I’ve NEVER had noise that wasn’t fixable. It’s usually routing.
Cables too close to each other.
PC are a big source of noise to close to IC, ground loops,
and NOT sharing a common power outlet.
I add a maintainer, cleaner, for just that.
Maintain 120 and clean it up a bit.
HF issues for me, with dirty VAC.. Ear bleeding, BOIL..
I fix the noise first WITHOUT a conditioner attached.
My 2 pennies...
Regards
Cables too close to each other.
PC are a big source of noise to close to IC, ground loops,
and NOT sharing a common power outlet.
I add a maintainer, cleaner, for just that.
Maintain 120 and clean it up a bit.
HF issues for me, with dirty VAC.. Ear bleeding, BOIL..
I fix the noise first WITHOUT a conditioner attached.
My 2 pennies...
Regards