Manufacturer's description
Terminal 4 by Klavis is a quad-channel essential module that consolidates four independent signal paths, each housing a VCA, a low-pass gate (LPG), and an envelope generator. This is complemented by a versatile mono/stereo mixer.
Each VCA is DC-coupled, handling both audio and CV with precision, offering flexible amplitude shaping and modulation. They feature linear/logarithmic curve adjustment, offset setting, and zero-crossing switching for clean level transitions.
Stereo linking with manual and CV control of balance allows for seamless handling of dual-mono or spatialized stereo content.
The LPG section adds a distinct analog character with four dedicated low-pass gates, each offering three curated presets of typical warmth and organic sound. These provides tonal flexibility and creative coloration without extra patching.
The 6dB/Oct single Vactrol preset provides a delicate yet effective all-purpose embellishment
The 12dB/Oct dual-Vactrol one offers "the" classic and colourful LPG everyone expects, bringing ear-candy to any sound.
Finally, we included an LPG/OTA-VCF chimera presenting a 24dB/Oct cutoff for punchy and resonant filtering beyond traditional LPGs.
What truly elevates Terminal 4 is its integrated envelope section. Each channel features its own envelope generator with eight distinct templates, adjustable through proportional timing and tailored by linear to logarithmic curvature.
These envelopes can control the internal VCA or LPG directly or be routed out as CV sources for use elsewhere.
Unconnected outputs are down-mixed, respecting a mono or stereo flow as needed. 2/1, 2/2, and 3/1 combinations are handled automatically. Mixing applies to audio but also to external modulation signals and/or the onboard generated envelopes.
Clipping LEDs on each channel offer instant visual feedback for level control. For smooth editing, the matching of each pot setting and position is reflected in the nearby white LED, while an animation tells in which direction to turn.
This layered architecture allows Terminal 4 to serve as both a dynamic processor and a modulation hub. Whether deployed as a quad VCA, LPG, envelope bank, mixer — or all four simultaneously — it offers a powerful, space-conscious solution for nuanced control over amplitude, tone, and timing within a single Eurorack module.
Features
- 4 independent channels or 2 stereo pairs VCAs, each with:
- Audio & CV handling
- DC-coupling
- Lin/Log curve setting
- Offset setting
- Zero-crossing switching (ZX)
- Stereo linking with balance setting + CV
- Mixing of unconnected outputs
- Individual level clipping LEDs
- 4 dedicated LPGs, each with:
- Three presets offering various topologies and renderings
- 4 dedicated Envelope Generators, each with:
- 8 envelope templates
- Proportional time setting
- Lin/Log curve setting
- VCA/LPG control or envelope CV generation
- 5 LEDs indicating potentiometer vs. value matching for user-friendly editing
- Settings restored after power cycle
- Easy firmware update via a simple audio file
- 2mm thick aluminium panel
- Skiff-friendly & compact module
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.
- Free deliveryn and express delivery are not available to islands and remote areas including but not limited to Cyprus, Malta, Ceuta and more throughout the European Union. Add products to your cart and enter your address to confirm yoru shipping charge.
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
Terminal 4 by Klavis is a quad-channel essential module that consolidates four independent signal paths, each housing a VCA, a low-pass gate (LPG), and an envelope generator. This is complemented by a versatile mono/stereo mixer.
Each VCA is DC-coupled, handling both audio and CV with precision, offering flexible amplitude shaping and modulation. They feature linear/logarithmic curve adjustment, offset setting, and zero-crossing switching for clean level transitions.
Stereo linking with manual and CV control of balance allows for seamless handling of dual-mono or spatialized stereo content.
The LPG section adds a distinct analog character with four dedicated low-pass gates, each offering three curated presets of typical warmth and organic sound. These provides tonal flexibility and creative coloration without extra patching.
The 6dB/Oct single Vactrol preset provides a delicate yet effective all-purpose embellishment
The 12dB/Oct dual-Vactrol one offers "the" classic and colourful LPG everyone expects, bringing ear-candy to any sound.
Finally, we included an LPG/OTA-VCF chimera presenting a 24dB/Oct cutoff for punchy and resonant filtering beyond traditional LPGs.
What truly elevates Terminal 4 is its integrated envelope section. Each channel features its own envelope generator with eight distinct templates, adjustable through proportional timing and tailored by linear to logarithmic curvature.
These envelopes can control the internal VCA or LPG directly or be routed out as CV sources for use elsewhere.
Unconnected outputs are down-mixed, respecting a mono or stereo flow as needed. 2/1, 2/2, and 3/1 combinations are handled automatically. Mixing applies to audio but also to external modulation signals and/or the onboard generated envelopes.
Clipping LEDs on each channel offer instant visual feedback for level control. For smooth editing, the matching of each pot setting and position is reflected in the nearby white LED, while an animation tells in which direction to turn.
This layered architecture allows Terminal 4 to serve as both a dynamic processor and a modulation hub. Whether deployed as a quad VCA, LPG, envelope bank, mixer — or all four simultaneously — it offers a powerful, space-conscious solution for nuanced control over amplitude, tone, and timing within a single Eurorack module.
Features
- 4 independent channels or 2 stereo pairs VCAs, each with:
- Audio & CV handling
- DC-coupling
- Lin/Log curve setting
- Offset setting
- Zero-crossing switching (ZX)
- Stereo linking with balance setting + CV
- Mixing of unconnected outputs
- Individual level clipping LEDs
- 4 dedicated LPGs, each with:
- Three presets offering various topologies and renderings
- 4 dedicated Envelope Generators, each with:
- 8 envelope templates
- Proportional time setting
- Lin/Log curve setting
- VCA/LPG control or envelope CV generation
- 5 LEDs indicating potentiometer vs. value matching for user-friendly editing
- Settings restored after power cycle
- Easy firmware update via a simple audio file
- 2mm thick aluminium panel
- Skiff-friendly & compact module
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.
- Free deliveryn and express delivery are not available to islands and remote areas including but not limited to Cyprus, Malta, Ceuta and more throughout the European Union. Add products to your cart and enter your address to confirm yoru shipping charge.
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.
