ADDAC System ADDAC200S (2020s)
Three tiny jacks that solve one of Eurorack’s most annoying little problems—without stealing a single volt from your power supply.
Overview
It’s not often you find a module that’s both utterly essential and completely invisible—until you need it. The ADDAC200S Size Matter isn’t going to warp your sound, sequence your drums, or generate a single volt of CV. It doesn’t even draw power. But plug in a full-sized 1/4" cable and route it to a 3.5mm (1/8") jack deep in your rack, and suddenly, it’s the hero of your build. This 4 HP passive adapter module houses three individual 1/4" to 3.5mm converters, neatly mounted on a Eurorack-compatible panel so you can ditch the spaghetti tangle of inline adapters cluttering your studio floor. No soldering, no flimsy adapters getting yanked out mid-performance—just clean, secure, rack-mounted convenience.
In a world where Eurorack modules keep shrinking and utility is often an afterthought, the ADDAC200S is a quiet rebuttal to overengineering. It doesn’t try to be clever. It doesn’t pack in features or flex digital wizardry. It does one job, and it does it with the kind of unassuming elegance that makes you wonder why more companies don’t bother with simple solutions. While other brands chase modulation depth and algorithmic complexity, ADDAC quietly slipped in a module that actually improves your daily workflow—without costing you headroom, bandwidth, or brain space. And at just 3.5 cm deep, it’s skiff-friendly and plays nice in even the most tightly packed systems.
Specifications
| Manufacturer | ADDAC System |
| Production Years | 2020s |
| Original Price | 55.00 € (excluding VAT) |
| Format | Eurorack |
| Width | 4 HP |
| Depth | 3.5 cm |
| Power Requirements | Passive (no power draw) |
| Function | 3x 1/4" (6.35mm) to 3.5mm (1/8") jack adapter |
| Panel Options | Standard: Black, Red; Custom: Green, Blue, White, Silver Gray, Yellowed Silver, Dark/Light Bronze |
| Print Color Options | Black, White, Red, Yellow, Blue, Green (dependent on panel color) |
| Custom Panel Lead Time | 4 to 6 weeks |
| Weight | Not specified |
| Mounting Hardware | Standard M3 rack screws (not included) |
Key Features
A Passive Problem Solver
In a modular world obsessed with signal transformation, the ADDAC200S stands out by transforming nothing. It’s a pure mechanical interface—no resistors, no op-amps, no circuitry at all. That means zero noise, zero signal degradation, and zero power consumption. For players running low on +12V or chasing ultra-clean signal paths, this is a rare module that only adds convenience. The three independent jacks let you convert multiple full-size cables at once—perfect for interfacing guitar pedals, outboard gear, or studio monitors with your modular rig. No more crawling behind the rack to swap adapters or risking bent jacks from mismatched plugs.
Build and Customization
Like all ADDAC modules, the 200S feels solid and well-finished, with clean silkscreening and sturdy jacks. But the real charm lies in its customization options. While standard units ship with black or red panels, ADDAC offers a full range of custom colors—from bright yellowed silver to deep bronze—each with matching print color recommendations for optimal contrast. These aren’t just cosmetic tweaks; they let you color-code your utility modules or match your rack’s aesthetic without sacrificing function. The catch? Custom panels are made to order, with a 4–6 week turnaround and an added cost, so they’re not for the impatient. But for builders who treat their racks like instruments, not just collections, that personal touch is worth the wait.
Historical Context
The ADDAC200S emerged in the early 2020s, a period when Eurorack had fully matured into a hybrid ecosystem—part boutique analog craftsmanship, part digital experimentation. As more musicians integrated modular systems into live setups and hybrid studios, the friction between full-size and miniature connectors became impossible to ignore. While some manufacturers began including combo jacks or offering adapter kits, ADDAC was one of the first to treat the 1/4" to 3.5mm gap as a legitimate design challenge, not just a footnote. Positioned within the ADDAC200 Series—dedicated to analog CV utilities and practical rack helpers—the 200S reflects a philosophy that values usability as much as sonic innovation. It’s not flashy, but in a format where a single loose cable can derail a performance, it’s quietly revolutionary.
Collectibility & Value
The ADDAC200S isn’t a collector’s item in the traditional sense—no limited runs, no mythical circuitry, no resale markup. It’s a utilitarian module, and it’s priced that way. At €55 (around $60), it’s affordable even for beginners, and since it has no electronics, there’s nothing to fail. That said, well-maintained units with rare custom panels—especially full-color matches like blue with yellow print—do occasionally fetch a small premium among boutique rack builders who value aesthetics. The real value, though, is in convenience. Secondhand units pop up on Reverb and eBay at or below retail, and since there are no components to degrade, condition is rarely an issue. Just check that the jacks are snug and the panel isn’t cracked—common sense stuff. If you’re buying new, expect a wait for custom colors, but standard black or red models are usually in stock through ADDAC’s distributors.
eBay Listings
As an eBay Partner, we earn from qualifying purchases. This helps support our independent vintage technology research.