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Product Description

Line Circle
The 64 Audio Solo is a revolutionary universal-fit IEM featuring a 14.2mm planar magnetic driver for full-range, high-resolution audio. With apex® core, dual Helmholtz Resonators, and LID™, it offers superior comfort and consistent sound across devices. Designed for audiophiles who demand precision, depth, and innovation in a single-driver configuration.
Get the Details

Features & Specs Line Circle

Planar Magnetic Driver
14.2mm driver delivers full-range clarity and exceptional transient detail
Dual Helmholtz Resonators
Fine-tuned acoustic shaping for precise frequency control
Complete Fit Kit
Foam, SpinFit, and silicone tips included for perfect fit and seal
Precision Machined Shells
Durable T6061 aluminum housing with copper faceplate
tia™ Single-Bore
Tubeless design reduces distortion and enhances transparency
Premium Cables
Includes two OCC copper eight-braid cables (3.5mm & 4.4mm)
Planar Magnetic Driver
14.2mm driver delivers full-range clarity and exceptional transient detail
Dual Helmholtz Resonators
Fine-tuned acoustic shaping for precise frequency control
Complete Fit Kit
Foam, SpinFit, and silicone tips included for perfect fit and seal
Precision Machined Shells
Durable T6061 aluminum housing with copper faceplate
tia™ Single-Bore
Tubeless design reduces distortion and enhances transparency
Premium Cables
Includes two OCC copper eight-braid cables (3.5mm & 4.4mm)

Expert Insight

Line Circle

Solo is unlike anything I’ve heard before. The level of clarity, spatial detail, and low-end depth from a single planar driver is phenomenal. It's immersive, non-fatiguing, and beautifully tuned—I could listen for hours.

Expert Img
Dylan Crane
Brand Manager

Details

Line Circle

64 Audio Solo Universal Planar Magnetic IEM

The 64 Audio Solo redefines what’s possible from a single driver in a universal in-ear monitor. Crafted around a cutting-edge 14.2mm planar magnetic driver, Solo delivers true full-range sound with exceptional clarity, impact, and texture. This IEM merges modern innovation with classical acoustic techniques—like dual Helmholtz Resonators and apex® core pressure relief—to create a highly refined, immersive listening experience. Enhanced with patented LID™ (Linear Impedance Design) and tia™ single-bore architecture, Solo maintains tonal accuracy across sources while maximizing detail, realism, and spatial presentation. Finished with precision-machined aluminum shells and paired with two premium copper eight-braid cables, the Solo stands as a monumental evolution in planar IEM performance.

Specifications

  • Driver Configuration: 14.2mm Planar Magnetic Driver
  • Frequency Response: 20 Hz – 20 kHz
  • Sensitivity: 100 dB/mW @ 1 kHz
  • Impedance: 16 Ω
  • Isolation: -12 dB
  • Shell Material: T6061 Aluminum with Copper Mesh Faceplate
  • Color: Black
  • Cables: 3.5mm & 4.4mm Copper Eight-Braid Cables (25 AWG + 23 wires, 0.26 Ω)
  • Included Accessories: Carry Case, TrueFidelity Foam Tips (S/M/L), SpinFit Silicone Tips (S/M/L), Standard Silicone Tips (S/M/L), Shirt Clip, Cleaning Tool, Cloth, Round Sticker
  • Technology: tia™ Single-Bore, apex® core, Dual Helmholtz Resonators, LID™
  • Fit: Universal
  • Designed & Assembled: In the USA with globally sourced components

Expanded Key Features List

  • Planar Magnetic Precision: 14.2mm driver delivers rich full-range sound with fast transient response and ultra-low distortion.
  • Dual Helmholtz Resonators: Acoustically tune and refine the frequency response by eliminating unwanted peaks and harshness.
  • apex® core Pressure Relief: Minimizes pneumatic pressure for improved comfort, reduced ear fatigue, and an enhanced soundstage.
  • LID™ Technology: Maintains consistent sound signature across various sources regardless of output impedance.
  • tia™ Single-Bore Design: Reduces resonance and enhances transparency with direct sound delivery through a tubeless design.
  • OCC Copper Eight-Braid Cable: High-conductivity pure copper wire in 3.5mm and 4.4mm configurations with ultra-low impedance.
  • Elegant and Durable Build: CNC-machined T6061 aluminum shells with copper mesh faceplates combine beauty and ruggedness.
  • Immersive Bass and Detail: Substantial low-end impact and micro-detail retrieval rivaling multi-driver configurations.

Q&A Section

Q: What makes the 64 Audio Solo different from other IEMs?
A: Unlike traditional multi-driver IEMs, Solo uses a single 14.2mm planar magnetic driver paired with innovative acoustic and electronic technologies to deliver full-range sound with stunning clarity and natural tonal balance.

Q: Does Solo provide strong bass even with just one driver?
A: Yes, thanks to its specially tuned acoustic chamber and Helmholtz Resonators, Solo offers deep sub-bass and impactful low frequencies without muddying the mids or highs.

Q: Can I use the Solo with my smartphone or DAP?
A: Absolutely. With LID™ technology, Solo ensures a consistent sound signature across devices with different output impedances, including smartphones, DACs, and amplifiers.

Q: What is the purpose of apex® core?
A: apex® core relieves inner-ear pressure for more comfortable long-term listening and creates a wider, more natural soundstage.

Q: Are different cables included?
A: Yes, Solo comes with two OCC copper eight-braid cables: one single-ended 3.5mm and one balanced 4.4mm, both designed for low resistance and optimal sound.

Q: How isolating are these IEMs?
A: Solo offers -12 dB of passive noise isolation—enough to reduce ambient noise while maintaining an open and natural listening experience.

Q: What ear tips are included with the Solo?
A: You get a complete fit kit: TrueFidelity foam tips, SpinFit silicone tips, and standard silicone tips—all in sizes S, M, and L.

Q: Is the Solo comfortable for extended listening sessions?
A: Yes, Solo’s pressure-relieving apex® core design and ergonomic fit ensure all-day comfort with reduced ear fatigue.

Reviews

Line Circle
Product Descriptiondown arrow

Product Description

Line Circle
The 64 Audio Solo is a revolutionary universal-fit IEM featuring a 14.2mm planar magnetic driver for full-range, high-resolution audio. With apex® core, dual Helmholtz Resonators, and LID™, it offers superior comfort and consistent sound across devices. Designed for audiophiles who demand precision, depth, and innovation in a single-driver configuration.
Get the Details
Features & Specsdown arrow

Features & Specs Line Circle

Planar Magnetic Driver
14.2mm driver delivers full-range clarity and exceptional transient detail
Dual Helmholtz Resonators
Fine-tuned acoustic shaping for precise frequency control
Complete Fit Kit
Foam, SpinFit, and silicone tips included for perfect fit and seal
Precision Machined Shells
Durable T6061 aluminum housing with copper faceplate
tia™ Single-Bore
Tubeless design reduces distortion and enhances transparency
Premium Cables
Includes two OCC copper eight-braid cables (3.5mm & 4.4mm)
Planar Magnetic Driver
14.2mm driver delivers full-range clarity and exceptional transient detail
Dual Helmholtz Resonators
Fine-tuned acoustic shaping for precise frequency control
Complete Fit Kit
Foam, SpinFit, and silicone tips included for perfect fit and seal
Precision Machined Shells
Durable T6061 aluminum housing with copper faceplate
tia™ Single-Bore
Tubeless design reduces distortion and enhances transparency
Premium Cables
Includes two OCC copper eight-braid cables (3.5mm & 4.4mm)
Expert Insightdown arrow

Expert Insight

Line Circle

Solo is unlike anything I’ve heard before. The level of clarity, spatial detail, and low-end depth from a single planar driver is phenomenal. It's immersive, non-fatiguing, and beautifully tuned—I could listen for hours.

Expert Img
Dylan Crane
Brand Manager
Detailsdown arrow

Details

Line Circle

64 Audio Solo Universal Planar Magnetic IEM

The 64 Audio Solo redefines what’s possible from a single driver in a universal in-ear monitor. Crafted around a cutting-edge 14.2mm planar magnetic driver, Solo delivers true full-range sound with exceptional clarity, impact, and texture. This IEM merges modern innovation with classical acoustic techniques—like dual Helmholtz Resonators and apex® core pressure relief—to create a highly refined, immersive listening experience. Enhanced with patented LID™ (Linear Impedance Design) and tia™ single-bore architecture, Solo maintains tonal accuracy across sources while maximizing detail, realism, and spatial presentation. Finished with precision-machined aluminum shells and paired with two premium copper eight-braid cables, the Solo stands as a monumental evolution in planar IEM performance.

Specifications

  • Driver Configuration: 14.2mm Planar Magnetic Driver
  • Frequency Response: 20 Hz – 20 kHz
  • Sensitivity: 100 dB/mW @ 1 kHz
  • Impedance: 16 Ω
  • Isolation: -12 dB
  • Shell Material: T6061 Aluminum with Copper Mesh Faceplate
  • Color: Black
  • Cables: 3.5mm & 4.4mm Copper Eight-Braid Cables (25 AWG + 23 wires, 0.26 Ω)
  • Included Accessories: Carry Case, TrueFidelity Foam Tips (S/M/L), SpinFit Silicone Tips (S/M/L), Standard Silicone Tips (S/M/L), Shirt Clip, Cleaning Tool, Cloth, Round Sticker
  • Technology: tia™ Single-Bore, apex® core, Dual Helmholtz Resonators, LID™
  • Fit: Universal
  • Designed & Assembled: In the USA with globally sourced components

Expanded Key Features List

  • Planar Magnetic Precision: 14.2mm driver delivers rich full-range sound with fast transient response and ultra-low distortion.
  • Dual Helmholtz Resonators: Acoustically tune and refine the frequency response by eliminating unwanted peaks and harshness.
  • apex® core Pressure Relief: Minimizes pneumatic pressure for improved comfort, reduced ear fatigue, and an enhanced soundstage.
  • LID™ Technology: Maintains consistent sound signature across various sources regardless of output impedance.
  • tia™ Single-Bore Design: Reduces resonance and enhances transparency with direct sound delivery through a tubeless design.
  • OCC Copper Eight-Braid Cable: High-conductivity pure copper wire in 3.5mm and 4.4mm configurations with ultra-low impedance.
  • Elegant and Durable Build: CNC-machined T6061 aluminum shells with copper mesh faceplates combine beauty and ruggedness.
  • Immersive Bass and Detail: Substantial low-end impact and micro-detail retrieval rivaling multi-driver configurations.

Q&A Section

Q: What makes the 64 Audio Solo different from other IEMs?
A: Unlike traditional multi-driver IEMs, Solo uses a single 14.2mm planar magnetic driver paired with innovative acoustic and electronic technologies to deliver full-range sound with stunning clarity and natural tonal balance.

Q: Does Solo provide strong bass even with just one driver?
A: Yes, thanks to its specially tuned acoustic chamber and Helmholtz Resonators, Solo offers deep sub-bass and impactful low frequencies without muddying the mids or highs.

Q: Can I use the Solo with my smartphone or DAP?
A: Absolutely. With LID™ technology, Solo ensures a consistent sound signature across devices with different output impedances, including smartphones, DACs, and amplifiers.

Q: What is the purpose of apex® core?
A: apex® core relieves inner-ear pressure for more comfortable long-term listening and creates a wider, more natural soundstage.

Q: Are different cables included?
A: Yes, Solo comes with two OCC copper eight-braid cables: one single-ended 3.5mm and one balanced 4.4mm, both designed for low resistance and optimal sound.

Q: How isolating are these IEMs?
A: Solo offers -12 dB of passive noise isolation—enough to reduce ambient noise while maintaining an open and natural listening experience.

Q: What ear tips are included with the Solo?
A: You get a complete fit kit: TrueFidelity foam tips, SpinFit silicone tips, and standard silicone tips—all in sizes S, M, and L.

Q: Is the Solo comfortable for extended listening sessions?
A: Yes, Solo’s pressure-relieving apex® core design and ergonomic fit ensure all-day comfort with reduced ear fatigue.

Reviewsdown arrow

Reviews

Line Circle
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