The Neutron Flux 8 Pole Variable Character Filter is a 12hp skiff friendly Eurorack filter module with a stereo analog core and digital control over it. The digital control allows the core to shaped almost endlessly, taking on the character of almost any classic filter, and gives the filter the ability to explore sounds that have never been heard before.
Two 4 pole filter cores: These can be run in stereo, mono divided to stereo or chained as a 8 pole mono filter for almost LPG-like steep slope.
Characters: The green factory character bank has five characters with vintage spirit:
Fat – Our take on a ladderish filter character, great for slightly overdriven bass sounds.
Crisp – A bright state variable filter. Has a notch setting in the center of the mode pot.
Liquid – Spacey resonance. Filter pings dripping with dew.
Sour – The squelchy acid thing. Chained pole settings have a sour filter first and a flat distortion after.
Mean – This is all about bad behavior with distortion. Highly unstable.
Coming later in a firmware update, the Neutron Flux will also have two user banks (yellow and red) for more specialized filter characters which can be replaced via audio update.
Overdrive: Long press on the pole switch enables the boost circuit. It is a +20dB before the filter core. Most of the audible distortion happens on the first filter stages which go from clean via warm saturation to hard distortion. In all cases the drive pot acts as a volume pot, while the overdrive function switches two different ranges.
The topology of the Neutron Flux allows toggling the boost separately for each core. For example some special characters could have the boost operating between the cores when they are chained in the 6 or 8 pole modes. See the Sour character for a use case like this.
Stereo: This control spreads the cutoff between L and R channels and induces VCO-like drift. This way a mono signal can be split into wide stereo. The stereo effect isn’t like a micro delay or chorus but something else. It’s more like an animated binaural mismatched eq-like effect. A sole static cutoff spread between left and right is a bit troublesome because the stereo image would be crooked. This is why we added some VCO-like drift in the stereo function. You can use it as set-and-forget way or apply it on top of an single envelope or LFO in the CV input. This way the modulator’s effect is applied a bit differently to each side.
Another special function in some characters is that the center point in the stereo pot is the zero spot. Move it to one side and the other moves in the other way the same amount. This way the filter can do some cool symmetric stereo phaser effects.
- Width: 12HP
- Depth: 25mm
- Power: 150 mA +12V / 120 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
The Neutron Flux 8 Pole Variable Character Filter is a 12hp skiff friendly Eurorack filter module with a stereo analog core and digital control over it. The digital control allows the core to shaped almost endlessly, taking on the character of almost any classic filter, and gives the filter the ability to explore sounds that have never been heard before.
Two 4 pole filter cores: These can be run in stereo, mono divided to stereo or chained as a 8 pole mono filter for almost LPG-like steep slope.
Characters: The green factory character bank has five characters with vintage spirit:
Fat – Our take on a ladderish filter character, great for slightly overdriven bass sounds.
Crisp – A bright state variable filter. Has a notch setting in the center of the mode pot.
Liquid – Spacey resonance. Filter pings dripping with dew.
Sour – The squelchy acid thing. Chained pole settings have a sour filter first and a flat distortion after.
Mean – This is all about bad behavior with distortion. Highly unstable.
Coming later in a firmware update, the Neutron Flux will also have two user banks (yellow and red) for more specialized filter characters which can be replaced via audio update.
Overdrive: Long press on the pole switch enables the boost circuit. It is a +20dB before the filter core. Most of the audible distortion happens on the first filter stages which go from clean via warm saturation to hard distortion. In all cases the drive pot acts as a volume pot, while the overdrive function switches two different ranges.
The topology of the Neutron Flux allows toggling the boost separately for each core. For example some special characters could have the boost operating between the cores when they are chained in the 6 or 8 pole modes. See the Sour character for a use case like this.
Stereo: This control spreads the cutoff between L and R channels and induces VCO-like drift. This way a mono signal can be split into wide stereo. The stereo effect isn’t like a micro delay or chorus but something else. It’s more like an animated binaural mismatched eq-like effect. A sole static cutoff spread between left and right is a bit troublesome because the stereo image would be crooked. This is why we added some VCO-like drift in the stereo function. You can use it as set-and-forget way or apply it on top of an single envelope or LFO in the CV input. This way the modulator’s effect is applied a bit differently to each side.
Another special function in some characters is that the center point in the stereo pot is the zero spot. Move it to one side and the other moves in the other way the same amount. This way the filter can do some cool symmetric stereo phaser effects.
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.
