ADDAC System ADDAC807A (2017–Present)

A full-size analog console shrunk into Eurorack, with faders, sends, returns and CV control.

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.

ADDAC didn't just port a console layout into Eurorack. They split the system in two. The 807A is the control surface: knobs, switches and LEDs. The 807B handles all the inputs and CV connections, so the patching mess stays out of sight. You can mute, pan, send and cue like a live sound engineer, and you can also modulate every parameter with CV. Automate the mix, sequence the effects returns, or let an LFO push a slow pan shift across a stereo channel. It sounds clean and transparent, and that is the intent. It isn't a color box.

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 give something up: fewer channels, no sends, or a cramped interface. The ADDAC807A gives each of its five stereo inputs a full channel strip, with dedicated volume and pan knobs, mute buttons, pre/post send toggles and mono switches. The layout mirrors professional studio consoles. The LEDs under each knob show levels and pan position, so you can see when you're clipping or panning hard left. The send and return sections have individual level controls and their own cue/mix switches, so you can audition effects without breaking the main mix. The master section has a master fader, a cue mix balance, and a cue-to-master level knob that sets how much of the cue signal bleeds into the main output. You would usually need external gear for that.

CV Control Without Compromise

Every major parameter has a CV input with an attenuverter: volume, pan, send level, return level, matrix level and cue level. That covers more than level automation, since the whole mix can move. Pan a sequence across the stereo field in sync with your clock. Let an envelope swell a send level. The matrix bus can be modulated too, so submixes can shift in intensity from an LFO or random source. Because the 807B separates the CV inputs from the control panel, the front stays usable and the patching lives behind it.

Expandability That Scales With Your Needs

The 807A supports the ADDAC807C Expansion Console, which adds four more stereo channels and brings the total to nine. That is enough for a full modular rig plus external synths, drum machines or a live input. The ADDAC807A+ gives you five individual post-fader stereo outputs, which is handy for multitrack recording. Instead of relying on the master output and re-patching everything, you can send each channel straight to your DAW and capture stems with your mix settings intact. The 807B handles all the line-level inputs and level conversion, so outboard synths, effects and even guitars can plug in without impedance or clipping trouble.

Historical Context

The ADDAC807A launched in 2017, when Eurorack was already full of mixers. Most were simple summing boxes or feature-limited utility modules. WMD's Performance Mixer was popular, but it lacked true stereo sends and a dedicated cue system. Intellijel's Pan Stack was compact but minimal. ADDAC went for a full console experience, with the routing and control of a professional desk, built for modular. It was big in size and in ambition. Many people were chasing skiff-friendly 4HP modules at the time, and ADDAC went the other way. The 807A was positioned as an alternative to external analog mixers like the A&H MixWizard or Soundcraft Ghost, which some modular users were already adopting. Unlike those, it lived inside the system, with full CV integration, no breakout boxes and no signal conversion. It was a bet that modular users wanted a complete, self-contained production environment. For a certain tier of user, such as live performers, studio obsessives and those with wall-sized racks, it paid off.

Collectibility & Value

Its original price was €1480 for the A+B pair, 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. It's a relatively modern module (post-2017) and still in production, so it isn't vintage in the traditional sense. It has still gained a cult following among modular engineers and live performers. It has quirks. The size is a dealbreaker for anyone with limited rack space. The build quality is excellent, with solid knobs, crisp labeling and reliable jacks, but it isn't indestructible. Owners report that the LEDs can occasionally flicker if the power supply is noisy or undersized, so a clean, high-current supply is necessary. The 807B's input jacks are densely packed, which makes patching with thick cables a tight squeeze. It isn't a set-and-forget module. It rewards users who like to tweak, automate and re-route on the fly. For anyone who just needs a simple summing solution, it's overkill.