ADDAC System ADDAC807B
The silent partner in a modular summing dream — no power draw, all jacks, zero clutter.
Overview
If a Eurorack system is turning into a bowl of spaghetti, the ADDAC807B Inputs Console helps. It doesn't make sound. It doesn't process anything. It doesn't even draw power. It holds every cable in place. It's the input-facing half of the ADDAC807A/807B stereo summing setup, a 24 HP expander where all the audio, CV and control signals plug in, so the main console can 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.
ADDAC System is a Portuguese boutique known for clean, architectural Eurorack designs. The 807B isn't sold alone. It's bundled with the ADDAC807A Main Console, and 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 cables don't crowd the front panel of the main module. That's the point of the split. The Inputs Console can go where it's convenient (top row, side panel, another row entirely) while the faders and controls of the 807A stay front and center. 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 works with the ADDAC807C Expansion Console, which adds four more stereo channels to the system. Unlike some expanders that feel like afterthoughts, the 807B is integral. No 807A? You can't use it. It has no power connector. It draws nothing and 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. That leaves the mixing module (the 807A) clean, with only faders, switches and outputs visible. All patching happens on the 807B. In a large system, this physical separation helps a lot. You can put the Inputs Console where cable access is easiest, say on a top row or near your audio interface, and keep the 807A's faders in a central, performance-friendly spot.
Modular Expansion by Design
This isn't a standalone unit. It's an expander by definition. The 807B only works when paired with the ADDAC807A, and power is passed directly from the main console. There's no power header on the 807B itself. 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 the 807B doesn't draw current independently, your power supply never sees it. 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, and the price listed for the 807A includes both modules. That 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.
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. The system is modern and still in production, so 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. If you lose it, finding a replacement won't be easy, since people don't sell it solo.
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