Quad Voltage Controlled Filter
This 8HP Eurorack module has four separate voltage controlled cutoff filters. These are vactrol-based, totally analog filters. There is a knob and CV input for each one to adjust the cutoff frequency. When CV is used, the knob sets the maximum cutoff frequency. Super simple and sounds awesome!
https://www.mazzatron.com/product-page/quad-cutoff-eurorack-module
This Module is currently available.
$99