Campfire Audio IO IEM

Combining fidelity and accessibility, Campfire Audio has created a class-leading IEM engineered for everyday use. It’s called the IO—and it’s a testament to the brand’s simple yet refined design ethos. Inside, each earphone features a large balanced armature acting as a woofer and a smaller balanced armature taking on tweeter responsibilities. Custom-tuned by Campfire Audio, the drivers work in harmony with the company’s Tuned Acoustic Expansion Chamber (T.A.E.C.™) to provide natural and open top-end extension listeners have come to expect from Campfire Audio earphones. Completing the IO, garnet-red machined aluminum housings with gold-plated screws, stainless steel nozzles, and custom beryllium-and-copper-insulated ports ensure excellent durability and signal transmission. 

Attention to detail: it’s a quality that defines most audiophile listeners. At Campfire Audio, it defines the audiophile builders, too. Founded by Ken Ball—owner and founder of cable- and DAC-manufacturer Audio Line Out—Campfire Audio creates innovative earphones with patented technologies and world-class performance. Powered by a small team of highly skilled craftspeople, the brand continuously experiments with materials and techniques to push the boundaries of the listening experience. Based in Portland, Oregon, the Campfire Audio team designs and assembles everything by hand. Each earphone is the culmination of countless iterations, hours of listening, and rigorous performance testing. It’s an audiophile-approved standard of quality—with results that sound the part.