Does anyone sell a highly adjustable rumble filter? I've found a few online but they don't seem to offer the amount of flexibility I'm looking for. Is there anything out there that has several settings between ~10hz to ~20hz?
IIRC, the Rane PE-17 has an adjustable subsonic filter. The SVS01 has an adjustable one, but only three settings - 15, 20, and 25 hz. The SVS01 is no longer in production. Find the thread about the ART cleanbox if you want to DIY.