Reliably mix your Eurorack signals and output them to TRS line level. The 4ms Listen 4 Quarters Mixer Module is an extremely simple but versatile mixer module. It allows up to four channels to mixed down and sent out via TRS line level to any equipment you can think of. It's ideal for sending to amplifiers, effects units like guitar pedals, and your audio interface for easy recording. It features four channels, two have mono inputs with pan controls and the other two are stereo channels with dual inputs. This utility module features everything you need to mix your modular synth and can even be daisy chained with other Listen 4 Mixers to increase your channel count.
Reliable Mixing
Four channels of stereo mixing, with TRS line level jack outputs, as well as a headphone output. The Listen 4 Quarters module is an extremely useful utility module. Out of the four channels, two have mono inputs with pan controls and the other two are stereo channels with dual inputs. This provides optimised compatibility with both stereo and mono. If four channels are not enough then you can daisy chain multiple Listen modules.
The Listen 4 Quarters features LEDs to indicate clipping, anti-pop, and excessively low noise. If you rely on multiple ins and outs as part of your Eurorack then trust in 4ms to deliver and distribute your signal perfectly, every time.
Features
- Four channel Eurorack mixer
- TRS Line level output
- Headphone output
- Trim pot for clipping light level
- Daisy Chaining
- Anti-pop circuitry
- Specifications
- 12HP Eurorack format module
- 1.13” (28.7mm) maximum depth (includes power cable)
- 10-pin Eurorack power header
Power consumption
- Maximum values without using headphones jack:
- Main outputs shorted to ground, headphones jack not used, maximum signal levels on all channels
- +12V: 107mA
- -12V: 101mA
- Maximum values in worst-case conditions:
- All outputs including headphone jack shorted to ground, maximum signal levels on all channels
- +12V: 290mA
- -12V: 101mA
Main outputs
- Output type: balanced zero-impedance, compensated for electrolytic capacitor distortion
- Frequency Response: +/-0.2dB max deviation, 10Hz - 20kHz
- Maximum output level: 17.1V peak-to-peak (+17.8dBu)
- Maximum gain of channels 1 and 2: -4.4dB (hard-panned), -9.1dB (center-panned)
- Maximum gain of channels 3 and 4, and INS header: -7.5dB
Headphones jack
- Frequency response: -0.2dB at 20Hz; 0dB at 100Hz to 20kHz (driving 32Ω headphones)
- Maximum voltage (peak-to-peak): 5Vpp
- Width: 12HP
- Depth: 29mm
- Power: 290 mA +12V / 101 mA -12V / 0 mA 5V
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
Reliably mix your Eurorack signals and output them to TRS line level. The 4ms Listen 4 Quarters Mixer Module is an extremely simple but versatile mixer module. It allows up to four channels to mixed down and sent out via TRS line level to any equipment you can think of. It's ideal for sending to amplifiers, effects units like guitar pedals, and your audio interface for easy recording. It features four channels, two have mono inputs with pan controls and the other two are stereo channels with dual inputs. This utility module features everything you need to mix your modular synth and can even be daisy chained with other Listen 4 Mixers to increase your channel count.
Reliable Mixing
Four channels of stereo mixing, with TRS line level jack outputs, as well as a headphone output. The Listen 4 Quarters module is an extremely useful utility module. Out of the four channels, two have mono inputs with pan controls and the other two are stereo channels with dual inputs. This provides optimised compatibility with both stereo and mono. If four channels are not enough then you can daisy chain multiple Listen modules.
The Listen 4 Quarters features LEDs to indicate clipping, anti-pop, and excessively low noise. If you rely on multiple ins and outs as part of your Eurorack then trust in 4ms to deliver and distribute your signal perfectly, every time.
Features
- Four channel Eurorack mixer
- TRS Line level output
- Headphone output
- Trim pot for clipping light level
- Daisy Chaining
- Anti-pop circuitry
- Specifications
- 12HP Eurorack format module
- 1.13” (28.7mm) maximum depth (includes power cable)
- 10-pin Eurorack power header
Power consumption
- Maximum values without using headphones jack:
- Main outputs shorted to ground, headphones jack not used, maximum signal levels on all channels
- +12V: 107mA
- -12V: 101mA
- Maximum values in worst-case conditions:
- All outputs including headphone jack shorted to ground, maximum signal levels on all channels
- +12V: 290mA
- -12V: 101mA
Main outputs
- Output type: balanced zero-impedance, compensated for electrolytic capacitor distortion
- Frequency Response: +/-0.2dB max deviation, 10Hz - 20kHz
- Maximum output level: 17.1V peak-to-peak (+17.8dBu)
- Maximum gain of channels 1 and 2: -4.4dB (hard-panned), -9.1dB (center-panned)
- Maximum gain of channels 3 and 4, and INS header: -7.5dB
Headphones jack
- Frequency response: -0.2dB at 20Hz; 0dB at 100Hz to 20kHz (driving 32Ω headphones)
- Maximum voltage (peak-to-peak): 5Vpp
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.
