Amazon.com: Harrison Labs FMOD Inline Rumble Subsonic Filter Crossover Pr 30Hz High Pass RCA : Electronics
High Pass Filter Circuit | Rumble Filter - Engineering Projects
Rumble/subsonic-filter
ART Precision Phono Preamp with Switchable Low Cut Rumble Filter | Reverb
Praat Vocal Toolkit: Rumble filter (high-pass)
The Art of electronics - exercises - Additional exercise 3 of Chapter 1. Design a "rumble filter" for audio. It should pass frequencies greater then 20 Hz (set the "-3 dB" point
Scratch And Rumble Filter Circuit
Subsonic / Rumble Filter for Phono preamps and Sub-Woofers