Jabra Enhance Select 300 vs Linner Mercury
Side-by-side HearAdvisor lab results with SoundGrades, expert pick badges, and the same visualizations we use in product reviews.
Choice

Jabra Enhance Select 300
The Jabra Enhance Select 300 is a premium OTC hearing aid priced at $1,695 that earns an A grade with a SoundScore of 4.1/5 in our lab testing. This behind-the-ear device ranks #17 out of 65 OTC hearing aids tested, placing it in the top 25% of its category. In our standardized testing, speech clarity in quiet environments stands out as a notable strength, scoring 3.6/5—a solid result that sits 0.85 points above the category average. Feedback handling is excellent at 5.0/5, meaning users should experience stable performance without whistling during typical wear. Own-voice comfort also performs well at 3.5/5, nearly a full point above average, which can contribute to a more natural listening experience. Speech understanding in noisy environments presents a limitation, scoring 1.5/5—essentially at the category average but low in absolute terms. This is a common challenge across OTC devices, though users seeking strong noise performance may want to compare alternatives. Music streaming scores 2.6/5, which is above the category average by 0.68 points but mixed in absolute quality. The Enhance Select 300 offers rechargeable batteries and streaming compatibility with both iPhone and Android devices, along with hands-free functionality. It has earned Expert's Choice Awards in both 2023 and 2024. Shoppers in this price range should note that alternatives like the Lucid Tala and Audicus Omni 2 score higher overall, while options like the Jabra Enhance Pro 20 at Costco offer similar sound quality at a lower price point. This device is best suited for those prioritizing speech clarity in quieter settings and stable, feedback-free performance.

Linner Mercury
The Linner Mercury is a budget-priced OTC hearing aid that earns a B grade with a SoundScore of 3.1/5 in our lab testing. Priced at $387, it ranks #60 of 65 devices in the OTC Hearing Aid category, placing it in the top 91% of the category. In our testing, the Mercury shows a mixed performance profile. Its standout strength is excellent feedback handling at 4.7/5, which is 0.16 points above the category average—meaning users are unlikely to experience whistling or squealing during normal use. However, speech clarity metrics fall below category norms: speech in quiet scores 2.2/5 (0.62 points below average), and speech in noise scores a low 1.0/5 (0.48 points below average). Own-voice comfort also scores low at 1.6/5, sitting 0.91 points below the category average. Music streaming is a notable weakness, scoring 0.0/5—a full 1.92 points below the category average. Users who prioritize streaming audio from their phone should consider alternatives. The device uses a rechargeable battery and features a visible in-ear design with power dome coupling. At this price point, several competitors offer stronger overall performance. The Linner Mercury may appeal to budget-conscious consumers who prioritize feedback-free operation over speech clarity and streaming quality, but those seeking better speech understanding in challenging environments should explore higher-scoring options in this price range.
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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