Advancing Planar Performance

Until recently, planar drivers were deemed unsuited for IEM applications; held back by size, sensitivity and cost limitations, they were long used in over-ear headphones. However, advancements in this technology have overcome these limitations enough for them to be used in portable, in-ear applications.

Now, the wonderful character and advantages of planar drivers can be brought to IEM lovers; with their unique blend of size and speed and accompanying unique sonic characteristics.

Campfire's first planar IEM, Supermoon's premium, planar sound quickly became a fan favorite and became one of the most renowned planar IEMs on the market. Moon Rover set a new standard for linearity and balance in Campfire's lineup. Now, Astrolith is the modern torch-bearer of Campfire's planar evolution.

Campfire's Planar Family

  • Astrolith

    Our all-new, top-of-the-line, dual-planar earphone. Astrolith features 14.2mm + 6mm planar magnetic drivers with newly engineered tuning elements and housing. Energetic, technical, and engaging.

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  • Moon Rover

    This limited edition model features a new, full-range, 12mm planar driver. Wrapped in a beautiful, flame-treated titanium housing. Moon Rover is for true lovers of a balanced, neutral sound signature.

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  • Supermoon

    Our renowned, first foray into planar earphones. Supermoon features a 14mm full-range driver. Available in both universal or custom fit. Supermoon is highly resolving, accurate, with a slight v-shape.

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Sculpting Sound: Campfire's Acoustic Engineering

  • Astrolith

  • Moon Rover

  • Supermoon

At Campfire Audio, our philosophy heavily revolves around driver quality and the acoustic treatment of these drivers. Counterintuitively, increased driver count doesn't always correlate with higher performance. Some may find they love the cohesive sound of single, full-range drivers, while others may prefer the strengths of different driver types to be segmented to different frequency bands.

Our focus revolves around finding high performing drivers with great raw metrics, and then using our years of experience and institutional knowledge to create tuning elements and driver treatments to highlight and bring out the best in these small, intricate, speakers.

We strive to create a wide spectrum of tunings, ergonomics, styles, and to implement new and interesting combinations of technologies. We hope to have one (or many) earphones to suit the wide range of tastes and preferences of HiFi ennthusiasts.

Pushing Boundaries: Advantages of Planar Magnetic Technology

Speed and Impulse Response

  • Planar drivers, despite the large size, are capable of moving incredibly fast. This speed creates a great deal of sharp detail and overall resolution, presenting your tracks with life-like realism and creating a vast canvas on which every layer and element of your music is displayed.

    Reflecting this driver's rapid, accurate movement is its outstanding impulse response -the ability of the driver to respond to signal and stop resulting movement quickly- allowing the driver to move from note to succeeding note without overlap or ‘smearing.’ 

  • Seen here, a comparison between the impulse response of Astrolith's 14.2mm planar magnetic driver and that of one of our most advanced dynamic drivers. Astrolith's rapid impulse response, refliected by the black curve, demonstrates this IEMs lightning fast signal production.

Even Diaphragm Movement

Planar driver’s serpentine voice coil is distributed evenly over the entire surface of the diaphragm which stimulates driver movement such that the driver does not warp or bend as it moves back and forth. This contributes to the drivers incredible accuracy and rapid impulse response, making each note tight and defined and avoiding smearing seen in other large, dynamic drivers. 

Coupling the speed and even movement of the drivers diaphragm enables Moon Rover to create incredibly accurate representations of the original sound.

Planar Wavefront

Another unique facet of planar performance is its propagation of a plane wavefront, contrasting with the spherical wavefront created by standard cone speakers/dynamic drivers.

The shape of a given wavefront will change the acoustic interaction with the ear canal, changing reflections and altering our perception. The unique wavefront of planar drivers contributes to the special timbre and character of Campfire’s planar IEMs.

Low Total Harmonic Distortion

Yet another advantage of planar technology is the incredibly low overall THD ratio. Campfire’s custom drivers already feature a very low distortion level, and our new planar drivers bring this number to an unbelievable new low.

Combined with the speed, precision, and even movement of the planar driver, this super low THD ratio adds another layer to the planar driver’s crisp, clean, and accurate sonic reproduction.

Experience the precision, resolution, speed, and impact of planar tech with Campfire Audio