Budp 2/25/10: if you have poured ground planes in all of your equipment in the amplification chain, or you have a fully differential amplifier, without direct reference to true ground, they will not provide you with any benefit.Ozzy, aren't your Pass Labs preamp and amp fully differential?
Ozzy 4/28/10: Well I finally had one of the Ground Controls for about a week.
I will admit that these little things dont look like much but they do provide a marked sound quality, improvemnent in my system.
Music seems to be much more relaxed or natural and the soundstage is deeper and wider. Vocals are very nice and defined closer to the real thing.
Regards,
-- Al