Why bother to listen to a "system" at 70db, try a clock radio. I listen to music at the volume as recorded and meant to be heard.
When Vladimir Ashkenazy made a recording of Beethoven's piano sonata No. 28 in 1977 on a Steinway D, that is what I want to hear 45 years later in my room. Complete with his musical intent and it's necessary dynamics.
Ambitious audio is a manner of having a different but equal experience to hearing music in the flesh.