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Analog Specs
Doepfer1997MonoModular / Patch-Only$$Mid-Range($250–800)

Doepfer MS-404

Acid and bass producers wanting a genuine self-oscillating analog filter in a compact semi-modular format.

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Strengths

  • Self-oscillating analog filter gives it genuine acid-bassline character in the tradition of the TB-303, but as a real semi-modular synth
  • MIDI input built directly into a Eurorack-format semi-modular box was unusual for its era and made it easy to sequence from a DAW
  • Patch points expose real modular routing without requiring a full separate case and power supply

Trade-offs

  • Monophonic only, so it's a bass/lead specialist rather than a general-purpose instrument
  • Considerably more obscure than Doepfer's own A-100 system, making full documentation harder to find today

Full Specifications

Full technical specifications for the Doepfer MS-404
SpecificationValue
BrandDoepfer
ModelMS-404
Era1997
Typical Price TierMid-Range ($250–800)
Voice ArchitectureMonophonic
PolyphonyMonophonic
Oscillator TypeAnalog (2 VCOs)
FilterAnalog resonant low-pass (self-oscillating)
KeysNone (module/sequencer only)
Built-in SequencerNo
MIDI EquippedYes
Patching3.5mm patch cable matrix (semi-modular, Eurorack-compatible)

A relative used-market guide, not a live quote — real prices vary by condition, region, and timing. Check the Reverb/eBay links on any item for current listings.

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Match Score Explorer

Weight what matters to your workflow. Every deck is re-scored live against your priorities, benchmarked against the Doepfer MS-404.

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This deckDoepfer MS-404
Match52
Flexibility72
Portability62
Ease of Use42
Tonal Neutrality30

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