Choosing between the Phonak Audeo I70 and the I90 Sphere Infinio is one of the most common questions in the premium hearing aid category this year. At HearUpAustralia, we help buyers compare genuine prescription hearing aids online. Below is a short guide to what separates these two models and which one fits your hearing needs and budget.
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Quick Answer: I70 or I90 Sphere?
- Choose the I90 Sphere Infinio if you often struggle in loud restaurants, meetings or family gatherings and want the strongest AI speech clarity available.
- Choose the I70 if you want the same dual-chip platform at a lower price and your listening situations are mostly moderate.
What Is Phonak Sphere Infinio?
Phonak Sphere Infinio is the brand's AI-powered hearing aid platform, first launched in 2024. It uses a dual-chip design:
- ERA chip: handles everyday sound processing, streaming and connectivity.
- DEEPSONIC chip: a dedicated AI processor that uses a deep neural network to separate speech from background noise in real time.
Phonak reports up to a 10 dB improvement in signal-to-noise ratio in noisy settings, which is about double what its standard Infinio models offer. Sphere comes in only two performance levels, I90 and I70. The Ultra versions add refinements such as extended battery life.
Phonak Audeo I70 vs I90 Sphere: Key Differences
| Feature | Audeo I70 (Sphere) | Audeo I90 (Sphere) |
|---|---|---|
| Tier | Advanced | Premium |
| AI chip (DEEPSONIC) | Yes | Yes |
| Spheric Speech Clarity | Medium (moderate) strength | Full strength |
| Speech Enhancer for soft or distant voices | Not included | Included |
| Fine-tuning channels | Slightly fewer, depending on version | 20 channels |
| Rechargeable, water and dust resistant (IP68) | Yes | Yes |
| Bluetooth streaming and app control | Yes | Yes |
| Best for | Moderate noise, everyday use | Loud, complex environments |
Channel counts for the I70 vary between sources, so confirm the exact figure for your version with an audiologist before buying.
Speech in Noise: Where the I90 Pulls Ahead
Both models carry the DEEPSONIC chip, so even the I70 outperforms most standard hearing aids in noise. The difference is how far the AI is allowed to work. The I90 runs Spheric Speech Clarity at full strength and adds a Speech Enhancer for soft or distant voices. The I70 runs it at a medium level. In quiet to moderate settings the gap is small. In crowded cafés, restaurants and events, the I90 gives noticeably more clarity and less listening fatigue by the end of the day.
Battery, Connectivity and Design
Both models are rechargeable RIC (receiver-in-canal) hearing aids with Bluetooth streaming for calls, music and video. They also support Roger accessories for classroom and conference use. Standard battery life is around 16 to 18 hours per charge, and Ultra versions extend this considerably. Sphere aids are slightly larger than standard Infinio models because of the second chip, but they remain discreet behind the ear.
One limitation: Sphere models do not have a CROS version. If you have single-sided hearing loss, look at the standard Infinio CROS range instead.
Price in 2026
Premium hearing aids are a real investment, and the I90 typically costs a few hundred dollars more per pair than the I70. Prices change with promotions and region. The Phonak Audeo (Ultra) I90 Sphere Infinio is currently listed at HearUpAustralia at A$3,350 (down from A$4,178), with free shipping, free programming and a 3-year manufacturer warranty.
Who Should Buy Which?
Pick the I90 if you:
- Spend a lot of time in noisy places
- Find soft or distant speech hard to follow
- Want the most advanced hearing technology available
Pick the I70 if you:
- Want AI-powered hearing at a lower price
- Mostly talk in small groups, at home or in moderate noise
- Are upgrading from an older hearing aid and want a noticeable jump in performance
Final Verdict
The I90 Sphere Infinio is the better choice for demanding listening environments. The I70 is the smarter value pick for most everyday situations. Both carry the same DEEPSONIC AI chip, so neither is a weak option.
Not sure which fits your hearing loss? Book a free consultation with our audiologists, or see the latest Phonak Audeo I90 Sphere Infinio product page.
Ready to compare and buy? Browse the full Phonak Sphere Infinio collection or explore all Phonak hearing aids at HearUpAustralia.