I saw this thread this morning and alerted Grover so that he could choose to respond himself (rather than me “letting any cats out of the bag”).
I have had and used 10-foot Grover SC bi-wire speaker cables since early 2008.
See my comments at
http://www.audionervosa.com/index.php?topic=1156.0 I sent those to Grover for upgrade in January and received new version Grover SC bi-wires
on February 10th of this year, so the new ones have been in use for 5 weeks or so.
The new version bi-wires outperform the previous version in my system
(which changed somewhat in late December).
Main system change is a custom dual ZapFilter mod to my Denon 3930 player by Matt Anker of sacdmods.com. (“DigiPete” over on Head-Fi sent his Denon 3930 to Matt for a single ZapFilter mod and within two weeks Matt purchased a stock machine to modify for his own personal use and it is still his reference digital player).
I had Matt install two separate ZapFilter analog output stages for the two-channel stereo circuit (which uses the two PCM 1792 current output DACs in parallel) and for the front left/right of the multi-channel circuit (as the stereo circuit can only output a “mix-down” of 5.1 material such as SACD/DVD-A). I also had Matt add balanced output XLRs for each of the ZapFilters.
This mod improved the Denon 3930 sonics considerably.
See
http://www.sacdmods.com/DVD3930.htm for Matt’s comments on the sound of the singly modded player (with which I completely concur) and see the very last section
DVD-3930CI Dual ZapFilter Modfor Matt’s description of my custom mod and pictures.
February 10th I also received two pairs new version Grover SC interconnects w/RCAs which had no “direction arrow” on the labels. My guess is that these ones have a different mix of silver and copper ribbons, as mentioned by Grover today.
Last week Grover shipped me two pairs even newer version Grover SC interconnects which I have not received but expect any day. I think these will be the Grover “SC.” (SC dot) which Grover mentioned today. After listening tests and once things stabilize, I may send all earlier version Grover SC ICs for upgrade.
I received one original version Grover power cord last year, which came with standard grade Marinco/Wattgate connectors and I immediately sent it back to Grover and ordered some cryoed Oyaide -004 terminations shipped directly to Grover to remake that cord and another one. Upon receiving the two upgraded Grover power cords, I used them in listening tests comparing with 2 Black Sand Violets Z1s with Oyaide -004s and 2 TelWire cords (which come with Oyaide -004s as standard) on my stock Denon 3930 and my Modwright SWL9.0 Signature tubed linestage. I preferred the TelWires power cords on both components. See post at
http://www.audiocircle.com/circles/index.php?topic=39143.20" Grover saw my comments and said he had an improved version power cord and I sent him the originals to swap my Oyaide -004s onto the newer version power cords. I received these on February 10 and from initial listening these sound closer to the TelWires than the original Grover version did.
I plan to perform a new round of detailed listening tests of the different power cords upon receipt and break-in of the latest Grover “SC.” interconnects.