What is your take on high efficient speakers vs. low efficient speakers?

@boomerbillone i think of efficiency in a different way. Less efficient speakers - more filtering in the design and less music. In addition, the high power amp is another problem - more filtering,  more distortion and less music as well.  I'm sure your speakers sound great, but they are different. 

High efficiency horns need very little energy to get going so they basically make more sound with less driver effort...a good thing. I've heard some great sounding systems with lower efficiency speakers, but for me horns are magic, and I'm hooked on lower powered class A amps so it works for me.

It's rather like comparing cars, once accompanied a friend with his 5 litre V8 to a track day. He was whopped all day by a couple of 1.8 litre Lotus, on a straight track the Lotus loses on proper race track there the V8 loses. Which experience do you want?

No need to agonise like this.  It is all personal choice.  Don't worry about efficiency.  Get the speakers you like.

If they are low efficiency then you will listen at lower volume or buy bigger amps.

Simple as that.

Klipschorns & properly matched, flea watt tube amplification in a room designed specifically for them…vs….Apogee Scintillas with no compromise amplification in a tailor made listening environment

all source components identical

How I would love to spend a week comparing those high vs low efficiency systems!