Filter Modulation FZ-85 (F. Zappa Filter Modulation) – Performance Guitar
Amazon.com: MOOER Envelope Analog Filter Dynamic Auto Wah Pedal, Exaggerated slap back funk, Subtle sultry abience, Static frequency filter effects for Guitar and Bass : Musical Instruments
Guitar Pedal X - GPX Blog - Old Blood Noise Endeavors's ingenious Float Dual Moving Parallel Stereo Filter takes the Filter Pedal Format to new heights
MXR M82 Bass Envelope Filter Effects Pedal | Guitar Center
Electro-Harmonix Blurst Modulated Filter Pedal for Guitars
Amazon.com: Fender Pour Over Envelope Filter Pedal : Musical Instruments
Low Pass Filter | Broughton Audio
Used Pigtronix Resotron Filter Effects Pedal Level 1 - Used, Like New - Walmart.com
Vena Cava Filter – Sound Shoppe nyc
Vocawah- Vowel Shift Filter- Guitar Effects by Subdecay
Death by Audio Evil Filter - Fuzz Filter – Thomann United States
Guitar Pedal X - GPX Blog - Preferred Filter Pedal Selection - at the key practical enclosure sizes