G-Storm Electro XaVCF, Famous Analog Oberheim OB-Xa Filter Recreated In Eurorack

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G-Storm Electro XaVCF is a faithful analog adaption of the famous Oberheim OB-Xa filter in Eurorack with additional features like a new 1-pole bandpass.

Recreating old synths in Eurorack not only makes Behringer but also G-Storm Electro. The latest module is a recreation of the Oberheim filter. The XaVCF features two filter circuits to choose from based on Alpha AS3320 chips. Like the original, it has the original modes (4-pole lowpass circuit, 2-pole lowpass derived from a state-variable circuit) but also a new 1-pole bandpass and lowpass modes not available on the original OB-Xa from Oberheim

Both filter circuits on the XaVCF not only have musical self-oscillating resonance w/ CV control, but the frequency cutoff can be tracked V/Oct using the CV2 input jack. In this way the XaVCF can be used as a sine wave oscillator. Unlike some older classic filter designs, the XaVCF retains a lot of low end at a higher resonance. Further, the developers say: “the XaVCF is drenched in that fat and creamy wall of sound you’ll not soon forget”. Sounds very tempting to have such a well-known filter as a Eurorack module

G-Storm Electro XaVCF


  • Two selectable filter circuit configuration Types: Type I-SVF 2-Pole Lowpass, and Type II 4-Pole Lowpass.
  • Additional Modes: Type I 1-Pole Bandpass, Type II 1-Pole Lowpass
  • Two voltage-controlled input jacks for Frequency CUTOFF w/ signal attenuators. CV1 is an extended range input capable of providing some boost to weaker control signals. The CV2 input will track V/Oct when its pot is fully CW.
  • A voltage-controlled input jack for RESONANCE w/ a signal attenuator CV3.
  • Two audio signal input jacks w/ individual attenuators. Above midpoint, these inputs can overdrive the filter from most Eurorack oscillators and audio sources. This is especially useful in Bandpass Mode to compensate its weaker audio output signal.

G-Storm Electro XaVCF will be available in late February 2020. Price TBA but estimated 188€

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