The Phonak Audeo S9 is the top of the range technology tier for the Audeo receiver-in-the-canal products. Within that the Audeo S9 Mini is the smallest of all the products yet it still contains the same fundamental core as the Smart and Yes product versions.
All hearing aids are a compromise between size and capacity, whether that capacity is battery, technology or features, the rules of nature apply that the smaller it gets the less it can do. The S9 Mini recognises that balance and is pitched towards those users whose preference is for the most discreet option available but who still want the maximum amount of technology possible.
The Audeo S9 compromise is on some of the feature set (e.g. no wireless for the S9 Mini) of its larger sister products but it is not on the sound processing as the feature set that is within the S9 Smart and S9 Yes is still there. So the Phonak proprietary sound processing algorithms such as Soundflow, Echocheck. Whistleblock, Soundrecover etc. still give those benefits resulting in a rich, natural sound for the S9 Mini user.
Although it is incredibly small, the S9 Mini should prove to be a robust and reliable product as it has a nano-coated ceramic case to guard against moisture ingress and unsightly scratches. Phonak have every reason to be proud of their top end, miniature hearing aid and so should you.