- (2012-06-13) electro harmonix bassballs by Don Felipe
- (2015-05-21) Electro Harmonix Russian Bass Balls (plus tremolo trick!) by LongFallBoots
- (2016-01-23) EHX Bassballs russian + Octave Multiplexer, jam for fun. by MSM Workshop
No forum threads about this effect yet.
- Electro-Harmonix Bass Balls - Twin Dynamic Filters for Bass Guitar
- Behringer VB1 Vintage Bass - Dual Dynamic Filter
- Eleca EBB-1 Bass Distortion - Twin Dynamic Filter (copy?)
- Eleca Best Bass
- Fuzzy Balls Envelope Filter (modified clone)
- Mark Hammer's Ultraballz (modified clone)
- Mooer Audio MFT1 Bass Sweeper
- Shunin BassBalls
Here's some code to post a link with image on forums, eBay, websites,...