Cwejman S1 synthesizer

$7,523.16 Price Tier: High-end

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Cwejman S1 MK2

$7,523.16

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Page last updated Jul 04, 2026

Pricing and availability

We compare 600+ stores and found this item at 1 store. Prices updated July 4, 2026.

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Price

$7,523.16 1 available Used

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Average Price: $7,523

High-end/Boutique

$149

$350+

Price Tier

In the Modular Synthesizers category, Cwejman S1 synthesizer is priced in the High-end/Boutique range. This premium gear is built to very high standards and offers premium features.

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Standard

High-end

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Description

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The Cwejman S1 synthesizer is a powerhouse for any musician delving into the world of modular synthesis. This semi-modular analog synthesizer combines the flexibility of modular systems with the immediacy and convenience of a standalone unit. Known for its distinctive sound-shaping capabilities, the S1 offers a robust platform for both live performance and studio production.

Equipped with three voltage-controlled oscillators, this synthesizer provides a wide range of tonal possibilities. Each oscillator offers multiple waveforms and modulation options, allowing for intricate sound design. The multi-mode filter adds a layer of precision, offering low-pass, band-pass, and high-pass filtering with impeccable clarity. The synthesis architecture is complemented by a noise generator, ring modulator, and external input, making it a versatile choice for any audio enthusiast.

The intuitive interface of the Cwejman S1 makes it accessible to both newcomers and seasoned synth users. Patch points are clearly laid out, facilitating complex routing and experimentation without the need for external modules. The built-in MIDI interface ensures seamless integration with modern digital setups, while the sturdy build quality promises reliability over extended use.

Key Features:

Semi-modular design with standalone capabilities
Three voltage-controlled oscillators with multiple waveforms
Multi-mode filter with low-pass, band-pass, and high-pass options
Intuitive interface with comprehensive patch points
Built-in MIDI interface for easy digital integration
Noise generator and ring modulator for enhanced sound design
External input for additional audio processing

Videos

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kapillarkraft

Cwejman S1 standalone series #1 -selfplaying ambient patch-

kapillarkraft

Cwejman S1 Synthesizer 2005 Pt 1/2

Moogulator

Cwejman S1 Semi-Modular: Musikmesse 2007 Video

gearwire

Reviews

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Owner Insights

We analyzed real musician discussions from forums and Reddit to find what players love, question, and tweak about Cwejman S1 synthesizer.

Features and functionality

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The S1 Mk2's CV control of individual envelope parameters is rare and allows for unique modulation possibilities, enhancing sound design versatility.
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The S1's combination of 3 VCOs, dual multi-filters, and various waveforms is cited as a standout feature that sets it apart from simpler models like the RSF Kobol.
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The multimode second filter on the S1 offers numerous routing possibilities, enhancing its versatility in sound design.
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The SM-1 includes a saturation button that the S1 lacks, potentially contributing to its distinct sonic character.
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The S1 has one more oscillator but one less LFO compared to the SM-1, influencing modulation capabilities.
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Comparisons

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The Korg ARP 2600/2600m and Korg MS-20/MS-20m are noted as similar in form and function, but with different modular capabilities.
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RSF Kobol Expanders are mentioned as the closest vintage gear to the S1 MK2 in terms of VC envelopes and resonance CV, though still distinct.
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The S1 includes an additional oscillator compared to the SM-1, providing broader sonic capabilities.
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Build quality

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Some users report that the MS-20 mini's parts quality is suspect, with a tendency for increased noise compared to full-sized models, though durability remains high with careful use.
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Use cases and applications

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The desktop format of the SM-1 may lead to sync challenges, whereas the S1's design is more straightforward for integrating into diverse setups.
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User experience

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Long-term S1 users appreciate the dual filter design for its extensive routing options, indicating satisfaction with its sound-shaping capabilities.
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Owners find the S1's overdrive feature to be the least useful, indicating a preference for other sound shaping options.
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Value and pricing

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An owner considers the Cwejman S1 a timeless piece worth investing in, especially for those focused on rack-mounted systems.
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Setup and maintenance

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Tuning and scaling the S1 is nearly impossible, suggesting a potential challenge for precise pitch control.
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Users express concern over the difficulty of servicing the S1 due to its complex design and lack of accessible service options.
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