Free State FX Intros 5U Lopass Gate

Free State FX has introduced the FSFX 103: Lopass Gate, a new style 5U module, inspired by the classic Buchla Low Pass Gate design.

It is based on Buchla 292C schematic, with a unique resonance circuit, designed with the help of Phil Petschke of Megaohm.

The result expands upon the possibilities of the original Low Pass Gate by incorporating a new resonance/feedback circuit capable of self oscillation and waveshaping.


  • Vactec VTL5C3/2 Vactrol for classic sound and response
  • Can be used as a VCF, VCA, or both
  • FM Input with Inverting Level Control
  • Dotcom Power Header
  • All thru-hole PCB components (no SMD)
  • Shallow – module depth only 1.75″
  • 1/4″ Switchcraft Jacks”

Pricing and Availability

The FSFX 103: Lopass Gate is available now for US $220.

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