Depending on your budget Audio group Denmark Ansuz have excellent line conditioners Thst use bunches of Tesla coils and other technologies
my brother owns one and he has many $$ items they work well starting around $3k on up.
Puritan make a very good one for around $2500, I see people modding these though with Furutech Copper contacts , for even myself wrote to them telling them to use all Copper receptacles instead of much lower grade and conductivity Brass .