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

iHear MatriX
The iHear MatriX is a behind-the-ear OTC hearing aid priced at $499, earning a B grade with a SoundScore of 3.8/5 in our lab testing. This places it in the top 40% of OTC hearing aids, offering solid performance at a budget-friendly price point. In our testing, the MatriX demonstrated notable strengths in speech intelligibility. Speech in quiet scored a solid 4.0/5, measuring 1.17 points above the category average. Speech in noise performance came in at 2.4/5—above the category average by 0.96 points, though only mixed in absolute terms. Feedback handling was excellent at 5.0/5, surpassing the already-strong category average by 0.46 points, meaning users can expect reliable stability without whistling during typical wear. The most significant limitation is music streaming, which scored 0.0/5—a full 1.92 points below the category average. Users who prioritize streaming audio from their phone should consider alternatives. Own-voice comfort measured 2.7/5, slightly above category average but still mixed in absolute terms. The MatriX features rechargeable batteries and supports streaming from both iPhone and Android devices. With a normalized Initial Score of 3.7/5 improving to 4.3/5 after tuning, this hearing aid responds well to optimization. It's best suited for users who prioritize speech clarity and feedback-free wear over music streaming quality, and who want a budget OTC option that delivers above-average speech performance in our lab framework.

MDHearing Volt
The MDHearing Volt is a budget-priced prescription hearing aid available for $397, earning a B grade with a SoundScore of 3.1/5 in our lab testing. This behind-the-ear, rechargeable device ranks #32 of 36 prescription hearing aids tested, placing it in the top 86% of its category. In our standardized testing, the Volt demonstrates excellent feedback handling at 5.0/5, scoring 0.29 points above the category average. This represents a genuine strength, as the device remained stable under our challenge protocols without audible squealing or whistling. However, speech performance presents significant limitations: speech in quiet scored 1.8/5 (1.57 points below the category average of 3.32), while speech in noise scored 1.0/5 (0.96 points below the 1.96 average). Own-voice comfort measured 2.6/5, a mixed result that falls 0.15 points below the category average. Music streaming is notably limited at 0.0/5, scoring 2.64 points below the category average—users prioritizing phone streaming should consider alternatives. The Volt showed no improvement between Initial and Tuned fits, with both configurations yielding identical scores of 3.1/5. The MDHearing Volt may suit budget-conscious consumers who prioritize basic amplification and excellent feedback stability over speech clarity or streaming features. However, shoppers in this price range should note that alternatives like the RxEars Rxi offer substantially higher performance at similar pricing.
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