64 Audio Solo - Single Planar Magnetic Driver Universal IEM Earphones

Product variants

Key Features:

Planar magnetic driver delivers full-range sound with exceptional clarity
Helmholtz resonators enhance acoustic tuning and frequency balance
LID® technology ensures consistent sound across all devices
Apex® Core reduces pressure for greater comfort and immersive sound
Includes pure OCC copper eight-braid cable with 3.5mm and 4.4mm connectors

Manufacturer warranty: 12 months

Product Data:

MSRP	KSD SKU	Barcode	MPN
£1,399.00	P003600	850035627433	2600-2034

MSRP	£1,399.00
KSD SKU	P003600
Barcode	850035627433
MPN	2600-2034

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64 Audio Solo

64 Audio's Solo reimagines the standards of full-range sound in portable high-end audio, covering the entire sonic spectrum with a single planar driver. As the latest evolution in their legendary tia™ line, Solo takes inspiration from the pioneering design of Fourté, Trio, and Duo. To tackle the challenge of tuning a single driver, 64 Audio has paired a traditional electronic filter with the world's first Helmholtz resonator in an in-ear monitor (IEM).

The 14.2mm planar driver’s acoustic chamber features two precisely tuned Helmholtz resonators, sculpting its frequency response while incorporating 64 Audio's apex core design. This combination relieves pneumatic pressure and enhances spatial depth, delivering a remarkable listening experience. Additionally, with the patented LID technology, all innovations come together in one of 64 Audio’s most striking designs since Fourté in 2016. Solo offers the detailed transient response of planar technology, with an unexpectedly powerful low-end, delivering an unmatched sound signature.

As 64 Audio’s first single-driver UIEM, Solo opens up new possibilities in micro-acoustic design, proving that a single driver can deliver exceptional resolution and sound quality.

Hear every detail.

Planar Magnetic 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, we can reliably extract a true high-resolution full range sound from this single driver.

Helmholtz Resonators
Planar magnetic technology has been around in portable hi-fi for years, but 64 Audio wanted to unlock its full potential. To achieve this, they needed a slight reduction in high frequencies and attenuation of narrow frequency bands. While an electronic filter subtly adjusts the highs, 64 Audio incorporated two 3D-printed Helmholtz resonators into the Solo’s sound chamber. These resonators manipulate air resonance at specific frequencies, precisely amplifying or reducing targeted frequencies for optimal sound quality.

The Sound
64 Audio Solo upholds the brand's high standards of accuracy, musicality, and balance while introducing innovative speaker technology with a single planar driver per side. The planar driver delivers ultra-realistic sound by capturing subtle details and eliminating sharpness through acoustic notch filters. Combined with the Apex Core, it creates a wide soundstage with impactful bass and deep sub-bass, ensuring immersive listening, even in complex mixes.

Copper Eight-Braid Cable
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 0.26Ω impedance rating. Solo comes standard with two of these cables, one 3.5mm single-ended and one balanced 4.4mm.

LID®
Linear Impedance Design (LID) is a patented circuit that compensates for the non-linear electrical resistance resulting from Solo’s electronic shelf filter. Variations in source amplifier output impedance in devices like smartphones, body packs, DAC/amps, and DAPs typically lead to changes in frequency response. LID restores proper interaction with the source, preserving the intended sound signature and ensuring consistent, reliable performance.

Apex® Core
Adding to our list of innovations, we implement our patented pressure-relieving technology in the form of apex core, elevating this design to new levels of fidelity and spatial acuity. Because Solo’s acoustic chamber includes our integrated apex core technology, we achieve a similar fit and comfort to that of the Duo. The design offers just enough isolation to allow the listener to focus on the audio while feeling so unimpeded that you may initially wonder if you have a proper seal. This ensures hours of comfortable listening, made possible by our patented technology.