ADDAC 807 (2017–)

A modular mixer that feels like conducting an orchestra — with faders, sends, and CV control that turn mixing into performance.

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, packed with hands-on faders, pan pots, mute buttons, and cue controls. The ADDAC807B (24 HP) is the dedicated input console, housing all the jacks, CV inputs, and signal routing options. Together, they form an 80 HP powerhouse that brings studio-grade mixing topology into the modular world. And if that’s not enough, there’s the ADDAC807C expansion, adding four more stereo channels for a total of nine. That’s not just overkill — it’s orchestral ambition in a Eurorack chassis.

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

Key Features

The Console Philosophy: Separation of Control and Connectivity

Most Eurorack mixers cram jacks and controls onto the same panel, leading to a cluttered, cable-obscured mess. The 807 flips that script. The 807A is pure interface — faders, knobs, switches, LEDs — while the 807B handles all the patching. This means you can mount the 807B in a less accessible part of your case and keep the 807A up front, where your hands can fly across faders like a live sound engineer. It’s a design choice that prioritizes playability over density, and it pays off in performance. You’re not fighting cables to adjust a level — you’re shaping the mix in real time, eyes on the LEDs, fingers on the faders.

CV as a First-Class Citizen

The 807 doesn’t just accept CV — it expects it. 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, letting you modulate effect depth in real time. Even the master, cue, and matrix levels have CV inputs, making the entire mix subject to modulation. This isn’t a mixer that sits statically in the background; it’s a dynamic element of your patch, capable of evolving textures, rhythmic swells, and spatial movement that would take dozens of utility modules to replicate.

Expansion That Scales With Ambition

The base 807A+B gives you five stereo channels — plenty for most setups. But if you’re building a large system or integrating external synths, the 807C expansion adds four more, bringing the total to nine. And for those who need post-fader individual outputs (say, for multitrack recording), the 807A+ adds five stereo outputs at 6 HP and zero current draw. These expansions aren’t afterthoughts — they’re integral to the 807’s vision as a full-featured console. The fact that ADDAC offers them as modular upgrades rather than locking you into a single configuration shows a deep understanding of how modular users actually build their systems.

Historical Context

When the ADDAC 807 was announced in 2017, Eurorack mixing was still dominated by 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 compromise-laden. The 807 arrived as a statement piece — a declaration that modular synthesis could support full-featured, console-style mixing without sacrificing integration. It drew inspiration from large-format analog desks like Neve and SSL, but reinterpreted their topology for the modular world: not just summing, but 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. But the 807’s advantage was total Eurorack integration: no need for external I/O modules, no level mismatches, no CV-to-gate translation. It brought the console experience inside the case, where it could interact directly with oscillators, filters, and sequencers. At a time when modular was often criticized for being “too clean” or “too digital-sounding,” the 807 offered a way to bring back the warmth, movement, and hands-on control of vintage studio workflows — not through emulation, but through architecture.

Collectibility & Value

The ADDAC 807 has never been a budget module. Priced at €1,480 for the 807A+B pair, it targets serious users with large systems and deep pockets. 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. These prices reflect both the build quality and the irreplaceable functionality: there’s no other Eurorack mixer that offers this level of console-style control with full CV integration.

Failures are rare, but not unheard of. The most common issue reported is LED burnout or flickering, usually due to power fluctuations or aging components. The faders themselves are high-quality but not immune to dust or wear — cleaning with contact cleaner can restore smooth operation. Because the 807 draws a hefty 650 mA on each rail, it demands a robust 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 careful 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 — while they’re sold as a pair, mismatched units can have slight calibration differences. Also confirm whether the seller includes the 807A+ or 807C expansions, as these significantly increase utility. Given the price, it’s worth asking for a demo video to ensure everything functions as expected.

eBay Listings

ADDAC System ADDAC807A+ (Black) Modular EURORACK - NEW - PER

$119

As an eBay Partner, we earn from qualifying purchases. This helps support our independent vintage technology research.

Related Models

• ADDAC 200PI Pedal Integrator
• ADDAC 816
• ADDAC 100 Series
• ADDAC 101 .WAV Player
• ADDAC 102
• 4ms Ping
• ADC 27
• 2hp LPG V2
• ALM AXON-2
• AMS DMX 2000