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 4.64/5, placing it in the top 3% of all prescription hearing aids tested and ranking #2 out of 35 devices in its category.
This device demonstrates exceptional speech performance in our testing protocol. Speech in quiet scored an excellent 4.8/5, sitting 1.37 points above the category average. Where the Sphere Infinio truly distinguishes itself is in noisy environments, scoring 4.6/5 for speech in noise—a remarkable 3.07 points above the category average of just 1.53/5. Music streaming quality is also strong at 4.0/5, outperforming the category average by 1.39 points.
The device shows some trade-offs in other areas. Feedback handling scored a solid 3.6/5 in absolute terms, though this falls 1.14 points below the category average. Own-voice comfort scored 2.3/5, which is mixed in absolute terms and slightly below the category average. These results suggest users sensitive to their own voice or feedback-prone situations should discuss fitting adjustments with their provider.
The Sphere Infinio competes closely with other premium devices like the Oticon Intent (4.70/5) and Signia Active Pro IX (4.63/5). Its standout speech-in-noise performance makes it particularly well-suited for users who frequently navigate challenging listening environments such as restaurants, social gatherings, or busy workplaces. This device has received HearAdvisor's Expert's Choice Award in both 2023 and 2024.
