Sound Description

Redefining the meaning of "full-range sound" in portable high-end audio, 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 have introduced the world's first Helmholtz resonator in an IEM.

Delivering immersive sound and impeccable spatial imaging. Its articulate highs extend beautifully with a warm and engaging low-end response - just like its custom counterpart.

Driver Technology

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, combining the exceptionally detailed transient response of planar technology with an unexpectedly robust low-frequency presence.

Design and Construction

Offering reference-level detail, this IEM has become one of the most highly regarded and sought after audiophile UIEMs. Each ergonomic shell is machined out of a solid piece of aluminum and finished with an electroformed stainless steel faceplate chip.

Tubeless In-Ear Audio (tia) Technology

A patented IEM design methodology that aims to reduce unwanted resonance and distortion for a transparent and lifelike sound signature. The tia system is comprised of three major elements: open balanced armature tia drivers, the tia single-bore design, and tia acoustic chambers.

Air Pressure Exchange (Apex) Technology

A patented vent that releases air pressure in a sealed ear canal all while retaining standard IEM levels of isolation; enabling musicians and music enthusiasts to listen more comfortably for longer. This venting alleviates listener fatigue and allows for a much more realistic soundstage.

Linear Impedance Design (LID)

A patented circuit that corrects the non-linear electrical resistance of the multiple driver-sets. Varying source amplifier output impedance in devices typically results in varying frequency response. Restoring proper interaction with the source and preserving the desired sound signature enables a consistent reliable sound.