Some phono preamps have them built in. I am running a Sim Audio LP 5.3. The filter is engaged with a jumper.
Anyone wish they had a rumble subsonic filter?
I sort of do. I see my woofers moving due to ultra low frequency signal when I play certain LPs. Doesn't affect the sound, but I don't like it. Anyone have a solution for rumble, since modern preamps no longer seem to have subsonic filters? Scoutmaster on a Gingko Cloud 10 on a solid rack on a cement floor, is what I have.