I highly recommend the latest white techflex Grover S ICs.
Mine took ~ 50 hours for complete burn-in and reached maybe 90% after about 20 hours.
I am using them throughout my entire system (see bottom of post):
Compared to earlier Grover S (black or white), I hear new level of previously masked or hidden detail in the music and greater frequency extension in both lows and highs, particularly in the highs. These are quieter (cleaner, clearer), more detailed, smoother, and more open.
Definitely now at "reference" level in my system to my ears.
The latest white Grover S are now in the "whole nother league."
(See posts on Audio Nervosa comparing earlier white Grover S to Stealth Indras and JPS Aluminatas, as well as to Straley Reality ICs, VenHaus Audio Pulsars, Speltz Anti-cables, etc.).
There is a 2nd "group buy" started for these current white Grover S interconnects on Audio Nervosa forum.
You may join Audio Nervosa and order through the 2nd group buy to get up to a 30% discount over the normal pricing of $150 for a one-meter pair with RCAs. Pricing for other lengths and terminations are already posted in the group buy section there.
I e-mailed to my friend George near Atlanta to alert him to get some of these. I then mailed him a pair of my white Grover S ICs to burn-in and audition.
Got em friday. I'm going to call you monday if thats ok,,first,,they are beautiful,,my ears are not as good as they used to be but,,,the grovers seem to be more refined,smoother,and the mids and highs are just simply amazing. I'm sold on them already. I'm going to get in on the group buy round two,,Thanks for helping me deplete my savings,,,you were right,,these cables are something else,,thanks again,,I forsee a big cable sale on Club Polk
Regards to all--george
front l/r: stock Denon 3910 > white Grover S ICs > Modwright SWL 9.0 Signature with Bendix 6900s and cryoed Philips metal base GZ34 NOS 1957 > white Grover S ICs > Odyssey Mono Extreme SE amps with Klaus's "special boards" > Grover S bi-wire speaker cables > Polk Audio SRS-2 speakers (with custom SDA cable made from Grover UR speaker cable)
center: stock Denon 3910 > white Grover S IC > Sunfire Symphonic Reference preamp > white Grover S IC > Odyssey HT-3 power amp with capacitance upgrades > Grover SR speaker cable > Polk Audio Csi-5 speaker
l/r surround: stock Denon 3910 > white Grover S ICs > PS Audio PCA-2 preamp > white Grover S ICs > Odyssey HT-3 power amp with capacitance upgrade > Grover UR speaker cables > Polk Audio Fxi-5 speakers