Campfire Audio is a company based in Portland, Oregon and they specialize in in-ear monitors (IEMs), headphones and cables. Their latest release is the Io. I would like to thank Campfire Audio for the review unit of the Io. At the moment, you can purchase the Io from Campfire Audio.



  • Driver Configuration: 2 Balanced Armature
  • Frequency Response: 5Hz – 22kHz
  • Sensitivity: 109 dB SPL/mW
  • Impedance: 26 Ohm @ 1kHz

Unboxing & Accessories

The Io comes in a squarish brown package with gold pattern and the package sports the brand name. A red wrapping paper is used to wrap the package and on the front, there is a red sticker and it sports the brand name, image of Io and model name. The package is made of USA made “French Paper Company” paper. After opening the package, there is a premium leather case which contains the Io and detachable MMCX cable. Each shell is protected inside a soft pouch that is divided into 2 sections. In the accessories box, there are Campfire Audio Marshmallow tips (S & L), silicone tips (S, M & L), Final E tips (XS, S, M, L & XL), cleaning tool and Campfire Audio pin. At the bottom of the package, there are warranty card and instruction manual.




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