Using a proper power conditioner reduces the background noise level and improves the dynamics, besides protection from lightening and other hazards. One other thing that I did was lift the ground and do a separate star grounding that goes out of the house into the ground. This I do not recommend to all as it has its serious dangers, but made my system remarkably quiet. Having separate circuits can induce hum at times.
Having said that, subtle changes in sound with any change may or may not be for your liking as we all hear differently.
thanks,
Giri
Having said that, subtle changes in sound with any change may or may not be for your liking as we all hear differently.
thanks,
Giri