Only if the added fitting precision matters to you: the Infinio Ultra offers 20 adjustment bands for a hearing professional to fine-tune your response, a spec not documented for the HearLink 9050. If budget is the priority, the HearLink 9050 delivers telecoil access and IP68 durability at a much lower price.
Philips HearLink 9050 vs. Phonak Audéo Infinio Ultra
Check out our comparison of the Philips HearLink 9050 vs Phonak Audéo Infinio Ultra. Listen to audio samples and see how the two hearing aids differ in terms of sound performance, features, accessories, and more.
Published Updated
Quick Verdict
AI summarizedSummarized with AI assistance from our human-researched product information, in-lab testing, objective sound measurements, and expert ratings.
The real choice is between the HearLink 9050's telecoil and roughly $3,000 lower price versus the Infinio Ultra's 20-band fitting precision at a steep premium, and the HearLink is Costco-exclusive while the Infinio Ultra is not.
HearLink 9050
Choose the Philips HearLink 9050 if you want telecoil compatibility for looped venues and IP68-rated durability at roughly $3,000 less per pair than the Infinio Ultra, and you're comfortable buying through Costco's hearing centers.
Audéo Infinio Ultra
Choose the Phonak Audéo Infinio Ultra if you want a hearing professional to have 20 discrete adjustment bands to fine-tune your fit, and you're willing to pay a large premium for that finer in-clinic control.
What actually separates them
AI summarizedPrice gap
PriceThe HearLink 9050 runs about $3,000 less per pair than the Infinio Ultra, a difference large enough to be the deciding factor for most buyers unless the extra adjustment control below is worth that premium to you.
Fitting precision (adjustment bands)
SpecThe Infinio Ultra offers 20 adjustment bands for a hearing professional to shape the frequency response in detail; the HearLink 9050's band count isn't specified, so buyers who want documented fine-grained fitting control have a clearer answer with the Infinio Ultra.
Telecoil access
SpecOnly the HearLink 9050 includes a telecoil, useful for connecting to induction loop systems in theaters, places of worship, and some public venues; the Infinio Ultra has no telecoil.
Purchase channel
SpecThe HearLink 9050 is sold only through Costco's hearing centers, while the Infinio Ultra is not tied to that single retailer, which matters if you have a preferred audiology clinic or don't have Costco access nearby.
Product Overview
HearLink 9050
Audéo Infinio Ultra
Form Factor
Form FactorThis type of hearing aid sits behind the ear. A wire runs along the top of the ear and down to a speaker sitting inside the ear canal. An custom-fitted mold may be required.
Form FactorThis type of hearing aid sits behind the ear. A wire runs along the top of the ear and down to a speaker sitting inside the ear canal. An custom-fitted mold may be required.
Expert Rating
N/A
Score
4.4
User Rating
3.619 reviews
3.47 reviews
Hearing Loss LevelHearing Loss LevelThis represents HearingTracker's best guess on suitability. Please consult a licensed audiologist to confirm your own candidacy for this device.
MildModerateSevere
MildModerateSevere
Product Features
Hands-freeRechargeableiPhoneAndroidTelecoilIP68
Hands-freeRechargeableiPhoneAndroidIP68
Expert Ratings
Compare comprehensive test results and expert opinions.
HearLink 9050
Audéo Infinio Ultra
HearingTracker Score
HearLink 9050
Not yet rated by our experts
Audéo Infinio Ultra
4.4ABOVE AVERAGE
Phonak’s Infinio Sphere delivers genuinely standout speech clarity in loud, noisy places thanks to its DEEPSONIC “Sphere mode,” but you’ll trade some discretion and may wrestle with fit or Bluetooth pairing to get that top-tier performance.
Read full reviewHearAdvisor SoundScore
HearLink 9050
Not yet rated by our experts
Audéo Infinio Ultra
4.6EXCELLENT
Phonak Sphere Infinio Ultra achieved a SoundScore of 4.58/5 in HearAdvisor lab testing. The Prescription Hearing Aid category average SoundScore was 3.91/5.
Build Quality
HearLink 9050
Not yet rated by our experts
Audéo Infinio Ultra
5.0EXCELLENT
Phonak Audéo Sphere Ultra have an excellent build quality with a robust, portable charging case and a high ingress rating of IP68.
Battery
HearLink 9050
Not yet rated by our experts
Audéo Infinio Ultra
4.6EXCELLENT
Audéo Infinio Ultra offer around 17 hours of use per charge under normal use and streaming conditions. When using the new Sphere mode, battery life is around 10 hours which is an improvement over the original Sphere Infinio model. They take 3 to 4 hours to recharge, and a 30-minute quick charge can provide an additional 6 hours of use.
Bluetooth
HearLink 9050
Not yet rated by our experts
Audéo Infinio Ultra
5.0EXCELLENT
Phonak Infinio Ultra are compatible with both iOS and Android, offering wireless audio streaming and hands-free calls. Pairing is now easier directly from your phone's Bluetooth menu.
App Features
HearLink 9050
Not yet rated by our experts
Audéo Infinio Ultra
5.0EXCELLENT
I found the MyPhonak Hearing Aid app easy to use with many useful features, including health and fitness tracking.
Comfort
HearLink 9050
Not yet rated by our experts
Audéo Infinio Ultra
5.0EXCELLENT
Phonak Audéo Sphere Infinio Ultra were extremely comfortable and lightweight in my ears. In general, hearing care providers can make numerous physical changes to prescription hearing aids to improve comfort.
Design
HearLink 9050
Not yet rated by our experts
Audéo Infinio Ultra
4.1AVERAGE
Phonak's new Audéo Sphere Infinio Ultra model shares the same notably larger size as the original Phonak Infinio Sphere. This is needed for its increased AI processing. While the larger size may be more noticeable, Sphere Ultra remains comfortable, and your provider should have no trouble adjusting the fit to your preference.
Value
HearLink 9050
Not yet rated by our experts
Audéo Infinio Ultra
3.4AVERAGE
Phonak Sphere Infinio Ultra has a value score of 3.4/5 based on lab performance and public display price.
Handling
HearLink 9050
Not yet rated by our experts
Audéo Infinio Ultra
4.8EXCELLENT
Infinio Ultra are easy to use and adjust using either the large multi-function button or MyPhonak app. I had no issues making adjustments with either.
Pro Support
HearLink 9050
Not yet rated by our experts
Audéo Infinio Ultra
5.0EXCELLENT
Prescription hearing aids like Infinio Sphere Ultra are fit by hearing care providers so you should receive quality care. The MyPhonak app also opens the possibility for remote programming and virtual follow-up appointments.
Lab Recordings
Listen to direct output recordings from our acoustic test lab.
HearLink 9050
Audéo Infinio Ultra
Busy CafeBusy CafeSpeech intelligibility improvement in loud environments
Hear this scene unaided, for comparison
HearLink 9050
Lab recordings not yet available
Audéo Infinio Ultra
Quiet OfficeQuiet OfficeSpeech intelligibility improvement in quiet and moderate environments
Hear this scene unaided, for comparison
HearLink 9050
Lab recordings not yet available
Audéo Infinio Ultra
Streaming MusicStreaming MusicStreaming music provides a full range of bass and treble
Hear this scene unaided, for comparison
HearLink 9050
Lab recordings not yet available
Audéo Infinio Ultra
HearingTracker partners with HearAdvisor to provide recordings and performance data from an acoustic laboratory that follows standard scientific procedures. All hearing aids are fitted and performance-tested for mild sloping to moderate hearing loss. All audio samples cutoff above 10kHz.
Accessories
Compatible accessories for each hearing aid
HearLink 9050
Audéo Infinio Ultra
Accessory Connectivity
None
RogerDirect™
As a break-through in hearing technology, Marvel hearing aids feature RogerDirect™ which allows the Roger technology to stream directly to Marvel hearing aids without having to attach an external receiver. This major innovation makes Roger technology easier to use and more attractive for a broader group ranging from mild to profound hearing loss. Roger technology makes use of intelligent and adaptive algorithms that continuously measure and precisely analyze noise levels to keep the Roger signal clearly audible above the background noise.
Battery Charger
Charger Plus miniRITE+1
A fast, portable charger for traveling light and charging on the go. Charge for a full day's power in 1 hour or get 4 hours of use from a quick 15-minute charge.
HearLink desk charger
A faster contact charger for a full day’s power in one hour, or up to four hours of hearing in only 15 minutes.
ChargerGo RIC Sphere Infinio+1
Charger with integrated battery
Remote AdjustmentsRemote AdjustmentsAllows your hearing provider to make adjustments to your hearing aids remotely (from home, etc)
None
myPhonak App+2
The myPhonak app allows you to access remote support, information about their hearing aids, and a hearing diary. The app also allows you to adjust the volume and pitch of your hearing aids, and change program settings.
Remote Control
AudioClip+3
The Philips AudioClip is a hearing aid accessory that serves as a remote microphone to help you better hear one-to-one conversations in noisy environments or when listening to someone speak from a distance.
Remote Control
To turn the volume up and down on your hearing aids you can use the Philips HearLink app. In case you prefer using the Philips Remote Control we have this option as well.
HearLink 2 app+2
App allows you to change programs, adjust the volume, mute your hearing aids, activate streaming options and personalize your sound. You can also use the app to connect with your hearing care specialist if you need to have your hearing aid settings adjusted remotely.
RemoteControl
The Phonak RemoteControl provides a discreet way to control your Phonak hearing aids.
Remote Microphone
None
Roger Table Mic II+1
Phonak Roger Table Mic II is a microphone dedicated for working adults who participate in various meetings. It selects the person who’s talking and switches automatically between the meeting participants.
PartnerMic™
Discreet remote microphone that helps to boost your partners voice in one-to-one conversations in noise.
TV Streamer
TV Adapter
Connect the Philips TV Adapter to your TV so you hear the sound from the TV directly in your hearing aids. This allows you to watch TV at your preferred volume.
Roger Select™+4
Phonak Roger Select is a microphone specifically designed to help boost your hearing performance and keep you at the heart of the conversation.
TV Connector
The Phonak TV Connector is a wireless accessory that streams audio directly from your TV or stereo system to your Phonak hearing aids, transforming them into wireless stereo headsets. Enjoy high-quality sound, independent volume control, and a long transmission range of up to 15 meters.
Roger On+1
Phonak Roger On is an advanced remote mic accessory developed by Phonak. It is designed to improve speech understanding in noisy environments, over distance, and when many people are speaking simultaneously. Equipped with MultiBeam 2.0 Technology, it provides a boost in understanding by capturing voices from all directions. The Roger On can connect to a variety of multimedia devices and is fully compatible with almost all hearing aids and cochlear implants that have a T-coil or a Roger receiver.
Hardware
HearLink 9050
Audéo Infinio Ultra
AccelerometerAccelerometerThis hearing aid is capable of measuring acceleration through an embedded sensor.
Yes
Yes
Bluetooth® AudioBluetooth® AudioThis hearing aid is capable of streaming Bluetooth® audio certain phones and/or devices.
- Made for iPhone (MFi)
- Android (ASHA)
- Bluetooth® Low Energy (LE)
- Bluetooth® Auracast™
- Bluetooth® (A2DP)
- Bluetooth® Low Energy (LE)
- Auracast™ Ready
GyroscopeGyroscopeThis hearing aid is able to determine orientation using embedded sensors.
Yes
No
Hands-Free CallingHands-Free CallingIt is possible to have a hands-free phone call with this hearing aid. You are not required to hold the phone up to your mouth.
- Made for iPhone (MFi)
- Android (ASHA)
- Bluetooth® Low Energy (LE)
- Bluetooth® (HFP)
- Bluetooth® Low Energy (LE)
IP RatingIP RatingIP Ratings rate sealing effectiveness of hearing aids against intrusion from foreign solid matter (dirt, dust) and moisture.
IP68
IP68
Push ButtonPush ButtonThe hearing aid features a push button which allows toggling across different sound processing programs
- Program control
- Volume Control
- Mute control
- Power on/off
- Call accept/reject
- Tinnitus volume
- Airplane Mode
- Program control
- Volume Control
- Audio Stream Mix
Rechargeable BatteriesRechargeable BatteriesCharge your batteries overnight in a docking station and get a full day's use (in most cases) of battery life the following day.
Lithium-ion
Lithium-ion
Tap ControlsTap ControlsThe hearing aid may be controlled by physically tapping it with your fingers.
- Accept/end calls
- Voice assistant
- Accept/end calls
- Pause/Resume
- Tinnitus program
TelecoilTelecoilThe hearing aid is able to pick up audio from landline telephones or public audio systems without using its acoustic microphones. This minimizes background noise and improves clarity and understanding, even over great distances. At performing arts venues, events, government meetings, etc., look for assistive listening systems (hearing loop, FM, and infrared systems), which must be provided at no cost under the Americans with Disabilities Act (ADA) and other international regulations.
Yes
No
Voice AssistantVoice AssistantCertain devices will allow you to interact with voice assistants using "Hey Siri", "Hey Google", "Hey Alexa", etc commands.
No
- Siri
Volume RockerVolume RockerA volume rocker or wheel to allows the adjustment of volume with a finger.
No
Yes
Software Features
HearLink 9050
Audéo Infinio Ultra
Adjustment BandsAdjustment BandsThese are frequency-divided sections that can be adjusted in a hearing aid in order to amplify sounds. Although there are rarely more than 10 frequencies measured in a hearing assessment, having more bands that can be adjusted may allow for improved speech understanding and user comfort.
Yes
20
Adjustment SynchronizationAdjustment SynchronizationThis feature allows for a more pleasant listening experience by ensuring that both hearing aids process sound the same way. If one hearing aid changes its processing in response to noise or speech, it will send a wireless signal to the other hearing aid so both process sound in the same way.
No
QuickSyncQuickSyncOne touch on the program selection button or volume control results in instant identical change in the other instrument.
AI Noise RemovalAI Noise RemovalArtificial Intelligence is utilized to remove or modify background noise from the sound signal to help isolate speech for better speech understanding.
AI Noise ReductionAI Noise ReductionHearLink 50 quickly removes background noise with the help of AI-powered technology, so speech is easier to understand in noisy environments.
No
Audio Stream MixerAudio Stream MixerAllows the user to adjust the volume of the audio stream relative to the microphone input using the push button or volume control on the hearing aid unit.
No
Environmental BalanceEnvironmental BalanceEnvironmental balance is a volume modification capability in Phonak Audéo B-Direct hearing aids that allows clients to adjust the volume of the streamed signal versus the surrounding environmental sounds by the press of the volume control.
Better Ear FocusBetter Ear FocusSome modern hearing aids can share sound from one ear to the other. In some cases the sound from the less noisy side can be shared to the other ear, enabling the listener to hear a cleaner sound in both ears.
Yes
No
DirectionalityDirectionalityDepending on the types and number of microphones a hearing aid has, the hearing aid may be able to boost sounds from specific directions (by reducing sounds from other directions). This can be helpful to focus on a speaker directly in front of the hearing aid user, as well as to give the user information about where different sounds are coming from.
No
StereoZoom 2.0StereoZoom 2.0Improves signal-to-noise ration in background by focusing a narrow microphone beam.UltraZoomUltraZoomDirectional microphone technology is a proven method of effectively improving speech intelligibility in background noise. UltraZoom is the adaptive multi-channel beamforming technology, automatically available in AutoSense OS or in a manual program.
Ear SimulationEar SimulationThe outer ear, or pinna, can have a significant effect on the frequency shape of sound arriving at your inner ear. Some hearing aids mimic the "pinna effect" when producing sound, to deliver more natural sound to the listener.
3 options
Real Ear SoundReal Ear SoundReal Ear Sound simulates the performance characteristics of the pinna. This restores localization and the ability to experience natural sound perception.
Environmental AdaptationEnvironmental AdaptationThe hearing aid can detect different acoustical environments, like speech in noise, and adjust the sound of the hearing aid accordingly to drive comfort or speech understanding, etc.
No
AutoSense OS: 6.0AutoSense OSHearing aids with AutoSense OS recognize and automatically adapt to more of your client’s listening situations than ever before. AutoSense OS accurately captures and analyzes the sound environment, then precisely blends feature elements from multiple programs in real time to provide a seamless listening experience.
Extended bandwidthExtended bandwidthHearing aid provides amplification at frequencies (pitches) higher than the typical hearing aid.
10kHz
No
Extended Dynamic RangeExtended Dynamic RangeExtended dynamic range typically makes louder sound clearer. This may help with the reproduction of loud music or loud speech in a very noisy environment.
Yes
No
Feedback SuppressionFeedback SuppressionIf any sound amplified by the hearing aid escapes the ear canal, it may reach the hearing aid’s own microphone and cause a harsh whistling noise. Some hearing aids are able to recognize when this feedback occurs and reduce or eliminate it.
Yes
WhistleBlockWhistleBlockWhistleBlock differentiates between naturally occurring feedback-like sounds and true feedback. This means increased audibility and sound quality that is free from annoying feedback.
Frequency LoweringFrequency LoweringUnderstanding certain speech sounds is dependent on the high frequency parts of these sounds. For individuals with high frequency hearing loss, this feature can take high frequency speech information and move it to lower frequencies where it will be audible.
Yes
SoundRecover2SoundRecover2The new SoundRecover2 algorithm aims to restore the audibility of relevant high frequency sounds while leaving intact the low frequency structures important for good sound quality. The new frequency lowering scheme retains the essence of the original SoundRecover, utilizes an adaptive algorithm and an additional cut-off frequency in order to successfully extend these benefits to those with more extreme severe-to-profound hearing loss.
Handling noise reductionHandling noise reductionReduces noises related to hearing aid movement on the ear and noises related to hands or objects touching the hearing aid while worn.
Yes
No
Listening ProgramsListening ProgramsNumber of manually accessible listening programs (using push button, remote, app, or other switching method)
4
4
New User AdaptationNew User AdaptationProvider may set the hearing aid to gradually get louder over the first few weeks or months of a new hearing aid fitting. This can be convenient for new users who want to experience maximum benefit without making a lot of trips to the provider for tune ups.
Yes
auto Acclimatizationauto Acclimatizationauto Acclimatization is used to automatically increase the client's amplification, while the client is using the device.
Noise ReductionNoise ReductionThis feature uses modern hearing aids’ processing power to examine the incoming sound signal, determine if noise is present and reduce the volume of the troublesome sound to increase comfort.
No
NoiseBlockNoiseBlockHigh-resolution noise cancellation - NoiseBlock Processing is particularly effective at reducing uncomfortable environmental noises. It can recognize the subtle differences between speech and non-speech sounds, removing noise while maintaining audibility. more
Occlusion ReductionOcclusion ReductionWhen ears are plugged, or occluded, by hearing aids the low frequencies from one’s own voice are amplified and may be uncomfortable. This effect is typically reduced in hearing aids through venting or open-fit models. In some cases the perception of occlusion may also be reduced through software by adjusting the acoustic output of the hearing aid.
No
AOVAOVAcoustically Optimized Venting (AOV) reduces occlusion to the lowest level possible by optimizing the fitting calculation.
Phone in StereoPhone in StereoThis feature allows input from a phone presented to one hearing aid to be transmitted to both hearing aids at the same time, improving speech understanding.
No
DuoPhoneDuoPhoneWith DuoPhone, as soon as the phone is held to the ear the signal is heard in both ears. Background noise is reduced and clarity significantly improved.
Preference AdaptationPreference AdaptationIf a hearing aid user frequently adjusts the volume or program settings of their devices, some hearing aids will recognize when and where these changes are made and begin automatically making these changes in those settings.
No
User Preference TuningUser Preference TuningRemembers adjustments you make with FlexControl and FlexVolume and applies them automatically for a hearing aid more in tune with your preferences.
Processing ChannelsProcessing ChannelsThese are all the frequency-divided sections the hearing aid is able to examine at a single time. The hearing aid uses this information to determine whether the contents of each section are noise, speech, or something else and amplify the sound in each section accordingly.
64
No
Soft Speech BoostSoft Speech BoostMore aggressive amplification for softer speech sounds
Yes
No
Spatial AwarenessSpatial AwarenessListening to sound through hearing aids is not a natural experience, and your ability to tell where a sound is coming from may be impacted by the way sounds are amplified with hearing aids. Some hearing aids attempt to fix this problem by preserving cues to sound localization like between-ear level differences, etc.
4 options
No
Spatial Noise CancellationSpatial Noise CancellationThis feature recognizes where sounds are coming from and can reduce noise coming from behind or to the side of the listener. This helps the listener focus on the speaker, usually in front of them.
Yes
Dynamic Noise CancellationDynamic Noise CancellationAn automated spatial noise cancellation system that works in combination with a directional beam-former microphone system.
Streaming Bass BoostStreaming Bass BoostBoosts bass when streaming audio
Yes
No
Sudden Loud Noise ReductionSudden Loud Noise ReductionThis feature detects loud sounds and reduces their volume to a comfortable level. Though not a replacement for hearing protection, this technology can greatly improve listener comfort.
SoundProtect Transient Noise Reduction: 6 optionsSoundProtect Transient Noise ReductionThis feature detects loud sounds and reduces their volume to a comfortable level. Though not a replacement for hearing protection, this technology can greatly improve listener comfort.
SoundRelaxSoundRelaxSoundRelax cushions otherwise unpleasant impulse sounds without affecting speech clarity or causing unnatural perception of other sounds.
Tinnitus ReliefTinnitus ReliefTinnitus, or ringing in the ears, can be addressed by hearing aids in several different ways, such as introducing a soft therapeutic signal or targeted notched noise.
Tinnitus SoundSupportTinnitus SoundSupportTinnitus, or ringing in the ears, can be addressed by hearing aids in several different ways, such as introducing a soft therapeutic signal or targeted notched noise.
Tinnitus BalanceTinnitus BalanceThe Tinnitus Balance noise generator generates a broadband sound for use in tinnitus management therapies.
Unique Amplification StrategyUnique Amplification StrategyHearing aids all process sounds a little bit differently. Sometimes it varies even within one model.
SoundGuideSoundGuideBy using motion sensing technology to detect whether they are walking on a noisy street, sitting down with a loved one over coffee, or out and about with a group of friends, speech and other important sounds are now clearer than ever.SoundMap 3SoundMap 3SoundMap 3 uses AI Noise Reduction (AR-NR) and advanced directionality to carefully remove noise and prioritize speech in noisy environments...Speech ClarifierSpeech ClarifierSpeech Clarifier makes speech stand out in noise.
Motion Sensor HearingMotion Sensor HearingA new ultra-low power accelerometer detects when you move and adjusts the hearing aid microphones and noise cancellation settings.Speech EnhancerSpeech EnhancerAmplifies the peaks of soft speech to provide clearer speech when you’re in a quiet environment.
Wind Noise ReductionWind Noise ReductionAs wind blows against the microphones of hearing aids, unpleasant noise may be generated. Some hearing aids have the ability to recognize this wind noise and reduce its level. Such reductions may also affect the audibility of desired sounds, like speech.
SoundProtect Wind Noise ManagementSoundProtect Wind Noise ManagementAs wind blows against the microphones of hearing aids, unpleasant noise may be generated. Some hearing aids have the ability to recognize this wind noise and reduce its level. Such reductions may also affect the audibility of desired sounds, like speech.
WindBlockWindBlockWindBlock utilizes a wind identification and classification system. The powerful, adaptive algorithm automatically suppresses wind noise. It allows wearers to enjoy the outdoors without compromise.
Bottom Line
AI summarizedThe Verdict
The Philips HearLink 9050 is the pragmatic pick: it costs about $3,000 less per pair, adds a telecoil for looped venues, and carries an IP68 rating, though you'll need to buy it through Costco's hearing centers.
The Phonak Audéo Infinio Ultra asks for a large premium, and its main documented edge is 20 adjustment bands giving your fitter finer control over the frequency response.
Which is right for you?
If budget and telecoil access matter to you, the HearLink 9050 is the easier justification. If your priority is giving a hearing professional maximum room to fine-tune your fit and you're not constrained by price, the Infinio Ultra's adjustment range is the more defensible reason to spend more — but that premium isn't backed here by any measured performance advantage.
What to ask at your fitting
AI summarizedAsk about adjustment-band fitting on the Infinio Ultra
With 20 adjustment bands available, discuss with your fitter how finely they can tailor the Infinio Ultra to your specific audiogram versus the HearLink 9050.
Confirm telecoil needs before choosing
If you regularly use induction loop systems, the HearLink 9050's telecoil is a capability the Infinio Ultra does not offer.
Weigh the $3,000 gap against your budget
Ask your fitter whether the Infinio Ultra's added fitting precision justifies its roughly $3,000 premium over the HearLink 9050 for your specific hearing loss.
Frequently Asked Questions
AI summarizedThe Philips HearLink 9050 has a telecoil, useful for induction loop systems in theaters and places of worship. The Phonak Audéo Infinio Ultra does not include one.
No, the HearLink 9050 is sold exclusively through Costco's hearing centers. The Phonak Audéo Infinio Ultra is not tied to a single retailer.
The Phonak Audéo Infinio Ultra documents 20 adjustment bands, giving a fitter more discrete points to shape the frequency response. The HearLink 9050's band count isn't specified in the data available.