At Campfire Audio, our philosophy regarding driver treatment informs a considered approach that emphasizes quality over quantity. In the arms-race to fit a higher and higher number of drivers into an earphone, we find that a results-driven technique to driver treatment produces superior results with less room for pitfalls and ever-expanding variables that can undermine product consistency. 

One of the products of this approach is our Phase Harmony Engineering, that allows us to segment the frequency spectrum and assign these segments to specific drivers, and allows those drivers to apply their strengths to that area. But it doesn’t end there, using a combination of precision engineered driver housings and shell geometry, coupled with custom damping values we are able to physically shape the tuning and response of the drivers, and further, their interaction with one another. This driver-to-driver interaction is crucial to eliminating points of potential phase cancellation and creating the intangibles that don’t show on a frequency response curve; imaging, separation, resolution, and soundstage. 

Campfire Audio was a leader in the shift away from the traditional, rubber tube ,routing style of driver implementation, removing the hose-style tubes routing driver openings to the nozzle of the earphone and applying custom engineered tuning chambers each driver to shape frequency response and technical performance.

TAEC is one of Campfire's longest standing patented technologies and is utilized across a wide range of models. This precision engineered chamber is applied to high-frequency drivers to create increased sense of space, detail, and resolution.

Seen in our custom in-ear monitors, Chromatic Series, and other IEMs using our Aggregated Ear-shape housing, Our solid body design embeds drivers' tuning chambers directly into the 'solid body' of the IEM, rather than having an external shell with an 'engine block' style set of drivers and chambers installed. This creates fewer points of connection and a highly durable form that has decreased variables for greater build consistency.

The AAOI housing is a precision engineered, 3D printed housing with built in acoustic tuning elements. This housing is used in both Astrolith and Grand Luna, designed for use with their respective, 14mm planar magnetic drivers. These are internally dyed and externally transparent, which reveals the earphones inner-working in an appealing, stylized fashion.

The Particle Phase Resonator is a specially designed tuning element that shapes Astrolith's unique, hyper-compact, 6mm planar magnetic driver. This driver creates blistering speed and high frequency response; by applying PPR, this driver is appropriately tamed while still allowing it to flourish.

A unique, central, tuning chamber developed for Trifecta's unique driver configuration. This chamber blends Trifecta's three, full-range, 10mm dynamic drivers into a cohesive force. Seamlessly blending the inward facing drivers was a unique engineering challenge and the resulting solution contributes to Trifecta's powerful and unique sound signature.

Combining the many inner-ear impressions we've received for custom-fit IEMs, this housing shape, seen in the Chromatic Series and Clara, creates an average earshape that provides a semi-custom fit that is highly contoured and ergonomic.