My system is dead quiet and excellent SQ. I tried grounding cable with RCA connector on several preamps and found sound is darken, high limited and not as airy. Similar results with RCA grounding pins. Like everything else, everything system dependent.
GutWire Ultimate Grounding Cable
With the recent reviews, and positive reports from a couple of members here, I decided to take the plunge and order one.
https://audiobacon.net/2017/12/09/gutwire-perfect-ultimate-ground-cables-review/
http://www.6moons.com/audioreviews2/gutwire/1.html
Like others I have been intrigued by the positive reviews for grounding blocks from various companies, but the prices are prohibitive. I decided to spend the extra $100 for the Ultimate over the Perfect as both reviews say it offers significant improvement. I am planning on plugging it into an unused RCA input on my Antique Sound Labs autoformer passive pre. I'll post updates after I get it, and have broken it in.
https://audiobacon.net/2017/12/09/gutwire-perfect-ultimate-ground-cables-review/
http://www.6moons.com/audioreviews2/gutwire/1.html
Like others I have been intrigued by the positive reviews for grounding blocks from various companies, but the prices are prohibitive. I decided to spend the extra $100 for the Ultimate over the Perfect as both reviews say it offers significant improvement. I am planning on plugging it into an unused RCA input on my Antique Sound Labs autoformer passive pre. I'll post updates after I get it, and have broken it in.