Phonak Audéo EON Sphere vs Phonak Sphere Infinio

The Phonak Audéo EON Sphere is a premium behind-the-ear prescription hearing aid that achieved the top ranking among 39 prescription hearing aids in HearAdvisor's lab testing, earning an A grade with a SoundScore of 5.0/5. In our testing, this device demonstrated exceptional speech clarity performance. Speech-in-noise scored 4.5/5, a strong result that sits 2.38 points above the category average—the standout metric for this product. Speech-in-quiet also performed well at 4.3/5, measuring 0.88 points above average. Music streaming quality was solid at 3.7/5, nearly a full point above the category average of 2.76/5. Feedback handling scored an excellent 4.6/5 in absolute terms, though this falls slightly below the category average by 0.12 points, reflecting the strong feedback management across prescription devices generally. Own-voice comfort measured 2.8/5, which is above the category average but mixed in absolute terms—a consideration for users sensitive to the sound of their own voice. At $4,598, the Phonak Audéo EON Sphere sits in the premium tier of prescription hearing aids. The device is best suited for users who prioritize speech understanding in challenging listening environments and want top-tier performance from their initial fitting. Those seeking similar sound quality at a lower price point may want to consider alternatives like the Phonak Sphere Infinio.

The Phonak Sphere Infinio is a premium behind-the-ear prescription hearing aid released in 2024, priced at $4,898. In our lab testing, it earned an A grade with a SoundScore of 5.0/5, placing it at #2 among 39 prescription hearing aids tested—within the top 3% of its category. The standout performance comes in speech clarity. Speech in noise scores an excellent 4.7/5, a remarkable 2.59 points above the category average of 2.11/5. Speech in quiet also impresses at 4.5/5, sitting 1.07 points above average. For anyone who struggles to follow conversations in restaurants, gatherings, or busy environments, this device delivers measurably superior intelligibility compared to most alternatives we've tested. Music streaming quality is strong at 4.0/5, exceeding the category average by 1.24 points—a meaningful advantage for users who value audio fidelity when streaming from phones. However, own-voice comfort is mixed at 2.3/5, falling 0.40 points below the category average, which may affect how natural your own speech sounds. Feedback handling, while solid in absolute terms at 3.6/5, sits 1.12 points below the category average of 4.72/5. The Sphere Infinio is best suited for users prioritizing exceptional speech understanding, particularly in challenging noise environments, and who are willing to invest at the premium tier. Those especially sensitive to own-voice quality or requiring maximum feedback stability may want to compare alternatives like the similarly-priced Oticon Intent or the lower-priced Phonak Audéo EON Sphere.