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Singular Audio filterdrve 500 Series Filter Module - Mono

Mono 500 series filter module based off of the Korg MS-20 with additional features including overdrive, envelope follower modulation, very low noise, bypass, and balanced I/O

MFR# filterdrve mono (500 module)

Product Description

The Singular Audio filterdrve is an adaptation of the famous Korg MS-20 analog filter for the 500 series format. This is the mono version. The filterdrve has everything you want in a 500 series filter, such as balanced I/O, low noise, great headroom, etc. The flilterdrve also includes overdrive, audio feedback into the cutoff control and a controllable gain structure.

The real killer is that this filter, coupled with the drive and resonance, really screams. Hence, the name: filterdrve.

Low noise NE5532 opamps are used for great noise performance, while retaining the squelching sounds of the original. Self-oscillation can be attained with the peak control at maximum. The filter can be switched from low to high-pass operation. The bypass switching is done with hardware relays, for full bypass transparency.

The filterdrve runs on a 16V bipolar power supply, which allows for a lot of headroom. The drive control reduces the headroom, for overdriven sounds. Noise is much lower than the original MS-20 filter.

The filterdrve has alpha metal pots (knobs), an anodized black aluminum faceplate which is laser engraved, and good quality switches.


  • Very low noise, much lower than the original MS-20 filter
  • Singular controls for stereo operation
  • Low and high pass operation
  • Feedback control, which routes the audio to the cutoff Control for complex waveshaping
  • 35 dB of gain to push the filter into overdrive
  • Relay switching true bypass
  • Balanced input and output
  • Hand-built, calibrated and tested in Amsterdam

Product Specifications

Condition New
Channels Single-Channel
Chassis Module
Module Type 500 Series
Module Slot Count 1 Slot

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