Phonak Sphere Infinio Ultra vs Signia Active Pro IX

The Phonak Sphere Infinio Ultra is a premium behind-the-ear prescription hearing aid priced at $4,898. In HearAdvisor's lab testing, it earned an A grade with a SoundScore of 4.9/5, placing it in the top 3% of the 36 prescription hearing aids tested and ranking #2 in its category. This device delivers exceptional speech performance in our testing. Speech in noise scored an excellent 4.5/5, a remarkable 2.55 points above the category average of 1.96/5—one of the largest margins we've measured in this critical metric. Speech in quiet also performed strongly at 4.3/5, exceeding the category average by 1.00 point. These results suggest the Sphere Infinio Ultra prioritizes speech clarity across challenging listening environments. Music streaming quality is solid at 3.3/5, sitting 0.66 points above the category average. Own voice comfort scored 2.8/5, which is above the category average but remains mixed in absolute terms—listeners sensitive to occlusion may notice this limitation. Feedback handling measured 4.2/5, which is strong in absolute terms though 0.51 points below the category average of 4.71/5. The Sphere Infinio Ultra is best suited for users who prioritize speech understanding, particularly in noisy environments, and who are prepared to invest in premium technology. Those seeking the highest feedback stability or improved own-voice comfort may want to compare alternatives, though this device's speech performance stands out as a category leader.

The Signia Active Pro IX is a premium prescription hearing aid with a visible-in-ear style, priced at $3,199. In HearAdvisor's lab testing, it earned an A grade with a SoundScore of 4.7/5, ranking #7 among 36 prescription hearing aids tested—placing it in the top 17% of its category. This 2024 release demonstrates particular strength in speech performance. Speech in quiet scored a strong 4.3/5, sitting 0.93 points above the category average. Speech in noise measured 2.9/5, which is above the category average by 0.89 points, though only mixed in absolute terms. Own-voice comfort scored a solid 3.3/5, exceeding the category average by 0.55 points. Feedback handling presents a more nuanced picture at 3.4/5—solid in absolute terms, though 1.31 points below the category average. Music streaming scored 2.9/5, slightly above the category average but mixed overall. The device features rechargeable batteries, iPhone and Android streaming, and hands-free calling capabilities. The Signia Active Pro IX is best suited for those prioritizing speech clarity who want a discreet earbud-style design. It earned HearAdvisor's Expert's Choice Award for 2024. Shoppers in this premium price tier may also consider the Phonak Sphere Infinio or Oticon Intent, which scored higher in our testing, or explore options like the Rexton Reach at Costco for similar performance at a lower price point.