Eargo 5 vs MDHearing VoltMax
Side-by-side HearAdvisor lab results with SoundGrades, expert pick badges, and the same visualizations we use in product reviews.

Eargo 5
The Eargo 5 is a premium-priced OTC hearing aid ($1,450) featuring an invisible-in-ear design with rechargeable batteries. In our lab testing, it earned a B grade with a SoundScore of 3.6/5, placing it in the top 52% of the OTC hearing aid category. This device demonstrates solid performance for speech understanding in quiet environments, scoring 3.5/5—0.75 points above the category average of 2.79/5. Own-voice comfort also measures above average at 2.8/5 (+0.29 vs category), though this remains mixed in absolute terms. Feedback handling is strong at 4.2/5, providing reliable stability during wear. However, the Eargo 5 shows notable limitations in other areas. Speech in noise performance is low at 1.4/5, slightly below the category average. Most significantly, music streaming scored 0.0/5, falling 1.92 points below the category average—this device does not support audio streaming functionality. The invisible-in-ear form factor appeals to users prioritizing discretion, and the closed sleeve coupling remains consistent between initial and tuned fits. Tuning provided modest improvement, moving from a normalized Initial Score of 3.5/5 to a Tuned Score of 3.7/5. Given its premium price point, consumers may want to compare against alternatives like the Sony CRE-C10 or Nuance Audio Glasses, which offer similar or better sound performance at lower price points. The Eargo 5 is best suited for users who prioritize cosmetic discretion and primarily need help with speech in quieter settings.

MDHearing VoltMax
The MDHearing VoltMax is a behind-the-ear OTC hearing aid priced at $699, earning a B grade with a SoundScore of 3.0/5 in our lab testing. This places it in the lower tier of the OTC hearing aid category, ranking 62nd out of 65 devices tested. In our testing, the VoltMax delivered mixed results across key performance areas. Its standout strength is excellent feedback handling, scoring a perfect 5.0/5—above the category average by 0.46 points. This means users can expect stable performance without whistling or squealing during typical daily activities. However, speech clarity proved challenging, with speech-in-quiet scoring 1.9/5 (0.93 points below category average) and speech-in-noise at 1.0/5 (0.48 points below average). Own-voice comfort measured 2.4/5, slightly below the category norm. A significant limitation is music streaming, which scored 0.0/5—nearly 2 points below the category average. Users who prioritize phone streaming for calls or media should consider alternatives. The device features rechargeable batteries, offering convenience over disposable options. At this price point, several competitors deliver substantially stronger overall performance. The VoltMax may appeal to budget-conscious consumers who primarily need basic amplification with reliable feedback control and don't require streaming capabilities. Those seeking better speech clarity or music streaming should explore higher-scoring options in this price range.
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)
Audio scenes
Using MUSHRA scenes (Tuned)
Fitting configuration for tuned fit