There's a lot of sonic territory to explore with the Roland System-500 521 dual VCF module for Eurorack. Based on the classic System-100M modular synth, the System-500 521 offers two great-sounding lowpass filters, with resonance that can reach self-oscillation.
-All-analog dual filter module for Eurorack
-Each filter offers 3 audio inputs and 3 CV inputs for control
-Smooth-sounding lowpass filters with resonance that can reach self-oscillation
-Switchable highpass filters with 2 cutoff frequency positions expand your creative options
-16hp wide, 58mm deep