Thanks, David. The information that you and others have provided in your thread has gone a long way to helping me better understand and optimize these wonderful speakers.
Of late, I've been auditioning cables. I've been comparing Synergistic Foundation cables against their higher-priced stable mates Atmosphere X and against the hodge podge of my existing cables (Teresonic, Dueland and Teo Audio GC). I started with the Foundation replacing my Dueland speaker cables and was startled by how much better they were. In fact, it prompted one of those classic moments where my wife came in and said, "You just changed something." The Dueland cables sounded vintage, rolling off highs and smoothing transients, very pleasant, but the Nenuphars don't need that tonic. The Foundation cables brought out their best, even to a higher degree I thought than the Atmosphere X Excite speaker cables at more than four times the price. Interestingly the X Excite cables exhibited some of the Dueland characteristics, being smoother and mellower. (An added plus to the Foundation speaker cables, for those with white Nenuphars like myself, is they come in white!)
The Foundation speaker cables made the most impactful difference, but the interconnects reinforced their benefits in audible ways. I'm now auditioning the Atmosphere X USB cable against the Atmosphere X Reference USB.
The homebound joys of landscaping and falling into the Nenuphar's musical spell are helping to keep me sane in these harrowing times.