Most coherent low volume speaker with very fast bass under 10k used?

I would like too add that I like wide dispersion speakers. Think ATC SCM50, with the coherence and speed of a quad 57, and dynamics of horns.

Well, i mention very fast Bass because this is the weak spot of all speakers. High inertia of the large bass driver or time smear with multiple small ones destroy coherence and introduce timing problems. 85db - where all frequencies start to appear even - is far too loud. I think there is also a market for excellent low level speakers that are optimized for 70-75db. If you play that speaker louder and bass and highs get too intense so you turn the level down again - well that can only be a good thing for our ears.