ADDAC System ADDAC809 (2022)
It’s small, unassuming, and might just be the most quietly powerful routing brain your modular rack never knew it needed.
Overview
The ADDAC809 Chain Router has no blinking lights, no waveforms and no knobs. But patch it in and you can rewire entire signal paths on the fly, without touching a single cable. Announced on June 16, 2022, this 6 HP utility module is the ninth in ADDAC System's 800 series of analog sound utilities, a line built to solve subtle but critical patching problems. It's not a sound generator and it's not an effect. It directs traffic between your processors with CV control, so a static chain can change while you play.
The ADDAC809 is a dynamic I/O router for audio or CV. It sends one source through two separate chains, each with its own "To" output and "From" input, before landing at a final output. Say you have a delay, a looper and a granular mangler. Normally you patch them in a fixed order. With the 809 you can decide in real time whether your signal hits the delay first or the looper, whether both run in series or parallel, or whether you bypass them entirely. Gates, sequencers or manual buttons can all trigger the changes. As one reviewer put it: "ADDAC809 doesn't look like much but it could revolutionise your patching."
It works a bit like a compact matrix mixer, except that instead of blending signals it reroutes them through entire sub-patches. There are six routing patterns: straight through, Chain A only, Chain B only, A then B, B then A, or both in parallel. Each mode is selectable with the front-panel buttons or by CV. That means your sequencer can change the whole signal topology every four bars, or your envelope can trigger a detour through a reverb chain on every kick. The settings - Parallel, Order, Single/Dual, and Bypass - are directly triggerable.
Specifications
| Manufacturer | ADDAC System |
| Model | ADDAC809 Chain Router |
| Width | 6 HP |
| Depth | 55 mm |
| Current Draw | 80 mA +12V, 30 mA -12V, 0 mA 5V |
| Price | €160 (as of June 2022) |
| Announcement Date | June 16, 2022 |
| Product Type | Eurorack module, dynamic CV operated I/O router, utility chain router |
Key Features
Two Independent Send/Return Chains
The ADDAC809 gives you two fully independent effect loops, Chain A and Chain B. Each has a "To" output to send signal to external modules and a "From" input to bring it back. The jacks feed a routing engine that determines how and when signals flow. You can chain a filter into a distortion, or run parallel reverbs with different decay times, and the module handles the plumbing. The chains can be used individually, in series, or in parallel, without cluttering your patch bay.
Six Routing Modes, Fully CV Controllable
The six routing configurations are the core of it. You can go straight from input to output (bypass), route through just Chain A or B, send A into B or B into A, or run both chains in parallel. Each mode is selectable with the front-panel buttons, and each can also be switched by CV. That opens up automated signal routing, performance gestures and generative patches. A sequence could send every other note through a bit crusher, or a drone could shift from serial to parallel processing based on a slow LFO.
Performance-Ready Signal Orchestration
The controls are Parallel, Order (which chain comes first), Single/Dual (whether one or both chains are active), and Bypass. You can trigger them manually or with gate/CV, so the 809 works as a performance tool as well as a utility. Some users have modified their units with color-coded buttons - red for bypass, yellow for parallel, green for order, blue for dual/single - to make mode changes visible at a glance during live sets. As one practical example, you can route a single audio source through a delay and a looper, then use the 809 to decide whether the delay feeds the looper or vice versa, with no repatching.
Collectibility & Value
The ADDAC809 launched at €160 in June 2022. Original pricing in USD isn't confirmed, and current new prices on Reverb range from $188.26 to $233.29. Nightlife Electronics lists it at CAD$235.00. Used units in new condition have appeared on the EU market for €119.00 as of December 2025. It has an average rating of Ø 5.00 from two votes on ModularGrid, though the sample is small. There's no data on common failures or maintenance needs, but given its passive routing design and lack of sensitive audio circuitry, it's likely reliable and low-maintenance.
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