Erica Synths‘ Konstrukt-8 was conceived as a build-it-yourself project, an extension of the EDU teaching series co-designed with Moritz Klein. Now it takes a step further: the Latvian maker offers a pre-assembled version, ready to play straight out of the box. A good moment to look closely at a drum machine that resembles no other, because it is not a sealed unit but a small modular system dressed as a groovebox.
Eight modules, one machine
The number in the name says it all: the Konstrukt-8 is built from eight Eurorack modules gathered into a single unit. Erica Synths embraces a radical philosophy: one control per function, no menus, no presets, no shared knob to reassign. Every parameter has its own front-panel control, and every voice gets its own sequencer channel. This is the opposite of the screen-driven groovebox: here everything is set by hand, live, and the instrument invites tweaking rather than navigating.
Four analog voices, one of them FM
For sounds, the machine lines up four analog voices: kick, snare, hi-hat and an FM percussion voice that clearly widens the palette toward metallic timbres and synthetic toms. Because each voice is a real analog circuit with its own controls, you shape attack, pitch and colour directly, with no software layer in between. It is the classic analog playground: round kicks, snappy claps and a hi-hat you dial in by knob. To understand what happens under the controls, our guide to subtractive synthesis sheds light on the oscillator-filter-envelope logic at work in each voice.
Built-in sequencer, mixer and effects
The Konstrukt-8 does not just make sounds: it arranges them. A four-channel sequencer drives the voices, an internal mixer balances them, and the machine carries a BBD delay and a compressor to add grit and glue. You get a complete chain, from pattern to output bus, in a compact format. And since these are Eurorack modules, nothing stops you patching with an existing system or borrowing ideas from neighbours like the Doepfer A-198-2.
In kit form or fully built
That is the whole point of the range: the Konstrukt-8 comes as a DIY kit, from around 490 euros, designed to learn by soldering — each module has its build guide and can even be tested on a breadboard before final assembly. Erica Synths rates the job as intermediate. For those who want the result without the soldering iron, the new assembled version at around 520 euros removes the last barrier. Either way, you walk off with a real analog drum machine, not a simulation. Other hybrid takes, such as Polyend Drums, show just how lively the genre is right now.
The specs that matter
| Item | Detail |
|---|---|
| Architecture | 8 Eurorack modules, one control per function |
| Voices | kick, snare, hi-hat, FM percussion |
| Sequencer | 4 channels, one per voice |
| Processing | mixer, BBD delay, compressor |
| Availability | DIY kit (from ~490 euros) and assembled version (~520 euros) |
Full details are on Erica Synths’ website.
My take
The Konstrukt-8 has a real point of view: making analog and modular tangible, knob by knob, with no screen to get in the way. The FM voice among the three classics is a smart move, dodging the me-too 909 kit and reaching for more personal timbres. The assembled version is today’s good news: it opens the door to everyone the soldering iron put off. At 520 euros you pay for an instrument that teaches as much as it plays — and because it is Eurorack, it will grow with your system instead of ending up in a drawer.
