First of all...
the effect of filters and power-conditioners strongly depends on
your "current" situation at home.
I moved several times to different areas and the effect never
was the same.
So I would recommend to make tests at home with loaned
equipment.
My recommendation is the NuPrime Pure AC-4.
https://nuprimeaudio.com/product/pure-ac4/?v=b0c4bc877c29
I never had such positive cleaning effects for less than 5000 bucks.
the effect of filters and power-conditioners strongly depends on
your "current" situation at home.
I moved several times to different areas and the effect never
was the same.
So I would recommend to make tests at home with loaned
equipment.
My recommendation is the NuPrime Pure AC-4.
https://nuprimeaudio.com/product/pure-ac4/?v=b0c4bc877c29
I never had such positive cleaning effects for less than 5000 bucks.