Solo In-Ear Monitors

Redefining the meaning of “full-range sound” in portable high-end audio, Solo expertly covers the entire sonic spectrum with a single planar driver. The final note in our 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. In addition to a traditional electronic filter that subtly shifts the tonal balance, we deploy a dual Helmholtz Resonator for precise tonal adjustments. The 14.2mm planar driver’s acoustic chamber integrates two Helmholtz resonators, meticulously tuned to acoustically sculpt its frequency response. This chamber is also engineered to include our apex core design, expertly relieving pneumatic pressure and enhancing the sense of physical space to a degree never before experienced in a single-driver IEM. Combined with our patented LID technology, all of these innovations are housed in our most striking design update since the introduction of Fourté in 2016. These elements unite to deliver a sound that is quintessentially 64 Audio, combining the exceptionally detailed transient response of planar technology with an unexpectedly robust low-frequency presence. As our first single-driver UIEM, Solo achieves what Fourté did in 2016 when we simultaneously unveiled the world’s first 18-driver IEM and offered a four-driver alternative that arguably provided more sonic resolution. By accomplishing this with a single driver, we open a new realm of possibilities in micro-acoustic design.