Loudness or high sensitive speakers?

I can only offer what I experienced first hand.   I had a large pair of Usher floor standers and even with beefy, mono block amps the speakers needed to played at moderate volume to sound full and have proper bass.   I now have Tekton Lore speakers that are efficient powered by a Rega integrated amp.   Difference is these speakers produce full sound, good bass even at low volume.   Being in my 50s my hearing is not what it use to be and I try to avoid moderate to loud music to avoid ringing in my ears.

+1 @mceljo 

his comments have it covered

I’ve read, at many places, that high sensitive speakers will sound more ”full” at low volumes than other speakers. I assumed it was so. Even pdspeci experiences this.

But if high sensitive speakers are not the solution and the almost extinct loudness button is what to do then?

I don’t understand why ”audiophiles” has cursed the wonderful loudness button that almost every receiver had in the 70s and 80s.

Would it be possible to buy an old amplifier/receiver, take out the loudness ”part” and install it in a modern amplifier?