Campfire Audio
Fast and resolving
24K gold-plated screws
Musical presentation
Dual Balanced Armature


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Campfire Audio IO Earphones


The remarkable, refined IO (Eye-Oh) Earphones from Campfire Audio presents an all-new fun and engaging listening experience.

IO’s sound is fast and resolving, with a refined mid-range that complements extended high frequencies and articulate bass. The result is fidelity unmatched by any other in-ear monitor in its class.

Many more iterations and unique prototypes were made of IO than any other earphone in Campfire Audio’s line-up to date. It was a journey to fine-tune their sound and get it right. The result is an earphone that Campfire say can proudly stand next to their best-known models. They feel confident you will enjoy the result of their efforts.

Red Anodized Finish

Based on the classic Campfire Audio profile, IO features a Garnet Red anodized finish with 24K gold-plated screws. The stainless steel spout and machined aluminium body are paired with a custom beryllium / copper insulated round MMCX connector.

Each earphone is assembled by hand in the Campfire Audio workshop in Portland, Oregon by their team of highly skilled craftspeople.

Less Is More

Driver count has never been as important to the design of Campfire Audio products as the proper selection and implementation of particular drivers. When using more than a single driver, it is as much about the synergy between them as it is about any one particular driver unit.

Staying true to the Campfire Audio design philosophy – less is more – and using fewer, higher quality components is ideal to achieve a more a musical presentation.

IO came together by using an oversized woofer BA as a foundation, then pairing with a small tweeter. The Campfire Audio Tuned Acoustic Expansion Chamber (T.A.E.C.™) provides the natural and open top-end extension people have come to expect from their IEM earphones.

New Cable

Building from their silver-plated copper Litz wire conductors and popular tangle-resistant twisted cable weave, Campfire have added a new stylish Smoky jacket to compliment the unique finish of these new line of earphones. A new lightweight moulded ear-hook design replaces the memory wire. The result is a light cable that is a pleasure to use.

New Case

The standard leather earphone case gets an update to the exciting new premium Bordeaux leather protective zipper case. Luxurious leather surrounds a substantial and protective rubber barrier, ensuring your IO earphones will remain safe while in transit. The interior is a dense faux-wool lining that preserves the anodized finish of IO. Each case is made in Portugal by a small team of skilled craftspeople that share our commitment to quality.


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