Impressive
it is possible to over engineer a solution - fear of missing out is a beast that sometimes must be quelled 
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Yes… Still, for the possible amusement of anyone reading my post that joma was replying to, I’m just gonna keep the line that I was serious.
Okay… Half.
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An update on my September 9 post.
We’ve now had some significant rain followed by several weeks with almost no rain. The improvements in sound quality I noticed have remained unchanged through this period, as far as I can tell. The large changes in sound quality I had before doing this work are no longer evident so I’d recommend the approach I took (£8 + 1 day labour).
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vee, since you have a VERY gargantuan grounding system, and yes a very low grounding impedance - how much of an improvement has it brought to your audio system’s performance? Since we’re talking external grounding here, as in basically what would be considered safety ground, I’m wondering how much it can have to do with component performance and not just surplus safety (which is great in itself)
I have understood that without a balanced mains installation a la Equitech, the ground can easily be contaminated and leak noise back into equipment - is this really mitigated by having lower and lower grounding impedance by traditional means as in would this contamination be directed outside better or is the phenomenon actually local in the circuit of the equipment? I don’t understand grounding well enough to deduce, would like to hear what you’ve heard. From your speakers.
Of course, if you have your chassii RF grounded by specialized means into your low impedance safety ground, there would be great benefit no doubt. This much I understand. Do you have such installation? If you don’t, do attain it - Russ Andrews has a great solution.