64 Audio Solo

64 Audio Solo expertly covers the entire sonic spectrum with a single planar driver. The final note in their legendary tia™ line of UIEMs has been years in the making. Staying true to the tech-disruptive legacy of Fourté, Trio, and Duo, we looked to the past for innovative solutions to the modern challenge of tuning a single driver. 64 Audio Solo is redefining the meaning of “full-range sound” in portable high-end audio. Solo expertly covers the entire sonic spectrum with a single planar driver and is the final note in 64 Audio's legendary tia™ line of Universal IEMs has been years in the making. Staying true to the tech-disruptive legacy of Fourté and Trio, they looked to the past for innovative solutions to the modern challenge of tuning a single driver. In addition to a traditional electronic filter that subtly shifts the tonal balance, a dual Helmholtz Resonator has been deployed for precise tonal adjustments.

64 Audio Solo Sound

The agile performance expected of a planar driver achieves maximum realism by extracting subtle details in the music. These transients emerge from the mix, seamlessly keeping pace with your focus on the primary elements of the song. Our acoustic notch filters are strategically placed to eliminate sharpness without compromising driver performance. Apex core assists the high-mid and high frequencies in creating a vast sonic landscape, even in very complex mixes. Alongside this realism comes a tactile immersion in the textures of instruments and even the sonic characteristics of the recording equipment used in your favorite tracks. By intentionally shaping the overall response of Solo, we achieve a bass that has substantial impact and deep sub-bass presence.

64 Audio Solo Technology

Planar Driver The planar magnetic driver features a flat diaphragm with embedded conductors suspended between two sets of magnets, unlike traditional dynamic drivers that utilize a conical diaphragm driven by a voice coil. Because the entire diaphragm moves uniformly due to the planar magnetic field, we can deliver the detail and micro-transient information that would typically require a dedicated high- frequency driver. Since the diaphragm isn’t driven by a voice coil attached to a cone, which can cause uneven movement, it can reliably extract a true high-resolution full range sound from this single driver. Helmholtz Resonator While planar magnetic technology has been present in portable hi-fi for many years, 64 Audio wanted to truly showcase its potential in their products. To offer a new perspective on this technology, they needed a combination of a slight but broad reduction in high-frequency amplitude and the attenuation of a few very narrow frequency bands. As the electronic filter acts as a very subtle reductive shelf, they had to think creatively to effectively control some problematic frequencies. For this, 64 Audio drew on years of research into Helmholtz Resonators, an acoustic device from the mid-19th century. The two micro-cavities, 3D printed into Solo’s sound chamber, operate by forcing air in and out, causing the air inside to resonate at a specific frequency. By precisely determining the dimensions of the cavity and its neck, we can target a very narrow resonant frequency to amplify or diminish.

Copper 8 Braid Cable

64 Audio Solo is being paired with our first pure copper cable. The OCC Copper, which is 23 x 25 AWG Wires, is built into eight-braids with a pleasant tactile feel as well as an impressively low 0.26Ωimpedance rating. Solo comes standard with two of these cables, one 3.5mm single-ended and one balanced 4.4mm.