No. Items in Caleb’s Collection are development-stage studio objects created during years of product development work with Campfire Audio. The units were used for listening tests, tuning sessions, or internal reference. Each unit is fully functional and is photographed individually to communicate the particular cosmetic condition of the units.

No. These are not standard retail releases, and they often differ from final-production models in materials, tuning, or cosmetic details. They do not have retail packaging, accessories, or manuals because they are not retail units.

Each listing is for the Earphones only.

• No cable, ear tips, manuals, or accessories are include with purchase.

This reflects the origin of these pieces as studio-development items rather than commercial products.

All earphones are compatible with a wide range of standard MMCX audio cables.

Yes. Each piece has been inspected for basic functionality prior to listing. They are sold as functional archival items.

Many items in this collection are unique prototypes, early samples, or small-run builds that were never sold publicly. Once sold, they are unavailable forever.

Caleb's Collection is a curated archive of studio-built prototypes and developmental earphones from Caleb Rosenau’s decade guiding product design and creative development at Campfire Audio.

No. Because these are non-retail and singular items, they are sold as-is. However, each one has been evaluated to ensure basic operation.

All sales are final due to the nature of one-of-a-kind objects.

Yes, all earphones listed use standard MMCX connectors.

All items ship from Portland, Oregon.