Multimode filter with VC resonance; THAT 2180-based
Multimode filter, 12dB/oct response.
VC frequency and resonance.
Clean sound and perfect self-oscillation tracking.
Bass boost switch adds basses at high resonance.
http://www.l-1.su/2180VCF.html
Available as an assembled Module and as a DIY project.
This Module is currently available.
$260