After placing my order for "upgrade" to Grover SX I asked Grover and he confirmed that he did have examples of his previous cable versions on hand. I discussed with Grover by phone and e-mail my impressions on previous Grover IC versions up through Grover "SC" and "SCdot" and even particularly highlighted what I felt was pretty much an overall consensus that the Grover (S) "graphites" had exhibited the most "edge" or "grain" of all his designs and that the Grover (S) white/white were perhaps liked the best (detailed yet balanced frequency-wise and with perhaps the least edge or grain).
Grover acknowledged that some iterations could have been sideways moves or even a step backwards in some areas.
Grover sent me 2 pr. Grover SX with non-teflon dielectric and aluminum incorporated for audition.
These were very good and for first time I felt this particular version of Grover SX were if anything a tad on the "musical" side of the detail vs. musicality "knife edge" and might could be further tweaked to regain a bit more detail and extension while still remaining sufficiently "musical." I conveyed my impressions to Grover.
On November 14 Grover e-mailed "...Sorry for the delay, I changed the Sx again so you'll be getting even better cables. ..."
On December 4, I finally received my order of 6 pairs 1-meter and 2.5 pairs 2-meter Grover SX ICs w/ RCAs. These are, as I asked for, an apparently "finalized" version with non-teflon dielectric and incorporating aluminum.
Grover's e-mail said "...these new cables are much more labor intensive. The good news is I don't plan any changes. "
These ICs were installed in my system and have been in use probably 6-8 hours per day since late on December 4.
I find these to be "neutral" in frequency balance (very well balanced top-to-bottom) and to convey more detail and to be slightly more extended in the treble and with great bass definition, while still remaining musical to my ears in my system.
My impression is these also provide a stronger signal but with no increase in noise level.
In combination with the Grover SX speaker cables (with non-teflon dielectric and aluminum incorporated), I find the current Grover SX ICs to provide an excellent balance of detail and musicality and to be an excellent value.