Recommendations for speakers that sound great at lower volume levels.

Doesn’t exist!    Have a read up on Fletcher Munson Curve.
https://en.wikipedia.org/wiki/Equal-loudness_contour


Some will tell you XYZ speaker does it.  In my experience those guys seem to enjoy music with zero bass or dynamics.  I can’t.

My only advice for those late night listening sessions is either get yourself as near to the speakers as possible for intimate listening.
Or get yourself some decent headphones.

Biamp these speakers. Perhaps a ss amp for the woofers. They will come alive at low levels. 

As someone Else wrote. You need a amplifier that can deliver enough curent when needed and minimum 50 Watt.
I drove mine with Maek Levinson 383 integrated and they sounded superb. 

I upgrade to Quad ELS 2813 and that combo is not something i have regeret yet😉

Regards

Loudness controls are an interesting topic.
They have been universally denigrated by audiophiles.

But it is true human hearing has less acuity at frequency extremes - demonstrated by the fact most of us can hear nothing at all above 25kHz or below 12kHz.

But that is how all of us hear everything from birth to death.  So do we benefit from changing that pattern for listening to music?  An obvious response is that the hard of hearing benefit from hearing aids.  However this is not a reasonable comparison with those of us with normal hearing.

A mid-point perhaps is those who are older and suffer from natural detrioration of HF range and intensity.  There may be benefit in increasing the intensity of the HF signal.  This was achieved by the treble control, which with its LF parner has been out of fashion many years now.