Solo vs A2e: Which 64 Audio IEM Fits Your Needs
By 64 Audio - In-Ear Monitors | Published: 2026-10-18
Category: Comparisons
Compare the 64 Audio Solo and A2e in-ear monitors: planar-magnetic vs custom stage design, sound signature, fit, and price trade-offs to help you decide.
Quick answer
Choose the 64 Audio Solo if you want a universal-fit planar-magnetic IEM for critical listening and high-resolution audio. Choose the 64 Audio A2e if you need a custom-molded stage monitor with multiple configuration options for live performance. The Solo delivers a unique planar driver sound, while the A2e prioritizes fit and stage reliability.
Driver technology and sound signature
The Solo uses a single planar-magnetic driver, a design that audiophiles often associate with fast transient response and low distortion. 64 Audio enhances this with a Dual Helmholtz Resonator built into the driver’s acoustic chamber to target problematic frequencies. This makes the Solo a strong choice for analytical listening where detail retrieval matters.
The A2e is part of the Stage Collection and is built for on-stage monitoring. While its driver configuration is not specified in the catalog, its purpose is clear: delivering a reliable, clear monitor mix in a custom shell. If you prioritize sound isolation and a secure fit over driver novelty, the A2e may serve you better.
Fit and customization options
The A2e is a custom product available in multiple price variants, meaning you can choose different configuration options within the A2e line. This allows for a personalized fit that can improve comfort and isolation during long performances. The Solo is a universal-fit IEM, so it uses standard ear tips and is ready to use out of the box with no waiting for impressions.
If you perform regularly and need a monitor that stays put, the custom A2e is likely the better choice. If you want to try a planar-magnetic IEM without committing to a custom mold, the Solo is more accessible.
Price and value
The Solo is priced at USD 1,049.25 (down from USD 1,399.00), placing it in the higher mid-range for universal IEMs. The A2e starts at USD 406.26 (down from USD 549.00) but can increase depending on the configuration options you select. The Solo’s price reflects its planar driver and premium build, while the A2e’s base price is lower but may rise with custom options.
If your budget is flexible and you want a unique driver technology, the Solo offers a distinct listening experience. If you need a cost-effective custom monitor, the A2e provides a solid foundation with room to tailor the fit and features.
Trade-offs to consider
- Sound signature: The Solo offers a planar-magnetic sound with fast transients and a tuned resonator for smooth treble. The A2e focuses on clear, reliable stage monitoring without the planar driver’s character. Choose Solo for analytical listening; choose A2e for stage clarity.
- Fit and isolation: The A2e is custom-molded for your ears, providing superior isolation and comfort for long sessions. The Solo is universal-fit and uses standard ear tips, which may not seal as well for everyone. Custom A2e wins for fit; Solo wins for convenience.
- Price flexibility: The Solo has a fixed price of USD 1,049.25. The A2e starts lower at USD 406.26 but can increase with configuration options, making it more adaptable to different budgets. A2e offers a lower entry point; Solo is a fixed premium.
Product facts at a glance
- Solo: Single planar-magnetic driver in-ear monitors for audiophiles and high-end audio enthusiasts. Solo's utilization of the planar transducer is further elevated by our unique implementation of a Dual Helmholtz Resonator built into the drivers' acoustic chamber; precisely targeting problematic frequencies. It's bold cosmetic look as well as two pure copper cables set it apart from any planar UIEM on the market. The planar driver and resonator design aim to reduce distortion and smooth out frequency peaks, making the Solo suitable for critical listening where accuracy matters.
- A2e: The 64 Audio A2e is part of the Stage Collection and is offered as a custom product. It is available in multiple price variants, giving buyers a range of configuration options within the A2e line. The custom fit and configurable options let you tailor the A2e to your ear shape and performance needs, which can improve isolation and comfort on stage.
Which one fits you?
Best for
- Audiophiles and home listeners who want a planar-magnetic IEM with a unique sound signature
- Performers who need a custom-molded stage monitor with configurable options for a secure fit
Not for
- Those who need a universal-fit IEM and prefer not to go through the custom molding process (choose Solo instead)
- Listeners on a tight budget who want a high-end planar driver (the A2e is not planar; consider the Solo if you can stretch)
