Tic; several years ago I was auditioning ICs and speaker cables from The Cable Co., and they sent me Luminesence, Kaleidoscope, and Looking Glass ICs to try. At the time, I had a Sonic Frontiers Line SFL 1 pre-amp (single tube hybrid), and a McCormack DNA-1Dlx SS amp, w/ Vand. 2Ce spkrs.
In a nutshell, w/ the Looking Glass ICs from pre to amp, music was too bright and analytical for my taste, and from DAC to pre I much preferred the Luminesence, w/ the Kaleidoscope from pre to amp. The effect was much like the difference between the Syn Res Sig. #2, and Sig. #3 spkr cables.
I like SR ICs though and now use Lum. + Kal. Phase 2 Active Shieled w/ SF Line2 SE pre and McCormack DNA-0.5 Gold Rev., and Vand 5 spkrs. Cheers. Craig