Have you tried moving them out further from the back wall?

Yes, but (1) I noticed no improvement in sound, and (2) they intrude too
much into the listening room, which is also a "family room".


That surprises me. Small position changes make noticable differnces with my
CLSs.



Do you have any absorbtion or diffusion on the wall behind them?

No. Just wires. :-)

I don't have a "dedicated listening room", or I might experiment with such
things.

A 1.2 million dollar house and the stereo has to share the room??? Have you
thought about an addition to the house?


BTW, I understand you also have Martin Logans and ARC tube amps. Good
taste, matey. :-)

Thank you. It is a nice combo. Ever tried the AtmaSphere amps? I here they mate
well with the Soundlab full range electrostats. I am leaning towards Soundlab
as a future upgrade.