i have filters with like 5 things plugged in, they do all right but i can still get pops from switches, so a filtyer for each socket seems logical. I luckily dont suffer from hums so much exept for comp monitor vs guitar. A lot of my stuff is digital and i though if there was a way to guild a filter as i buy gear, it would be a good idea. My computer and motu 2408 used to be happy but now the when the graphics move it makes the sound fuzz, i dont expect a conditioner to clear it up but if it keeps pops and spikes from getting to my expensive sensitive gear that must surely be a good thing.