ADDAC System ADDAC807B
The silent partner in a modular summing dream — no power draw, all jacks, zero clutter.
Overview
If your Eurorack system is starting to look like a bowl of spaghetti, the ADDAC807B Inputs Console might just be the organizing brain you didn’t know you needed. It’s not a module that makes sound. It doesn’t process anything. It doesn’t even draw power. But what it does — and does brilliantly — is get out of the way while holding every last cable in place. Designed as the input-facing half of the ADDAC807A/807B stereo summing setup, this 24 HP expander is where all your audio, CV, and control signals plug in, letting the main console handle the mixing and routing. Think of it as the doorman: it doesn’t run the club, but it knows who’s coming in and where they’re supposed to go.
Manufactured by ADDAC System, a Portuguese boutique known for clean, architectural Eurorack designs, the 807B isn’t sold alone — it’s bundled with the ADDAC807A Main Console. Together, they form a high-channel-count, voltage-controlled stereo summing mixer built for complex modular rigs. The 807B’s entire job is to house the jacks — all of them — so you can route cables neatly without crowding the front panel of the main module. This separation is the whole point: you can mount the Inputs Console where it’s convenient (top row, side panel, another row entirely) while keeping the faders and controls of the 807A front and center. It’s a small thing, but in a 100+ HP system, cable management can make or break your workflow.
It’s part of the ADDAC800 Series, a family of precision utility and mixing modules that includes everything from clock dividers to multi-function processors. The 807B specifically plays well with the ADDAC807C Expansion Console, which adds four more stereo channels to the system — modular scalability at its most surgical. But unlike some expanders that feel like afterthoughts, the 807B is integral. No 807A? You can’t use it. It doesn’t even have a power connector. It draws nothing, does nothing on its own — it’s pure interface.
Specifications
| Manufacturer | ADDAC System |
| Dimensions | 24 HP |
| Width | 24HP |
| Depth | 45 mm |
| Current Draw | Module does not draw current |
| Power consumption | ~800mA on each rail together (for ADDAC807A and ADDAC807B combined) |
| Requires | ADDAC807A |
| Power | Provided by the ADDAC807A |
Key Features
Jack Hub Architecture
The ADDAC807B holds every input jack for the ADDAC807A system — audio inputs, CV controls, channel settings, the works. This means the actual mixing module (the 807A) stays clean, with only faders, switches, and outputs visible. All patching happens on the 807B. For users building large systems, this kind of physical separation is a godsend. You can place the Inputs Console where cable access is easiest — say, on a top row or near your audio interface — while keeping the 807A’s faders in a central, performance-friendly location. It’s a rare example of a module designed with ergonomics in mind, not just signal flow.
Modular Expansion by Design
This isn’t a standalone unit — it’s an expander by definition. The 807B only functions when paired with the ADDAC807A, and power is passed directly from the main console. There’s no power header on the 807B itself; it’s powered entirely through its connection to the 807A. That keeps wiring simple and ensures the pair behaves as a single system. The combined power draw is approximately 800mA on each rail, which is substantial but expected for a high-channel mixer with VC capabilities. Because it doesn’t draw current independently, the 807B is essentially invisible to your power supply — it’s just an extension of the 807A’s footprint.
Bundled System, Not a Standalone Sale
You can’t buy the ADDAC807B by itself. It’s sold as part of the ADDAC807A package — the price listed for the 807A includes both modules. This makes sense functionally, but it also means there’s no standalone market value for the 807B. If you see one listed alone, it’s likely part of a used bundle or a spare from a system teardown. The manufacturer’s website confirms the pairing, and ModularGrid classifies it as an inseparable companion. It’s a design philosophy: the Inputs Console isn’t an accessory. It’s half of a whole.
Collectibility & Value
The ADDAC807B is currently available as part of the ADDAC807A system, according to ModularGrid. Since it’s not sold separately, there’s no individual pricing — the 807A’s price covers both units. A used set (ADDAC807A and 807B) has been spotted listed for sale on ctrl-mod.com, though no price, condition, or date details were available in the research. Given that the system is modern and still in production, it’s not a vintage collectible in the traditional sense. There’s no data on common failures, maintenance needs, or long-term reliability — likely because it has no active circuitry. With no components to fail, the 807B is probably the most durable module in your rack. But if you lose it, good luck finding a replacement — it’s not the kind of thing people sell solo.
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