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TubeOhm SMR4P MULTI VCF back in stock: 15 modes, VC-Switching, Internal FM, VCA & more..

TubeOhm Matttech Modular 19.02.19

Super-excited to have some fully-assembled units of the TubeOhm SMR4P MULTI VCF back in stock – one of the most intriguing and unique designs we’ve seen in a while.

It is based on the SMR4mk.II filter circuit, and offers the 15 different filter modes of the 4-Pole MISSION VCF (both originally available for Mutable Instruments’ Shruthi Synthesizer)

It has the ability to switch filter modes under voltage control – along with a unique “internal FM” option which further adds to the available timbres by applying audio rate modulation to the cutoff point. This produces an alternate “dirtier” tone for each of the filter types.

We have tried this filter out in person, and can wholeheartedly recommend it – in fact,  Its basic sound is clean, clear and possesses a beautifully “liquidy” squelchy vibe – similar to the Doepfer a105 or Tiptop z2040 at times – but you’re not stuck with a single Lowpass mode. However, when you apply the internal FM it turns into a totally different beast, becoming a lot more aggressive and gnarly. In addition, when you take into account all the 15 modes it is hard to imagine a wider range of filtering in 10hp. Check the video below for examples!

Usually only available in (a rather complicated) kit form, these are lovingly assembled in Germany by the designer himself – Andre Laska 🙂



  • Multimode 4-pole Voltage Controlled Filter with self-oscillation
  • 15 filter types with voltage controlled switching & LED matrix display
  • Onboard VCA
  • Outputs for VCF direct and also via VCA
  • Internal FM feature
  • CV inputs for Resonance, VCA Gain, Cutoff & 1v/oct
  • 20 Hz – 22kHz (Res 24dB)
  • Max signal amp input 5V p
  • Modulation: ext. 0-10 v

TubeOhm SMR4P side 2