Phonak Sphere Infinio Ultra vs Signia Pure C&G BCT IX

The Phonak Sphere Infinio Ultra is a premium prescription behind-the-ear hearing aid released in 2026, priced at $4,898. In our lab testing, it earned an A grade with a SoundScore of 4.6/5, positioning it among the top performers in the Prescription Hearing Aid category. This device's standout strength is its exceptional speech performance. Speech in quiet scores an excellent 4.7/5, sitting 1.27 points above the category average of 3.43. Even more impressive is its speech-in-noise performance at 4.4/5—a strong score that lands 2.85 points above the category average of just 1.55/5. For listeners who struggle most in noisy environments like restaurants or social gatherings, these results are particularly noteworthy. Music streaming delivers a solid 3.3/5, coming in 0.66 points above category average. Own-voice comfort scores 2.8/5, which is above the category average but mixed in absolute terms—something to discuss with your hearing care provider if own-voice quality is a priority. Feedback handling measures 4.2/5, which is strong in absolute terms, though it falls 0.51 points below the category average of 4.71/5. The Sphere Infinio Ultra responds well to professional tuning, with the normalized score improving from 4.4/5 at initial fit to 5.2/5 when tuned—a 0.8-point gain. This premium device is best suited for those prioritizing speech clarity, particularly in challenging listening environments, and who plan to work with a hearing care professional to optimize their fitting.

The Signia Pure C&G BCT IX is a premium prescription behind-the-ear hearing aid priced at $3,398. In HearAdvisor's lab testing, it earned an A grade with a SoundScore of 4.4/5, ranking #8 among 36 prescription hearing aids tested. Speech performance is a clear strength for this device. Speech in quiet scored a strong 4.1/5, measuring 0.67 points above the category average. Speech in noise came in at 2.6/5—above the category average by 1.05 points, though only mixed in absolute terms, reflecting the inherent challenge of noisy environments for all hearing aids. Own-voice comfort stands out at 3.8/5, a solid score that exceeds the category average by 1.05 points, which may appeal to users sensitive to the sound of their own voice. Feedback handling scored a strong 4.2/5 in absolute terms, though this falls 0.51 points below the category average. Music streaming measured 2.7/5, essentially matching the category average with only a 0.06-point difference—a mixed result that may leave audiophiles wanting more. This hearing aid is best suited for users prioritizing speech clarity and own-voice naturalness who are comfortable investing in premium technology. Those seeking top-tier streaming music quality or the absolute best feedback suppression may want to compare alternatives in this price range, including the Oticon Intent or Phonak Sphere Infinio, which scored higher overall in our testing.