vintage.

Back in the early 80s, I much enjoyed my Vandersteen, 2Cs but by mid 80s, while looking for something that would make a little larger, deeper stage in my large listening area I auditioned both the big K-Hornes and the large Altec Lancing speakers. I did enjoy the big full stage they presented but decided, even for my relatively large area, were a bit much. I Auditioned and bought a pr. of Quad ESL 63s and fell in love with their deep, wide stage and their organic rendering of acoustic music and voices. Even more so, the Duetta Sigs. I Have been a fan of Electrostatics and Planers since. Some years later, because of a change in living spaces I had to revert to smaller, monitor style speakers. After moving back into a larger home with a decent sized listening room, I had a chance to pick up a pr. of the little Maggie 1.7s and like them allot. If I could find a pr. of used 3.7i within a reasonable driving distance of my area I’d pick them up, without worry of their efficiency. If my old ADCOM doesn’t do a good job at driving them, I should be able to find a fair buy on a used Bryston, Krell, Coda, etc that would.

To be fair, except for Spatial Audio (which I did like) I’ve not auditioned or entertained much, the idea of going with an efficient speaker - so my opinion of them may be a bit limited and irrelevant and my love for electrostatics and ribbons, a bit biased.....Jim