About the Collection
Caleb’s Collection is a curated archive of studio-built earphones and developmental prototypes. It offers a direct look into the creative and technical work behind modern high-fidelity in-ear monitors, drawn from more than a decade of product exploration with Campfire Audio.
Unlike standard retail releases, these pieces come from internal stages of development where ideas are tested, refined, and sometimes set aside long before reaching the public. The collection includes early tuning samples, material studies, small-batch housings, color trials, and transitional designs that mark key moments in the evolution of several well-known models. Some items are singular artifacts; others reflect alternate paths briefly considered during development.
Each piece has been inspected for basic functionality and is presented as a functional archival object—a material record of the design and engineering work that informs contemporary earphone design.
About Caleb
Across more than a decade at Campfire Audio, Caleb Rosenau played a central role in shaping the company’s design language and identity, contributing to creative direction, industrial design, brand development, packaging systems, product strategy, and acoustic exploration. The objects gathered here form his personal archive from that era, preserved for the insight they offer into process, materiality, and the progression of the craft.
Caleb concluded his role with Campfire Audio in 2025 and sold his ownership that year. These pieces reflect his earlier work guiding design within the company. He now leads a new studio practice, building a portfolio of projects with a continuing focus on design and craft.
This collection is not affiliated with Campfire Audio; it is a personal archive of studio-built developmental objects retained across years of experimentation and iterative work.
Why Release the Collection Now?
As Caleb moves into new creative ventures beyond his work with Campfire Audio, he is opening this archive for the first time to share with fans, collectors, and personal-audio enthusiasts. Each object represents a piece of audio-design history and a glimpse into the ideas and experiments that shaped the company’s work during a formative era in the personal-audio market.
Acquiring an item from Caleb’s Collection offers something uncommon: clear provenance, a place within the lineage of modern earphone design, and a direct connection to the creative process behind it.
Disclaimer
Each item in Caleb’s Collection is a singular, individually photographed unit: what you see is exactly what you will receive. These are functional archival objects, not retail products. The condition of all earphones offered as part of the collection is used. Every unit has been inspected and tested for basic functionality.
Because these pieces originate from developmental and pre-retail stages, frequency response and tuning may differ from standard retail models. This variance is part of their provenance and appeal, offering collectors a direct link to the ideas, materials, and acoustic paths explored during product development.
No standard product warranty is available. Items are sold as-is, with their individuality and history as defining features.