ADDAC 807 (2017–)

A modular mixer with faders, sends, and CV control, so mixing becomes something you play.

Overview

It’s rare for a Eurorack mixer to make you forget you’re in a 3U case. The ADDAC 807 doesn’t just mix signals — it reimagines what a modular console can be, borrowing the architecture of vintage analog desks and translating it into a format that feels both familiar and revolutionary. This isn’t a utility module you tuck in the corner; it’s the centerpiece, the command center, the thing you reach for when you want to shape not just levels, but motion, space, and dynamics. When you power it up and see those twin rows of faders, glowing LEDs, and color-coded sections, you don’t feel like you’re patching — you feel like you’re conducting.

The 807 isn't a single module. It's a system. The ADDAC807A (56 HP) is the main control surface, with faders, pan pots, mute buttons, and cue controls. The ADDAC807B (24 HP) is the input console, and it holds all the jacks, CV inputs, and signal routing options. Together they take up 80 HP. There's also the ADDAC807C expansion, which adds four more stereo channels for a total of nine.

What sets the 807 apart isn’t just its size, but its intelligence. Every channel has CV control over level and pan, with attenuverters so you can invert or scale modulation. Sends are pre/post switchable, with three stereo send buses that can route to external effects or internal processors. Returns bring line-level signals back up to modular levels — crucial when integrating outboard gear. The matrix section acts like a submixer, letting you route groups to different outputs or create alternate monitor mixes. And the cue system? It’s full-featured, with balance controls, level CV, and switchable sources so you can preview sends, the main mix, or isolated channels. This is mixing as performance — not just setting levels, but modulating them in real time, automating pans, muting sections on the fly, and building dynamic shifts that evolve with your patch.

Specifications

Manufacturer	ADDAC System
Production Years	2017–
Original Price	1480.00 € (807A + 807B)
Module Type	Eurorack VC Stereo Summing Mixer
Width	56 HP (807A) + 24 HP (807B) = 80 HP total
Depth	45 mm
Weight	1.5 kg (3.3 lb)
Power Consumption	650 mA @ +12V, 650 mA @ -12V
Bus Board Connector	8×2 IDC (Doepfer style)
CV Input Range	±5 V
Channels	5 stereo channels (expandable to 9 with 807C)
Sends	3 stereo send buses
Returns	3 stereo return channels
Matrix Outputs	Stereo, mono, and CV-controllable
Individual Outputs	Available via ADDAC807A+ expansion (5 stereo post-fader outputs)
Input Types	Stereo line-level, mono synth-level, CV control inputs
Output Types	Stereo line-level main, cue, returns, matrix, individual channel (with expansion)
Headphone Output	Dedicated stereo output with level and source switching
Features	Per-channel mute, cue routing, pre/post send switching, phase inversion, synth/line input switching, LED level indicators

Key Features

The Console Philosophy: Separation of Control and Connectivity

Most Eurorack mixers put jacks and controls on the same panel, and the cables end up covering the controls. The 807 splits the job. The 807A is all interface - faders, knobs, switches, LEDs - and the 807B handles the patching. That means the 807B can go in a hard-to-reach part of your case while the 807A stays up front under your hands. You adjust a level without fighting cables.

CV as a First-Class Citizen

The 807 expects CV. Every channel's level and pan has a dedicated CV input with an attenuverter, so you can modulate volume with an LFO, automate panning with a sequencer, or duck channels using envelope followers. Sends are CV-controllable too, so effect depth can move in real time. The master, cue, and matrix levels also have CV inputs, which puts the whole mix under modulation.

Expansion That Scales With Ambition

The base 807A+B gives you five stereo channels. If you're building a large system or bringing in external synths, the 807C expansion adds four more, for a total of nine. For post-fader individual outputs, say for multitrack recording, the 807A+ adds five stereo outputs at 6 HP and zero current draw. ADDAC sells these as modular upgrades instead of locking you into one configuration.

Historical Context

When the ADDAC 807 was announced in 2017, Eurorack mixing was still mostly utilitarian designs: simple VCA mixers, passive summing buses, or compact performance mixers with limited routing. Modules like the WMD Performance Mixer offered CV control and sends, but they were compact and made compromises. The 807 drew on large-format analog desks like Neve and SSL, and reworked their topology for modular: summing, routing, monitoring, cueing, and CV automation.

Its closest competitor wasn't another Eurorack module. It was a standalone mixer like the Allen & Heath MixWizard, as some users noted in forum discussions. The 807 had total Eurorack integration: no external I/O modules, no level mismatches, no CV-to-gate translation. The console sits inside the case and talks directly to oscillators, filters, and sequencers. Modular was often criticized for being "too clean" or "too digital-sounding," and the 807 gave users the movement and hands-on control of vintage studio workflows through its architecture, not through emulation.

Collectibility & Value

The ADDAC 807 has never been a budget module. It was priced at €1,480 for the 807A+B pair. On the used market, it typically sells for 80-90% of original price - around $1,300 - $1,500 depending on condition and region. The 807C expansion, originally €600, trades for $450 - $550. There's no other Eurorack mixer that offers this level of console-style control with full CV integration.

Failures are rare, but they happen. The most common issue reported is LED burnout or flickering, usually due to power fluctuations or aging components. The faders are high-quality but not immune to dust or wear, and contact cleaner can restore smooth operation. The 807 draws a hefty 650 mA on each rail, so it needs a strong power supply. Underpowered cases can cause instability or noise. The module is also deep (45 mm), so it won't fit in shallow skiffs or crowded cases without planning.

When buying used, check that all faders and knobs move smoothly, that LEDs respond correctly, and that CV inputs respond to modulation. Verify that the 807A and 807B are from the same production batch if possible. They're sold as a pair, and mismatched units can have slight calibration differences. Also confirm whether the seller includes the 807A+ or 807C expansions, since these add a lot of utility. Given the price, ask for a demo video to make sure everything works.