ADDAC System ADDAC807A (2017–Present)

A full-size analog console shrunk into Eurorack—complete with faders, sends, returns, CV control, and a layout so intuitive it feels like cheating.

Overview

Plug in the ADDAC807A and suddenly your modular rig stops feeling like a lab experiment and starts feeling like a real studio. This isn’t just another mixer—it’s a full-blown analog console, the kind you’d expect to see dominating a vintage Neve or SSL setup, only now it fits in your rack and speaks CV like a native. The first time you flip the cue switch and hear your mix fold into pristine, level-matched headphones, or tweak the matrix routing with a single attenuverter, you realize how badly you’ve been missing this kind of hands-on control. It’s not subtle: at 56 HP for the main module and another 24 HP for the companion inputs unit, the ADDAC807A+B combo takes up serious real estate. But every millimeter earns its keep. Five stereo channels, three stereo sends, three returns, a master section with full CV control, and a matrix bus that lets you route anything to anywhere—this is the modular equivalent of upgrading from a studio apartment to a house with a proper control room.

What sets the 807A apart isn’t just the scale, but the thoughtfulness baked into the design. ADDAC didn’t just port a console layout into Eurorack—they reimagined it for the format. Instead of cramming all the jacks on the front panel and creating a spaghetti mess, they split the system: the 807A is the control surface, all knobs, switches, and LEDs, while the 807B handles all the inputs and CV connections, letting you tuck the patching chaos out of sight. That separation turns what could be a frustrating routing puzzle into something elegant and fast. You can mute, pan, send, and cue like a live sound engineer, but also modulate every parameter with CV—automate your mix, sequence your effects returns, or let an LFO sneak in a slow pan shift across a stereo channel. It’s rare for a module to feel both immediate and deep, but the 807A pulls it off. And yes, it sounds clean—transparent, even—but that’s the point. This isn’t a color box. It’s infrastructure. It’s the backbone your system didn’t know it needed until you hear how much tighter everything locks in.

Specifications

Manufacturer	ADDAC System
Production Years	2017–Present
Original Price	€1480 (as part of ADDAC807A+B pair)
Format	Eurorack
Width	56 HP (ADDAC807A)
Depth	4.5 cm
Weight	1.5 kg (3.3 lb)
Max Current Draw	650mA on +12V, 650mA on -12V
Bus Board Connector	8×2 IDC (Doepfer style)
Channels	5 stereo channels (expandable to 9 with ADDAC807C)
Sends	3 stereo sends (Send 1, Send 2, Send 3)
Returns	3 stereo returns (Return 1, Return 2, Return 3)
Matrix Bus	1 stereo matrix with level, attenuverter, and send/return routing
Cue System	Dedicated cue bus with mix/cue balance, level, and routing to headphones
Headphones	Stereo output with volume control and selectable source (cue, send/return)
CV Inputs	±5V for volume, pan, send, return, matrix, and cue levels
Output Level	Line level (stereo master, individual channel outputs via expansion)
Individual Channel Outputs	Available via ADDAC807A+ expansion (5 stereo post-fader outputs)

Key Features

The Console Layout That Just Works

Most Eurorack mixers make you compromise: fewer channels, no sends, or a cramped interface that turns mixing into a chore. The ADDAC807A doesn’t play that game. It gives you a full channel strip for each of five stereo inputs, with dedicated volume and pan knobs, mute buttons, pre/post send toggles, and even mono switches—all laid out in a way that mirrors professional studio consoles. The LEDs under each knob aren’t just for show; they give instant visual feedback on levels and pan position, so you’re not guessing when you’re clipping or panning hard left. The send and return sections are equally robust, with individual level controls and their own cue/mix switches, letting you audition effects in real time without breaking the main mix. And the master section? It’s got a proper master fader, a cue mix balance, and even a cue-to-master level knob so you can set how much of the cue signal bleeds into the main output—something you’d usually need external gear to pull off.

CV Control Without Compromise

What makes the 807A more than just a pretty face is how deeply it integrates with the rest of your system. Every major parameter—volume, pan, send level, return level, matrix level, cue level—has a CV input with an attenuverter. That means you’re not just automating levels; you’re sculpting the entire mix dynamically. Want to pan a sequence across the stereo field in sync with your clock? Patch it in. Need a send level to swell with an envelope? Done. The matrix bus can be modulated too, letting you create evolving submixes that shift in intensity based on an LFO or random source. And because the 807B separates the CV inputs from the control panel, you don’t have to sacrifice usability for patchability. It’s a rare balance: tactile, immediate control on the front, infinite modulation potential behind the scenes.

Expandability That Scales With Your Needs

Five stereo channels might sound like overkill, but modular systems grow fast—and ADDAC knew that. The 807A supports the ADDAC807C Expansion Console, which adds four more stereo channels, bringing the total to nine. That’s enough to handle a full modular rig plus external synths, drum machines, or even a live input. But the expansion isn’t just about channels. The ADDAC807A+ gives you five individual post-fader stereo outputs, which is a godsend for multitrack recording. Instead of relying on the master output and re-patching everything, you can send each channel straight to your DAW, preserving your mix settings while capturing stems. That kind of flexibility is usually found in high-end studio gear, not Eurorack modules. And because the 807B handles all the line-level inputs and level conversion, you can plug in gear from outside the modular world—outboard synths, effects, even guitars—without worrying about impedance or signal clipping.

Historical Context

When the ADDAC807A launched in 2017, Eurorack was already overflowing with mixers—but most were either simple summing boxes or feature-limited utility modules. WMD’s Performance Mixer was popular, but lacked true stereo sends and a dedicated cue system. Intellijel’s Pan Stack was compact but minimal. ADDAC saw a gap: what if you could have a full console experience, with all the routing and control of a professional desk, but built from the ground up for modular? The result was a statement piece, both in size and ambition. At a time when many were chasing skiff-friendly 4HP modules, ADDAC went the opposite direction—proving that some ideas need space to breathe. The 807A wasn’t just competing with other mixers; it was positioning itself as an alternative to external analog mixers like the A&H MixWizard or Soundcraft Ghost, which some modular users were already adopting. But unlike those, the 807A lived inside the system, with full CV integration, no breakout boxes, and no signal conversion hassles. It was a bet that modular users wanted more than just sound generation—they wanted a complete, self-contained production environment. And for a certain tier of user—live performers, studio obsessives, those with wall-sized racks—it paid off.

Collectibility & Value

The ADDAC807A isn’t a module you casually pick up. Even at its original €1480 price (for the A+B pair), it was a significant investment, and today it rarely sells for less. On the used market, a full 807A+B set typically goes for $1,200–$1,600, depending on condition and whether it includes the 807C expansion or 807A+ outputs. Because it’s a relatively modern module (post-2017) and still in production, it’s not exactly “vintage” in the traditional sense—but it’s already achieved cult status among modular engineers and live performers who value its unparalleled control. That said, it’s not without quirks. The sheer size means it’s a dealbreaker for anyone with limited rack space. And while the build quality is excellent—solid knobs, crisp labeling, reliable jacks—it’s not indestructible. Owners report that the LEDs, while gorgeous, can occasionally flicker if the power supply is noisy or undersized, so a clean, high-current supply is non-negotiable. The 807B’s input jacks are also densely packed, making patching with thick cables a tight squeeze. But the real test of ownership is whether you actually use it. This isn’t a “set and forget” module. It demands engagement. If you’re the kind of user who likes to tweak, automate, and re-route on the fly, the 807A becomes indispensable. If you just need a simple summing solution, you’re overpaying. But for those who treat modular like a real studio, the 807A isn’t just useful—it’s transformative.