Eternal Engine

Eternal Engine crafts limited-edition synthesizers featuring fully tube-based audio paths inspired by early 20th-century circuitry, controlled by modern ARM processors for precise performance. They first introduced the Apparatus, the pioneering duophonic tube synthesizer, hand-assembled in small quantities. Building on this foundation, their flagship MARS delivers four-voice polyphonic synthesis with R-2R DAC oscillators, voltage-controlled tube filters, and versatile modulation, marking the world's first polyphonic vacuum tube synthesizer now available for shipping.