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Dave Smith Instruments DSM01 Curtis Filter Eurorack Module

Modular Filter with the classic Dave Smith Sound


The Curtis filter offers the heart and soul of the classic Dave smith sound. If you want to create a modular synth that has some of the brash, saturated and powerful tonal characteristics found in all the great Dave Smith Synths.

Compact Eurorack

The DSM01 is designed in a compact, 8HP Eurorack format module, so you can easily and simply fit it into your modular system. Once hooked up, plug in your patch cables and take advantage of that signature sound in your setup. Taking it's name from the original filter chip designed by the late Doug Curtis, the DSM01 provides both a switchable 2- or 4-pole (-12dB or -24dB per octave) low-pass filter and a low-noise VCA with LED CV indicator.

Flexible Routing

The DSM01 has two separate outputs; one pre-amplifier and one post amplifier, giving you flexibility in your routing and to use the module in a variety of ways. In any modular system, you're looking for something both new and interesting, but it's also great when it gives you a whole host of new options for your setup. The DSM01 has both of those qualities and is a great addition to any modular synth.

DSM01 Specifications

  • 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
  • 1.59 W x 5.06 H (40.3 mm x 128.5 mm)
  • Width: 8 HP
  • Depth (measured from back of panel with power cable installed): 1.06 (27 mm)
  • Mounting screws
  • Ribbon cable for power connection
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