ADDAC 802 VCA Quintet (Out of Production)

Five VCAs, two mix paths, and a solo bus packed into 12 HP—this little Lisbon-built console does more than it has any right to.

Overview

The ADDAC802 VCA Quintet Mixing Console isn’t flashy, but if you’ve ever wrestled with patch density in a crowded Eurorack case, you’ll appreciate what this module quietly delivers. Built by ADDAC System in Lisbon, Portugal, it’s a five-channel analog VCA and mixer that manages to pack serious routing flexibility into a mere 12 HP. And while it may not scream for attention like some boutique modules, owners report it’s one of those “always-on” workhorses—once you have it, you can’t imagine your system without it.

It updates the earlier ADDAC802 Audio Mixer, refining the concept with individual VCAs per channel, switchable linear or logarithmic response, and a clever dual-path architecture that separates Mix and Solo buses. That means you can route any channel to either path—or cut it out entirely—using the Solo/Off/Mix switch. The Solo bus is specifically designed for pre-listening, so you can tap into a channel before it hits the main mix and send it to a headphone amp. It’s a small detail, but one that makes live tweaking or sound design significantly less chaotic.

Each channel features a VCA with a dedicated knob, a monitor LED, an independent output, and both CV input with attenuator. The master section includes a final VCA stage with pre and post outputs, so you can process the entire mix or split it before and after the final gain stage. And because all five VCAs can be used independently, you’re not limited to audio—these can handle CV, gates, or even clock signals if you need controlled attenuation across multiple parameters.

Despite its compact footprint, the module isn’t shy on connectivity: it offers a link input for daisy-chaining multiple units, separate outputs before and after the master VCA, and a dedicated solo bus output. It’s clearly designed with expandability in mind, letting you build out a modular mixing environment without bloating your case. Depth is a manageable 55 mm, so it fits comfortably in most systems without back-panel interference.

Specifications

Manufacturer	ADDAC System
Width	12 HP
Depth	55 mm
Current consumption	190 mA (+12 V) / 150 mA (-12 V)
Number of channels	5
Functions	Mixer, VCA
Format	Eurorack
Module Type	Mono
Power Supply	+-12v
Bus Board Cable Type	Doepfer 8x2 idc

Key Features

Five VCAs, One Smart Layout

Each of the five channels includes a fully functional VCA with a front-panel knob, switchable between linear and logarithmic characteristics—choose logarithmic for audio-level scaling that feels more natural to the ear, or linear for precise CV manipulation. The knob doubles as an offset/mix control with a unique behavior: at 12 o'clock, it’s at maximum attenuation, which some users find intuitive for balancing signals without clipping. It’s a small design quirk, but one that a Reverb seller called out as a personal favorite: “featuring ADDAC's unique offset/mix dual function knob... which I personally really like.”

Every channel also has its own CV input with attenuator, so you can modulate gain from an envelope, LFO, or sequencer with fine control. The independent output per channel means you can send a signal elsewhere in your system before it hits the mix bus—handy for parallel processing or feeding external gear.

Dual Mixing Paths: Mix and Solo

The real magic is in the dual-path design. The Mix path is your standard summing bus, but the Solo path operates independently, letting you pull any channel into a separate monitoring chain. The Solo/Off/Mix switch on each channel determines where the signal goes: Mix sends it to the main output, Solo routes it to the dedicated solo bus, and Off removes it from both. In Off mode, the VCA still functions, but the output is disconnected—so you’re not just muting, you’re fully isolating.

This isn’t just for headphones. You could route the solo bus to a delay for on-the-fly effect throws, or patch it into a spectrum analyzer to inspect individual channels. The solo bus output is normalized for pre-listening, but there’s nothing stopping you from repurposing it creatively.

Master VCA with Pre and Post Outputs

The master section adds a final VCA stage that affects the entire mix. It includes both a pre-master VCA output and a post-master VCA output, so you can split the signal—say, send the dry mix to your audio interface while processing the post-VCA version through external effects. The master also has its own CV input, so you can modulate the entire mix’s amplitude from a single source, useful for global swells, ducking, or amplitude sequencing.

And because the five channel VCAs can be used separately, you’re not locked into using this just as a mixer. You could treat it as a bank of five independent VCAs for CV processing, or split the channels across two different mix chains using the link input to cascade with another module.

Compact, But Not Compromised

At 12 HP and 55 mm deep, the 802 VCA Quintet is dense but not oppressive. It draws 190 mA on the +12 V rail and 150 mA on the -12 V, which is substantial for its size but expected given the number of active VCAs and summing stages. It uses a standard Doepfer 8x2 IDC bus board cable, so compatibility with most cases isn’t an issue. As a mono module in the Eurorack format, it’s designed to integrate seamlessly into both small and large systems—no special power or mounting tricks required.

Collectibility & Value

The ADDAC802 VCA Quintet is now out of production, according to a Reverb listing, and marked as “Sold Out” on Muff Wiggler—two signs that it’s no longer being manufactured. That scarcity is already reflected in pricing. While new units have listed at $415 and $492.08, used examples in excellent condition have changed hands for as low as $329. One seller described it as “a rare, now out of production module I almost neve…”—cut off mid-sentence, but the sentiment is clear.

Original pricing at launch hasn’t been confirmed, so it’s hard to say how much of the current market reflects inflation, demand, or collector behavior. But given the praise from users—like the Thomann review stating “ADDAC has some of the best modules ever!”—and the practical utility of the design, it’s no surprise that owners hold onto them. Another user on MOD WIGGLER put it bluntly: “It looks great with all the features and in such a small format... It's the best.”

There’s no public data on common failures or maintenance needs, but the lack of reported issues across forums and retailers suggests solid build quality. With no detailed circuit topology or component list available, deep repairs might require reverse engineering—but for now, it seems most people are too busy using it to take it apart.