Cearvol Diamond X1 vs Starkey Edge AI RIC
Side-by-side HearAdvisor lab results with SoundGrades, expert pick badges, and the same visualizations we use in product reviews.

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.
Choice

Starkey Edge AI RIC
The Starkey Edge AI RIC is a premium prescription hearing aid released in 2024, priced at $5,000 and earning an A grade with a SoundScore of 4.3/5 in our lab testing. This behind-the-ear device ranks #20 of 39 prescription hearing aids tested, placing it in the top 49% of its category. In our testing, the Edge AI RIC demonstrates notable strengths in speech clarity and music streaming. Speech in quiet scores a strong 4.1/5, measuring +0.68 points above the category average. Music streaming stands out at 3.8/5, a solid score that sits +1.04 points above what we typically see in prescription devices—making it a compelling choice for users who value phone audio quality. Speech in noise scores 2.6/5, which is above the category average by +0.54 points but remains mixed in absolute terms. Feedback handling is excellent at 4.7/5, though this sits just below the category average of 4.72/5. Own-voice comfort scores 2.8/5, slightly above average but mixed overall—something to consider if own-voice naturalness is a priority. The device showed meaningful improvement from tuning: the normalized Initial Score of 4.2/5 rose to 4.7/5 after professional fitting, a +0.5 point gain. As a 2024 Expert's Choice Award winner, the Edge AI RIC offers strong everyday speech performance and standout streaming capabilities. However, buyers in this premium price tier should note that several competitors—including the Phonak Sphere Infinio and Oticon Intent—achieve higher overall scores. The Edge AI RIC is best suited for users who prioritize music streaming quality and strong speech clarity in quieter environments.
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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