Audien Atom X vs Cearvol Diamond X1
Side-by-side HearAdvisor lab results with SoundGrades, expert pick badges, and the same visualizations we use in product reviews.

Audien Atom X
The Audien Atom X is a budget OTC hearing aid priced at $389 that earns a B grade with a SoundScore of 3.3/5 in our lab testing. This visible-in-ear style device ranks #54 of 65 OTC hearing aids tested, placing it in the bottom portion of its category. In our testing, the Atom X shows a mixed performance profile with notable strengths and weaknesses. Music streaming quality is a standout, scoring 3.3/5—a solid result that sits 1.38 points above the category average. Feedback handling is excellent at 5.0/5, meaning users can expect stable performance without whistling issues. However, the core speech intelligibility metrics are where this device falls short: speech in quiet scores just 1.5/5 (1.25 points below the OTC average), and speech in noise scores 1.0/5 (0.48 points below average). Own-voice comfort is mixed at 2.3/5, slightly below the category norm. At this price point, several alternatives offer stronger overall performance. Devices like the Elehear Beyond (4.34/5) and Apple AirPods Pro 2 (4.04/5) score meaningfully higher in the same price range. For those prioritizing value, the JLab Hear OTC delivers a similar SoundScore of 3.54/5 at a lower price. The Atom X may appeal to users who prioritize music streaming quality and want simple rechargeable convenience, but those seeking improved speech clarity—especially in challenging listening environments—should consider higher-performing alternatives in this competitive OTC category.

Cearvol Diamond X1
The Cearvol Diamond X1 is a budget-priced OTC hearing aid that earned a B grade with a SoundScore of 3.7/5 in our lab testing, placing it in the top 45% of OTC devices. At $199, it represents an accessible entry point for those exploring hearing amplification. The Diamond X1's standout performance is in music streaming, scoring 4.1/5—a strong result that sits 2.18 points above the OTC category average. This makes it notably capable for users who prioritize audio entertainment through their hearing devices. Feedback handling is also excellent at 4.5/5, meaning users should experience minimal whistling during normal use. However, speech performance presents limitations. Speech in quiet scores a mixed 2.8/5, and speech in noise registers at 1.7/5. While both metrics technically sit above category averages (+0.03 and +0.22 points respectively), they remain low in absolute terms—important context for anyone prioritizing conversation clarity. Own-voice comfort is another weakness, scoring 1.7/5, which is 0.81 points below the category average and may affect how natural users sound to themselves. The Diamond X1 is best suited for budget-conscious consumers who value music streaming quality and aren't heavily reliant on challenging listening environments. Those who prioritize speech understanding in noise or natural own-voice perception may want to consider alternatives in this price range, such as the higher-scoring Elehear Beyond or Apple AirPods Pro 2.
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Performance metrics
Scale 1-5 (Tuned)
Lab metric by fit
Scale 1-5 (Tuned)
Speech level
Adjust input dB (Tuned)
Amplification (REIG)
Insertion gain at 65 dB (Tuned)
Fitting configuration for tuned fit