--- title: "Weston Precision Audio: M3S Mini Stereo Mixer | Takazudo Modular" url: "https://takazudomodular.com/en/products/m3s-intro/" language: en description: "An introduction to the Weston Precision Audio M3S Mini Stereo Mixer. A compact 3-channel stereo mixer packed into just 6HP. Features configurable AC/DC coupling and linear/log potentiometer response. Shallow 25mm depth design optimized for compact performance cases." alternate_ja: "https://takazudomodular.com/products/m3s-intro/" source: "Takazudo Modular" --- ![Weston Precision Audio: M3S Mini Stereo Mixer](https://imgs.takazudomodular.com/images/p/weston-m3s-main-1__og/revisions/production/r1-9cc88c140d4534845f4514fd096a3540dad90a4fda3bdc1441e3beda8bf43645/1200w.webp) # Weston Precision Audio: M3S Mini Stereo Mixer Author: Takazudo | Published: 2026/03/01 - [# Weston Precision Audio](https://takazudomodular.com/en/tags/weston/) - [# Modular Synthesizer](https://takazudomodular.com/en/tags/modular/) - [# Mixer](https://takazudomodular.com/en/tags/mixer/) This is an introduction and overview of the **M3S Mini Stereo Mixer** by Weston Precision Audio, available at Takazudo Modular. The M3S is a compact utility module that packs a 3-channel stereo (or dual mono) mixer into just 6HP. With its low-noise design, it excels at simplifying cable routing and building complex stereo patches. Its shallow 25mm depth fits even the shallowest Eurorack cases. This product is available for purchase below. [![Weston Precision Audio: M3S Mini Stereo Mixer](https://imgs.takazudomodular.com/images/p/weston-m3s-0-front__og/revisions/production/r1-8a2a56f438b9d5ec13ef88206b344aefc2980667d9b5f1602d0e2db9959ed00b/2000w.webp) Weston Precision Audio: M3S Mini Stereo Mixer 19,800 yen (tax & shipping included)](https://jp.mercari.com/shops/product/2JP8EJTLuAc6AZPNYoAUN5) - [Buy this item via Buyee (International shipping)](https://buyee.jp/mercari/item/2JP8EJTLuAc6AZPNYoAUN5) ## Manuals and Guides Takazudo Modular publishes manuals and guide articles for this product. Please see below. - [M3S: ManualJapanese translation included](https://takazudomodular.com/manuals/weston-m3s/) ## 3-Channel Stereo Mixer The M3S features three stereo input channels (3 Left / 3 Right), each with an attenuator control providing up to unity gain. Input signals are summed and output through the Left and Right outputs. High input impedance (100kΩ) and low-noise audio-grade operational amplifiers ensure clean signal processing. ## Input Normal A convenient feature of the M3S is its input normalling: when no jack is plugged into a Right input, the signal from the corresponding Left input is automatically routed to the Right side as well. This means you can mix 1 to 3 mono signals by patching only the Left inputs and still get stereo output. ## AC/DC Coupling Rear jumpers (MK1) or DIP switches (MK2) allow you to switch the coupling mode of the Left and Right buses. - **AC Coupling**: Suited for audio signal mixing. Removes DC offset - **DC Coupling**: Supports CV signal mixing. Passes DC content through unchanged ## Linear/Log Response (MK2) MK2 units (serial numbers above 10020; MK1 covers units up to 10020) allow switching each channel's potentiometer response between linear and logarithmic. Log response is typically preferred for audio applications, while linear response suits CV applications. ## My Impressions These days, more and more modules are feature-rich and support stereo. When you set out to get a stereo mixer in that context, the options tend to be overly elaborate. The M3S, however, is extremely compact. It's incredibly handy for summing stereo effect returns, mixing multiple mono sources into a stereo field, and generally tidying up your patches. The 6HP footprint and 25mm shallow depth make it a valuable addition to portable cases. Thanks to the input normal feature, it's equally convenient for mixing mono signals. With AC/DC coupling support, it works not only as an audio mixer but also for CV signal mixing. It's a simple module, but one that expands your patching possibilities. ## Related Takazudo Modular Products [SV1 Dual / Stereo Voltage Controlled Amplifier Dual VCA with both a vintage BJT circuit and a clean high-precision chip circuit on each channel. Packs zero-cross click suppression, stereo link, and an overdrive switch into 12HP. ![Weston Precision Audio: SV1](https://imgs.takazudomodular.com/images/p/weston-sv1-main-1__og/revisions/production/r1-89da9d9bf93754f98ef640ee592061d7c332fbec76a9c1d2eafcabb929adee84/2000w.webp) 37,800 yen (tax & shipping included)](https://takazudomodular.com/en/products/sv1-intro/) [ADDAC713 Stereo Discrete Mixer Stereo discrete mixer. 3 stereo + 1 mono inputs with pan and gain controls. Design allows adding distortion for sonic character. ![ADDAC System: ADDAC713](https://imgs.takazudomodular.com/images/p/addac713-0-front__og/revisions/production/r1-d890c1920ad9fc6d42310f4aa41482dc5aa86bceedbea5577e728bb6481d8737/2000w.webp) 38,800 yen (tax & shipping included)](https://takazudomodular.com/en/products/addac713-stereo-mixer-intro/) [ADDAC802 VCA Quintet Module integrating 5-channel VCA and mixer. Each channel features linear/log switching, solo/mix/mute switching, and individual outputs. ![ADDAC System: ADDAC802](https://imgs.takazudomodular.com/images/p/addac802-product-img-1__og/revisions/production/r1-2076cb748a9786d9b97d7d0345db2285bd1d980d0fd79be2456f9ee0289ae793/2000w.webp) 59,800 yen (tax & shipping included)](https://takazudomodular.com/en/products/addac802-vca-quintet-intro/) [AI018 Stereo Matrix Mixer (Aluminium) 4-in × 4-out stereo matrix mixer. Route any stereo input pair to any stereo output. Ideal for effect sends and complex signal routing. Aluminium panel version. ![AI Synthesis: AI018 Stereo Matrix Mixer (Aluminium)](https://imgs.takazudomodular.com/images/p/s-matrix-built-alumi-front__og/revisions/production/r1-a5f1af4977c4b2261db2fe9e153df8ce6349fbd51632f12b9dd22beed0d8b2d4/2000w.webp) 47,800 yen (tax & shipping included)](https://takazudomodular.com/en/products/ai-smatrix-intro/) [AI022 Harmonic Mixer (Aluminium Panel) CP3-style mixer with discrete circuitry. Increasing gain adds harmonics and analog warmth. Further gain produces distortion and phase changes, forming new waveforms. Aluminium panel version. ![AI Synthesis: AI022 Harmonic Mixer (Aluminium Panel)](https://imgs.takazudomodular.com/images/p/harmo-mix-white-0-front__og/revisions/production/r1-57cd5a5b50d4b20206cd0a8dc5150eca8487b62469d62bdade8055f8197528c0/1944w.webp) 16,800 yen (tax & shipping included)](https://takazudomodular.com/en/products/ai-harmo-intro/) [AI106 West Coast Mixer (Aluminium) Discrete mixer inspired by vintage 1960s–1970s West Coast synthesizer circuits. Increasing gain adds harmonics and analog warmth. Aluminium panel version. ![AI Synthesis: AI106 West Coast Mixer (Aluminium)](https://imgs.takazudomodular.com/images/p/west-white-0-front__og/revisions/production/r1-326d028267762931a5f649a714ff2babcaab1b88eee32ee05a49ffce21d939ea/1952w.webp) 16,800 yen (tax & shipping included)](https://takazudomodular.com/en/products/ai-west-intro/) [5MX Mixer A 4HP 5-channel passive mixer with per-channel attenuators. Accepts either mono or TRS stereo inputs, and a pair of LEDs inside the panel indicates left/right output levels. ![NoisyFruitsLab: 5MX Mixer](https://imgs.takazudomodular.com/images/p/noisy-5mx-mixer-0-front__og/revisions/production/r1-c365bf32c3b5d48116bdf60f154d4cdda64679c2f0ebca3cfb4673a72d032afc/2000w.webp) SOLD 18,000 yen (tax & shipping included)](https://takazudomodular.com/en/products/5mx-mixer-intro/) ## Specifications - Width: 6HP - Depth: 25mm - Power consumption: +12V: 26mA / -12V: 26mA - Output impedance: 270Ω - Input impedance: 100kΩ - Power connection: 10-pin Eurorack connector ## Included Items - Power ribbon cable - Screws --- About the Brand ## About Weston Precision Audio Weston Precision Audio is a modular synthesizer maker based in North Carolina, USA. We started carrying Weston Precision Audio after the founder, Devin, reached out to us by email about distribution. When the modules actually arrived, we still remember being struck by how beautifully made every single one was. His modules show a real commitment to keeping that hands-on analog feel intact, and once you pick one up, the care he puts into materials and components becomes obvious — that is something we can promise. - [Weston Precision Audio Website](https://www.westonaudio.com/) - [Instagram: westonaudio](https://www.instagram.com/westonaudio/) - [YouTube: Weston Precision Audio](https://www.youtube.com/@westonprecisionaudio) ![Logo: 電氣美術研究會](https://imgs.takazudomodular.com/images/p/denbi/revisions/production/r1-c35cb4eaf5f608733e69add54a5d951fcd8e67a5b52edf89e605c75dd0a0fd42/820w.webp) ## Bonus: Modular Accessory Set by 電氣美術研究會 (Denki Bijutsu Kenkyukai) Included In the hope that more people will get hands-on with modular synths, we have teamed up with 電氣美術研究會 to bundle a modular accessory set with this product. The contents vary by season — patch cables, power cables, a dress-nut sample set, a mono splitter, and more. The set is included with the product, so please give it a try! - [電氣美術研究會](https://ears-modular.com/) That concludes our introduction of the M3S Mini Stereo Mixer. [![Weston Precision Audio: M3S Mini Stereo Mixer](https://imgs.takazudomodular.com/images/p/weston-m3s-0-front__og/revisions/production/r1-8a2a56f438b9d5ec13ef88206b344aefc2980667d9b5f1602d0e2db9959ed00b/2000w.webp) Weston Precision Audio: M3S Mini Stereo Mixer 19,800 yen (tax & shipping included)](https://jp.mercari.com/shops/product/2JP8EJTLuAc6AZPNYoAUN5) - [Buy this item via Buyee (International shipping)](https://buyee.jp/mercari/item/2JP8EJTLuAc6AZPNYoAUN5) We hope you find this helpful. ## Product information (catalog snapshot) This is the catalog information published on the site when it was built. It is not a guarantee of live Mercari Shops inventory; check the purchase page for current availability. ### M3S Mini Stereo Mixer - Brand: Weston Precision Audio - Price: ¥19,800 (JPY) - Status: Listed for sale (on Mercari Shops) - Width: 6HP - Depth: 25mm - Purchase page: - Purchase page: