The Campfire Audio Bonneville builds on the brand’s extensive experience with hybrid IEMs. Its 10 mm dual-magnet dynamic driver is complemented by three high-performance balanced armature drivers: one dedicated to the midrange and two responsible for the high frequencies.

The bass reaches deep with satisfying texture and impact, the midrange is smooth and emotive, and the high frequencies shine with brilliant clarity. Bonneville combines technical capability with a lively, energetic, and musical presentation while maintaining high resolution and dynamic range.

Popular among Campfire Audio enthusiasts, the Dual-Magnet dynamic driver uses a large, powerful diaphragm to create rich, warm transients and exceptional texture.

The 10 mm driver delivers deep-reaching low frequencies while also contributing to a smooth and detailed upper range. Its distinctive, engaging character forms the foundation of Bonneville’s energetic and musical presentation.

A premium balanced armature driver handles the midrange, producing smooth, engaging vocals and mid frequencies. Its performance is fine-tuned through custom damping values and a precision-engineered tuning chamber.

Two premium high-frequency balanced armature drivers reproduce the treble with brilliant clarity and pristine detail.

Bonneville’s vented design balances air pressure and air volumes, enabling even diaphragm movement and maximizing the performance of the dynamic driver.

The pressure-control ventilation also helps reduce air pressure inside the ear canal.

The shape of Bonneville’s shell is based on an aggregate of numerous inner-ear impressions received by Campfire Audio for its custom-fit IEMs.

The engineering team then smoothed and refined this shape to create a secure semi-custom design that remains comfortable during hours of wear.

The hand-polished, mirror-finish stainless steel faceplate provides durable protection for the internal components while creating a striking contrast with the limited-edition white shell.

The stainless steel nozzle withstands impacts and repeated eartip changes, offering greater longevity than conventional plastic IEM nozzles.

Campfire Audio’s custom Matrix MMCX connectors provide a durable, long-lasting connection between the IEM and its cable.

Thanks to the detachable-cable design, the cable can be easily removed and replaced with another compatible cable whenever necessary.

Bonneville was designed and engineered from the ground up by Campfire Audio’s three-person engineering team at the company’s sole facility in the heart of Portland, Oregon.

Every Bonneville IEM is hand-assembled there by the manufacturer’s skilled production team. Each finished unit is tested, packed, and shipped from the same location.

Bonneville has a specified frequency response of 5 Hz to 20 kHz and an impedance of 29 Ω at 1 kHz. Its sound pressure level is 94 dB at 1 kHz with a 14.59 mVrms input signal, while total harmonic distortion remains below 1%.

The frequency response graph shows the IEM’s relative volume levels across the frequency spectrum. It provides useful guidance on the overall tuning but cannot represent technical performance characteristics such as detail, timbre, soundstage, or resolution.