Cearvol Diamond X1 vs Signia Active Pro IX
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 available for $199, earning a B grade with a SoundScore of 3.7/5 in our lab testing. This visible-in-ear style device ranks #30 among 65 OTC hearing aids tested, placing it in the top 45% of its category. The Diamond X1 delivers a mixed performance profile with one notable strength: music streaming. With a score of 4.1/5, it performs 2.18 points above the category average—a substantial margin that makes it appealing for users who value audio entertainment through their hearing aids. Feedback handling is excellent at 4.5/5, providing stable performance during typical daily movements. Both iPhone and Android streaming are supported with rechargeable batteries for convenience. Speech performance presents a more modest picture. Speech in quiet scores 2.8/5, which is above the category average but only mixed in absolute terms. Speech in noise measures 1.7/5—above the category average of 1.48/5, though still low overall. Own-voice comfort is a weakness at 1.7/5, falling 0.81 points below the category average, which may cause your own voice to sound unnatural or boomy. The Diamond X1 is best suited for budget-conscious consumers who prioritize music and media streaming over maximum speech clarity. Those seeking stronger speech performance in challenging listening environments may want to consider higher-scoring alternatives in this price range, such as the Elehear Beyond or Apple AirPods Pro 2.
Choice

Signia Active Pro IX
The Signia Active Pro IX is a premium prescription hearing aid with a visible-in-ear style, priced at $3,199. In HearAdvisor's lab testing, it earned an A grade with a SoundScore of 4.7/5, ranking #7 among 36 prescription hearing aids tested—placing it in the top 17% of its category. This 2024 release demonstrates particular strength in speech performance. Speech in quiet scored a strong 4.3/5, sitting 0.93 points above the category average. Speech in noise measured 2.9/5, which is above the category average by 0.89 points, though only mixed in absolute terms. Own-voice comfort scored a solid 3.3/5, exceeding the category average by 0.55 points. Feedback handling presents a more nuanced picture at 3.4/5—solid in absolute terms, though 1.31 points below the category average. Music streaming scored 2.9/5, slightly above the category average but mixed overall. The device features rechargeable batteries, iPhone and Android streaming, and hands-free calling capabilities. The Signia Active Pro IX is best suited for those prioritizing speech clarity who want a discreet earbud-style design. It earned HearAdvisor's Expert's Choice Award for 2024. Shoppers in this premium price tier may also consider the Phonak Sphere Infinio or Oticon Intent, which scored higher in our testing, or explore options like the Rexton Reach at Costco for similar performance at a lower price point.
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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