The Bob Moog Foundation - Drawn on this day in 1966: the 904-B schematic. You hear a lot about the 904-A, the celebrated low-pass filter. But many forget – or don't know –
Of Responses & Resonance
Robert Moog's Ladder Filter Patent
Moog-type High-pass Ladder VCF | Electronic things… and stuff
Moog-type High-pass Ladder VCF | Electronic things… and stuff
Analyzing the Moog Filter - Technical Articles
The Classic Sound of the Moog Ladder Filter | Universal Audio
904B High Pass Filter - postmodular
Moog ladder HPF - MOD WIGGLER
Plugin Spotlight: Moog Multimode Filter Collection by UAD | Dubspot