Late to the game here, but I just built my own DIY version of this (neutral RCA to mains ground pin) and it does seem to lower my noise floor..
An interesting observation: I asked gutwire if I could connect their cable to an unused output jack. Their reply was, yes, no problem, connect it to any unused RCA jack. I tried connecting it to an output jack and was rewarded with a lovely, loud hum. When I connected it to an input jack, the hum disappeared and I was rewarded with a lower noise floor for vinyl listening.. Haven't tried digital yet.
It's truly crazy how there are no universal standards among home audio equipment. It really is an area where experimentation and curiosity can lead to improvement, but where everything is so outrageously system dependent. Just another reminder, to me, that many of the disagreements on here are more than likely due to this extreme variability.
And that's why I love DIY. I had all the parts I needed laying around, so this experiment cost me nothing..
An interesting observation: I asked gutwire if I could connect their cable to an unused output jack. Their reply was, yes, no problem, connect it to any unused RCA jack. I tried connecting it to an output jack and was rewarded with a lovely, loud hum. When I connected it to an input jack, the hum disappeared and I was rewarded with a lower noise floor for vinyl listening.. Haven't tried digital yet.
It's truly crazy how there are no universal standards among home audio equipment. It really is an area where experimentation and curiosity can lead to improvement, but where everything is so outrageously system dependent. Just another reminder, to me, that many of the disagreements on here are more than likely due to this extreme variability.
And that's why I love DIY. I had all the parts I needed laying around, so this experiment cost me nothing..