ADDAC System ADDAC200S (2020s)
Three tiny jacks that solve one of Eurorack's most annoying little problems, without drawing a single volt from your power supply.
Overview
The ADDAC200S Size Matter won't warp your sound, sequence your drums, or generate any CV. It doesn't even draw power. What it does is let you plug in a full-sized 1/4" cable and route it to a 3.5mm (1/8") jack in your rack. It's a 4 HP passive adapter module with three individual 1/4" to 3.5mm converters mounted on a Eurorack-compatible panel. That gets rid of the tangle of inline adapters on your studio floor. No soldering, and no flimsy adapters getting yanked out mid-performance.
The ADDAC200S doesn't try to be clever. It has no features to speak of and no digital tricks. It does one job. While other brands chase modulation depth and algorithmic complexity, ADDAC made a module that improves your daily workflow without costing you headroom, bandwidth, or brain space. It's also just 3.5 cm deep, so it's skiff-friendly and fits in 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
The ADDAC200S transforms nothing. It's a pure mechanical interface with no resistors, no op-amps, no circuitry at all. That means zero noise, zero signal degradation, and zero power consumption. If you're running low on +12V or chasing ultra-clean signal paths, it only adds convenience. The three independent jacks let you convert multiple full-size cables at once, which suits guitar pedals, outboard gear, or studio monitors going into a 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. The customization options are the interesting part. Standard units ship with black or red panels, and ADDAC offers a full range of custom colors, from bright yellowed silver to deep bronze, each with matching print color recommendations for optimal contrast. You can use them to color-code your utility modules or match your rack's look. The catch is that custom panels are made to order, with a 4-6 week turnaround and an added cost.
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. There are no limited runs, no mythical circuitry, and 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. Units with rare custom panels, especially full-color matches like blue with yellow print, do occasionally fetch a small premium among boutique rack builders. Secondhand units show up on Reverb and eBay at or below retail, and since there are no components to degrade, condition is rarely an issue. Check that the jacks are snug and the panel isn't cracked. 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.