G-Storm Electro XaVCF Eurorack OB-Xa Filter Adaptation

The XaVCF is a faithful adaptation of the OB-Xa filter in Eurorack with added features.  

As with the original, the XaVCF has two filter circuits to choose from! The heart of both designs having each its own Alfa reissue AS3320 chip. The XaVCF has the original Modes: a 4-Pole standard Lowpass circuit, and a 2-Pole Lowpass derived from a State-Variable circuit. Additionally there are 1-Pole Bandpass and Lowpass modes not available on the original!

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 alot of low end at higher resonance.

The XaVCF is drenched in that fat and creamy wall of sound you’ll not soon forget. Are you ready for the Xa experience?

FEATURES

Two selectable filter circuit configuration Types: Type I-SVF 2-Pole Lowpass, and Type II 4-Pole Lowpass.

Additional Modes: Type I 1-PoleBandpass, 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.

INCLUDED | a 10-pin to 16-pin Eurorack ribbon connector.

NOT INCLUDED | M2.5 or M3 (Doepfer standard) Phillips-head basic zinc rack screws are only provided on special request. Why do I do this? To cut down on rack screws that are wasted in the universe. What's it gotta be? Thousands? Hundreds of thousands? Unused, unwanted. You know the ones I mean | wrong size, wrong color, cheap junk tin, top slot-stripping, rack-rashers, wrong thread count, wrong length, wrong political party, etc. I use thumb screws in 2 sizes myself. So yeah, if you request some M3's from me, I will probably pull the ones from other companies boxes in my closet. You're welcome :D

Specifications:

• Inputs - 2 Audio Inputs, 3 CV Inputs
• Outputs - 1 Mono Output
• Current – 20mA +12V, 27mA -12V, 0mA +5V (not used)
• Depth - 26mm
• Width - 12HP, 60.5mm

“Absolutely gorgeous-sounding filter, well-packaged and lovely panel. Thanks for making my dream of having an Oberheim filter come true. Very happy to have this in my system. “ - H.C., Canada 

“Love it! I've been wanting that OB sound for awhile and this sounds fantastic! This has lots of filter options, and the standard G-Storm filter input layout, with multiple audio, and cv inputs, all at the bottom is great! Thank you again!” – J.M., WA

“Wow sir. I am truly flabbergasted. This filter is so versatile. After you wrap your head around it, it has a lot of great sweet spots. Thanks man. It's truly beautiful.” – S.H., MO

“He really did it! This is the place to get that Obie fizz!”- N.J., MD

“Amazing filter! Beautifully evokes the unique timbres of the OB-Xa! Well done, G-Storm!” –Steven, OR

“Super dope Filter sir! Will likely come back for more” - DH

“Amazing filter,after first hour of play I probably need second one :D” -PO

“XaVCF is literally the best filter I've ever heard” - Nevin N.

“Excellent Sounding filter, going have a lot of fun with this, love that the Resonance is also CVable.” –Mike C.

“you really nailed that oberheim sound, super happy with em.” -Rene