Awright...discoveries...
First, the cables sound much better in reverse direction as indicated by Rollo...dot at the load end/or against the direction of the name-tag.
Image was higher, soundstage was much improved, the 'muteness' was gone, volume level became normal...so much better with percussive instruments definition and 'snap'. I burned them in overnight in this reversed direction before coming to these improved impressions.
Exchanged PMs with Grover, and as per his request the cables will be returned to him for final tweaking before resuming tour.
THis is a darn good cable for the price. My current cable, Kaplan GS, is 4x the price of the Grover Zx...the GS had deeper/more dimensional soundstage, the SX had a slight more forward presentation in the midrange, which sort of made the front to back dimension of the soundstage seem shallower. A different presentation.
Its a big performer...and a bargain.
Looking forward to hearing the tweaked version.
Thanks Grover.
CES here I come.