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Dave Smith DSM01 Curtis Filter Module

Curtis Filter Eurorack Synthesizer Module

Dave Smith DSM01

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  • Dave Smith DSM01
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Product Description for the Dave Smith DSM01 Curtis Filter Module

Big Sound Comes In Small Packages

Dave Smith's first-ever offering for modular synthesizer users is a big one—the DSM01 Curtis Filter, the very heart and soul of the Dave Smith sound. Featured in everything from Dave's vintage Sequential synths to his recent cutting-edge instruments such as the Prophet 12, the Curtis tone is brash, saturated, and powerful.

Plug It and Play It

The DSM01 is a compact, 8 HP Eurorack-format module. Plug it into your modular system and that classic Curtis sonic signature is instrantly within a patch chord's reach. The filter is a resonant low-pass design that can be switched between -12 dB and -24 dB operation and driven into self-oscillation in -24 dB mode. A Boost switch lets you overdrive the input stage for more aggressive coloration.

Integrated VCA

In addition to its Curtis filter, the DSM01 provides its own responsive, low-noise VCA with LED CV indicator. There are two separate outputs—one pre-amplifier and the other post-amplifier. This not only gives you added signal routing flexibility, but also frees your system's existing VCAs for other tasks.

Give Your Modular System the Edge

If you're a typical modular user, you're always on the lookout for new and interesting components to enhance your system. The DSM01 is an easy and affordable way to give your system a new sonic edge—with the filter that's brought some of the world's most in-demand synths their classic tone and vibe.


  • A genuine 2-/4-pole Curtis filter for your Eurorack format modular synth
  • Selectable -12/-24dB filter slope lets you dramatically alter your tone
  • Frequency, resonance, and VCA each include independent CV inputs
  • Boost function introduces harmonic distortion for aggressive coloration
  • Separate pre- and post-VCA outputs allow for a variety of wiring possibilities


  • 1 CV In - Frequency (3.5 mm jack) Range: 0 to 10V
  • 1 CV In - Resonance (3.5 mm jack) Range: 0 to 10V
  • 1 CV In - VCA (3.5 mm jack) Range: 0 to 10 V
  • 1 Audio In (3.5 mm jack) +/-5V or 10V p-p
  • 1 VCF Out - pre-VCA (3.5 mm jack)
  • 1 VCA Out - post-VCA (3.5 mm jack)
  • Self oscillation in -24 dB/octave mode, tracks at 1V/octave


  • Internal power connector (ribbon cable included)
  • Current draw: +12V @ 36mA, -12V @ 25mA

Physical Specs

  • 1.59" W x 5.06" H (40.3 mm x 128.5 mm)
  • Depth (measured from back of panel with power cable installed): 1.06" (27 mm)
  • Mounting screws included


Brand Dave Smith
Weight 0.4400
Dimensions (WxHxD) No

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