TUMBRINK
Work04Machine · 2026in development

Concrete Reference Speakers

High-end active monitors with cast concrete baffles.

A pair of reference-grade active loudspeakers built around Purifi woofers, Satori midranges, and beryllium tweeters, driven by Hypex FA253 DSP amplifiers.

The front baffles are cast from solid concrete in a half-ellipsoid form — mass and geometry doing the work that cabinets usually fake with damping material.