
Originally Posted by
MartinT
While fiddling with Marco's deck and Ortofon SUT (step-up transformer) on Saturday, I happened to touch one of the silver transformer housings and got hum. We realised that the SUT was not being earthed from the interconnect screens but was independently earthed via its earth wire. Connecting that to my phono amp's earth terminal made a substantial improvement to dynamics and lowering of the noise floor.
So tonight, while reconnecting my system, I earthed my Choir Audio SUT in the same way. I've just discovered an improvement in focus and a further lowering of noise floor!
The lesson is: even if you have no hum, your earthing arrangements may not be optimal. I star earth my turntable, arm and now SUT separately to the phono amp's earth terminal, which then goes back to mains earth. You might all want to check your earthing arrangements

That was one on the most surprising things I've ever heard in hifi. The improvement was like an upgrade of £100s.
There were two significant sound improvements while my house was being refurbed, we were still living in part of it.
I noticed a big improvement one evening - from the previous so a big difference.
I found the sparky and asked what he had done. Both times earth improvements.
Think there was a third where he changed one breaker for a larger more modern one.
You wonder what more can be done for just a few quid
TAD CD / DAC / Pre, Technics 1210, MCRU PSU, Mike New Bearing & Platter, Stillpoints LP1 weight, Speedy Steve Ebony armboard, Fidelity Research FR64FX arm, Ortofon SPU. Aurorasound VIDA Phono Pre Amp, TAD Power Amp, TAD E1 speakers. Coherent RTZ 3 Grounding box, Coherent grounding cables, Creaktiv racks. Coherent Mains Cables. SR Blue Fuse. Interconnects : Coherent and Yannis 223.5 Connect Litz. Coherent speaker cable. Audio Magic Transcendence Conditioner. Coherent mains socket. Mains Filters : , PS Audio Harvesters, Russ Andrews Purifiers, Tacima, Vertex. Black Ravioli and RDC supports. Electric Beach S1NX platforms for TAD CD and Technics. Ferrite chokes everywhere except the above. Ears, brain
Mike