OLLO Audio is a boutique, Alps-based headphone manufacturer dedicated to one goal: giving audio professionals a truly honest listening experience. Every pair is hand-built with a flat, uncoloured frequency response designed specifically for mixing, mastering, and critical listening — eliminating the guesswork of translating mixes across different playback systems. Trusted by a growing roster of Grammy-winning producers, mix engineers, and sound designers who’ve worked with artists such as U2, Beyoncé, Kylie Minogue, Foo Fighters, and Nick Cave, OLLO headphones are praised for their revealing detail, all-day comfort, and studio-monitor-like accuracy. Backed by a 5-year limited warranty and a strong “trusted by professionals” reputation, OLLO combines boutique craftsmanship with the reliability serious studios demand.