Erica Synths Das Kleine Fusion
Experience the power of vacuum tube synthesis in a compact, affordable eurorack modular system. The Erica Synths Das Kleine Fusion delivers distinctive warmth and pressure for your sonic explorations, perfect for those who want serious, organic analog sounds without the bulk or cost of large systems.
Rich Analog Oscillators with Tube Crunch
Firstly, at the heart of this system are two Fusion VCO2 modules. These deliver fully analog sounds with three waveforms available simultaneously. Also, a transistor-based suboscillator and a detune function. Unique to this design, two BBD delay lines create a frequency shifter mixed back into the oscillator to mimic dual detuned oscillators.
Flexible, Soft Filtering and Advanced Modulation
Moreover, the Fusion VCF3 is a resonant 24dB/oct lowpass filter that blends vacuum tubes and vactrols for a uniquely soft and musical tone. Included is a CV recorder to capture the motion of the knob. Thus, letting you create intricate modulation patterns automatically. Complementing this is the Fusion Modulator, offering complex, all-analog control voltage generation. Enjoy looping envelopes, VCA, noise, and sample & hold.
Versatile Sound Shaping and Compact Design
Additionally, the Fusion VCA/Waveshaper/Ringmodulator module further expands sound design possibilities. There are two miniature pentodes working as a VCA, waveshaper and ring modulator. You can apply two CV inputs simultaneously, enabling audio-rate modulation and diverse sonic textures. All of this fits in an 84HP one-row skiff case equipped with a built-in power supply. Furthermore, it comes with 20 patch cables for endless routing options.
Key Features
- Two Fusion VCO2s with three waveforms, suboscillator, detune, and tube overdrive
- Fusion VCF3 24dB/oct resonant lowpass filter with vacuum tubes, vactrols, and CV recorder
- Fusion Modulator with looping envelope generators, VCA, Noise, and Sample&Hold
- Fusion VCA/Waveshaper/Ringmodulator with two CV inputs for rich modulation
- 84HP one-row skiff case with built-in power supply
- Includes 20 patch cables for flexible routing possibilities


