Manufacturer's Description
EDU DIY Output Mixer 2 (mixer for our upcoming EDU DIY Drum system) allows you to build and understand a 4-channel output mixer from scratch. On a breadboard, you’ll set up an inverting summing amp, add a send/return loop, diode distortion, and a headphone driver.
The manual uses clear diagrams and analogies to explain every step, and you can even assemble the kit into a full Eurorack module using the included PCB and panel.
Skill level: Intermediate. Basic electronics knowledge needed. If you’ve completed our VCO or previous Mixer kits, you’re set.
What you’ll learn
Mixing basics:
- Op-amp summing
- Volume controls
- Per-channel sends
- Clean return path
Distortion design:
- Diode soft-clipping
- Variable distortion
Headphone driver design:
- DC blocking
- High-current output
- Driver stability
What the finished module can do
Once assembled using the included PCB and panel, you’ll get a Eurorack Output Mixer module with:
- 4 input channels with per-channel volume controls
- Send/return loop with per-channel send controls and return control
- Variable distortion insert effect
- Line and Headphone outputs
What’s included
- All components for the breadboard build
- Eurorack panel + PCB for final assembly
- Power cable
- 40+ page illustrated PDF manual as digital download
You’ll also need: a breadboard, jumpers, dual supply (or two 9V batteries and clip connectors).
Want a smoother start? Labor is our purpose-built prototyping platform for our learning kits. It replaces the breadboard, jumpers, and power supply with a single intuitive workspace designed specifically for learning analog circuit design.
About the series
This kit is part of our mki x es.EDU Drums System lineup – a collaboration between Erica Synths and Moritz Klein to make analog drum machine design accessible, hands-on, and genuinely educational.
NB: This kit is designed as a self-guided learning tool. While we don’t offer individual support for failed builds, the manual includes a detailed troubleshooting section to help you diagnose and fix issues yourself – a crucial part of the learning experience.
How much is my shipping?
Shipping costs are calculated automatically at checkout. Simply add items to your cart and proceed to the checkout page, where you'll see the available shipping options and their prices. VAT at the applicable rate for your country will also be displayed at checkout.
European Union orders:
- Standard shipping is free on orders over €100. Express shipping is available on orders over €100, and free on orders over €400.
Poland orders:
- Standard shipping is free on orders over 250 PLN. Express shipping is free on orders over 500 PLN.
What about local taxes?
By default prices on the site include sales tax at 20%. The precise sales tax rate for your country will be calculated at checkout.
Do you ship to my country?
We ship to all EU member states from our warehouse in Warsaw, Poland. Add an item to your cart and enter your country and postcode to see the available shipping options and prices for your location. If you have any questions about shipping to your country, drop us an email at info@signalsounds.eu and we'll be happy to help.
Shipping methods
All EU orders are shipped via UPS. We offer two service levels:
- UPS Standard – our default shipping option. Delivery times vary by country (see estimated delivery times below).
- UPS Express Saver – next business day delivery to most EU destinations.
Each product page shows the estimated delivery time for your location, so you'll always know what to expect before you order.
Estimated delivery times (Standard shipping)
The times below are estimates in working days from dispatch, based on UPS Standard service. Express Saver delivers by the next business day to most destinations.
| Country | Estimated delivery (working days) |
|---|---|
| Austria | 2–3 |
| Belgium | 2 |
| Bulgaria | 4–5 |
| Croatia | 2–4 |
| Cyprus | 10 |
| Czechia | 2–3 |
| Denmark | 3 |
| Estonia | 2–3 |
| Finland | 3–5 |
| France | 2–4 |
| Germany | 2 |
| Greece | 5–7 |
| Hungary | 2–3 |
| Ireland | 4–6 |
| Italy | 3–5 |
| Latvia | 2–3 |
| Lithuania | 1–2 |
| Luxembourg | 2 |
| Malta | 5–7 |
| Netherlands | 2 |
| Poland | 1–2 |
| Portugal | 4–5 |
| Romania | 3–4 |
| Slovakia | 2–3 |
| Slovenia | 2–3 |
| Spain | 4 |
| Sweden | 3–5 |
These times are estimates and are not guaranteed. Delivery may occasionally take a little longer due to customs processing, local conditions, or carrier delays.
Dispatch times
Orders placed before 15:00 CET (Central European Time) on a working day are normally dispatched the same day. Orders placed after 15:00 CET, or on weekends and public holidays, will be dispatched on the next working day.
If you have an urgent order, please email us at info@signalsounds.eu before placing your order and we'll do our best to accommodate you.
Pre-orders
If a product is listed as a pre-order, it means we've ordered it from the supplier but it's not physically in stock yet. The product listing will include an estimated shipping date based on the best information we have from the supplier, but do bear in mind this is subject to change and is not a guaranteed date.
If you place an order containing a mixture of in-stock and pre-order items, we'll normally hold off on shipping anything until the pre-order item(s) have arrived, rather than splitting it into multiple shipments. If you need the in-stock items sooner, we'd recommend placing separate orders. As always, please get in touch at info@signalsounds.eu if you have questions.
Product Overview
Manufacturer's Description
EDU DIY Output Mixer 2 (mixer for our upcoming EDU DIY Drum system) allows you to build and understand a 4-channel output mixer from scratch. On a breadboard, you’ll set up an inverting summing amp, add a send/return loop, diode distortion, and a headphone driver.
The manual uses clear diagrams and analogies to explain every step, and you can even assemble the kit into a full Eurorack module using the included PCB and panel.
Skill level: Intermediate. Basic electronics knowledge needed. If you’ve completed our VCO or previous Mixer kits, you’re set.
What you’ll learn
Mixing basics:
- Op-amp summing
- Volume controls
- Per-channel sends
- Clean return path
Distortion design:
- Diode soft-clipping
- Variable distortion
Headphone driver design:
- DC blocking
- High-current output
- Driver stability
What the finished module can do
Once assembled using the included PCB and panel, you’ll get a Eurorack Output Mixer module with:
- 4 input channels with per-channel volume controls
- Send/return loop with per-channel send controls and return control
- Variable distortion insert effect
- Line and Headphone outputs
What’s included
- All components for the breadboard build
- Eurorack panel + PCB for final assembly
- Power cable
- 40+ page illustrated PDF manual as digital download
You’ll also need: a breadboard, jumpers, dual supply (or two 9V batteries and clip connectors).
Want a smoother start? Labor is our purpose-built prototyping platform for our learning kits. It replaces the breadboard, jumpers, and power supply with a single intuitive workspace designed specifically for learning analog circuit design.
About the series
This kit is part of our mki x es.EDU Drums System lineup – a collaboration between Erica Synths and Moritz Klein to make analog drum machine design accessible, hands-on, and genuinely educational.
NB: This kit is designed as a self-guided learning tool. While we don’t offer individual support for failed builds, the manual includes a detailed troubleshooting section to help you diagnose and fix issues yourself – a crucial part of the learning experience.
Technical Specs
Shipping Details
How much is my shipping?
Shipping costs are calculated automatically at checkout. Simply add items to your cart and proceed to the checkout page, where you'll see the available shipping options and their prices. VAT at the applicable rate for your country will also be displayed at checkout.
European Union orders:
- Standard shipping is free on orders over €100. Express shipping is available on orders over €100, and free on orders over €400.
Poland orders:
- Standard shipping is free on orders over 250 PLN. Express shipping is free on orders over 500 PLN.
What about local taxes?
By default prices on the site include sales tax at 20%. The precise sales tax rate for your country will be calculated at checkout.
Do you ship to my country?
We ship to all EU member states from our warehouse in Warsaw, Poland. Add an item to your cart and enter your country and postcode to see the available shipping options and prices for your location. If you have any questions about shipping to your country, drop us an email at info@signalsounds.eu and we'll be happy to help.
Shipping methods
All EU orders are shipped via UPS. We offer two service levels:
- UPS Standard – our default shipping option. Delivery times vary by country (see estimated delivery times below).
- UPS Express Saver – next business day delivery to most EU destinations.
Each product page shows the estimated delivery time for your location, so you'll always know what to expect before you order.
Estimated delivery times (Standard shipping)
The times below are estimates in working days from dispatch, based on UPS Standard service. Express Saver delivers by the next business day to most destinations.
| Country | Estimated delivery (working days) |
|---|---|
| Austria | 2–3 |
| Belgium | 2 |
| Bulgaria | 4–5 |
| Croatia | 2–4 |
| Cyprus | 10 |
| Czechia | 2–3 |
| Denmark | 3 |
| Estonia | 2–3 |
| Finland | 3–5 |
| France | 2–4 |
| Germany | 2 |
| Greece | 5–7 |
| Hungary | 2–3 |
| Ireland | 4–6 |
| Italy | 3–5 |
| Latvia | 2–3 |
| Lithuania | 1–2 |
| Luxembourg | 2 |
| Malta | 5–7 |
| Netherlands | 2 |
| Poland | 1–2 |
| Portugal | 4–5 |
| Romania | 3–4 |
| Slovakia | 2–3 |
| Slovenia | 2–3 |
| Spain | 4 |
| Sweden | 3–5 |
These times are estimates and are not guaranteed. Delivery may occasionally take a little longer due to customs processing, local conditions, or carrier delays.
Dispatch times
Orders placed before 15:00 CET (Central European Time) on a working day are normally dispatched the same day. Orders placed after 15:00 CET, or on weekends and public holidays, will be dispatched on the next working day.
If you have an urgent order, please email us at info@signalsounds.eu before placing your order and we'll do our best to accommodate you.
Pre-orders
If a product is listed as a pre-order, it means we've ordered it from the supplier but it's not physically in stock yet. The product listing will include an estimated shipping date based on the best information we have from the supplier, but do bear in mind this is subject to change and is not a guaranteed date.
If you place an order containing a mixture of in-stock and pre-order items, we'll normally hold off on shipping anything until the pre-order item(s) have arrived, rather than splitting it into multiple shipments. If you need the in-stock items sooner, we'd recommend placing separate orders. As always, please get in touch at info@signalsounds.eu if you have questions.
