OLLO Audio

OLLO Audio is a Slovenian headphone maker based in Šempas. Founder Rok Gulič began experimenting with headphone prototypes in 2016, and the project grew into a company focused on reference headphones for recording, mixing and music production.

Built from a hands-on project

OLLO's official story describes its beginnings in a garage, where early headphones were made with basic tools and tested through repeated listening. The first experiments developed into a small business as friends asked for their own pairs. That practical origin remains part of the brand's approach to product design.

Headphones for studio work

The range includes open-back and closed-back models for different listening environments. S4X headphones are designed for mixing and production, while S4R is a closed-back option for monitoring and recording.

Calibration and listening

OLLO supplies headphone models with calibration information so users can understand their measured response. The products are intended for close listening during tasks such as editing, tracking and mixing. Open and closed designs offer different degrees of isolation and room awareness.

Repairable construction

The company says its headphones use replaceable parts and are designed to be dismantled and repaired. Materials include metal and wood, and OLLO offers a five-year warranty. Replaceable components can help extend the useful life of the headphones when a part wears out.

Made by a Slovenian company

OLLO Audio d.o.o. lists its company address in Šempas, Slovenia. Its focus remains on a small family of wired reference headphones rather than a broad consumer electronics catalog.