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Product Comparison

Go Hearing Go Prime vs Phonak Sphere Infinio Ultra

Side-by-side HearAdvisor lab results with SoundGrades, expert pick badges, and the same visualizations we use in product reviews.

Uses Official HearAdvisor Lab Data
Go Hearing Go Prime Hero
GoSoundGrade B

Go Hearing Go Prime

The Go Hearing Go Prime is a budget OTC hearing aid priced at $299, earning a B grade with a SoundScore of 3.3/5 in HearAdvisor's lab testing. This visible-in-ear style device ranks #50 of 65 OTC hearing aids tested, placing it in the top 75% of its category. In our testing, the Go Prime demonstrated excellent feedback handling, scoring a perfect 5.0/5—notably 0.46 points above the category average. This means users can expect stable performance without the whistling that can plague some hearing aids. Speech clarity in quiet environments measured at a mixed 2.7/5, slightly below the category average. Speech understanding in noisy situations scored low at 1.1/5, falling 0.39 points below average, suggesting this device may struggle in challenging listening environments like restaurants or social gatherings. The Go Prime's most significant limitation is its music streaming capability, which scored 0.0/5—nearly 2 points below the category average. Users who prioritize phone-streamed audio should consider alternatives. Own-voice comfort also scored low at 1.8/5, which may result in a "boomy" quality when speaking. At this price point, several competitors offer stronger overall performance, including the Elehear Beyond and Apple AirPods Pro 2. However, for budget-conscious consumers who primarily need basic amplification in quieter settings and value feedback-free operation, the Go Prime offers a functional entry point. The rechargeable batteries add convenience for daily use.

Expert Choice
Expert
Choice
Hero Image
PhonakSoundGrade A

Phonak Sphere Infinio Ultra

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.

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Performance metrics

Scale 1-5 (Tuned)

Lab metric by fit

Scale 1-5 (Tuned)

Speech in quietNew
Go Hearing Go Prime2.7
Phonak Sphere Infinio Ultra4.3
Speech in noiseNew
Go Hearing Go Prime1.1
Phonak Sphere Infinio Ultra4.5
Own voice
Go Hearing Go Prime1.8
Phonak Sphere Infinio Ultra2.8
Feedback handling
Go Hearing Go Prime5.0
Phonak Sphere Infinio Ultra4.2
Music streaming
Go Hearing Go Prime0.0
Phonak Sphere Infinio Ultra3.3
Overall fit score
Go Hearing Go Prime3.3
Phonak Sphere Infinio Ultra5.2

Speech level

Adjust input dB (Tuned)

Amplification (REIG)

Insertion gain at 65 dB (Tuned)

Fitting configuration for tuned fit

Go Hearing Go PrimePhonak Sphere Infinio Ultra
Ear CouplingClosed Dome
Ear CouplingEasyGuard Vented
Receiver
ReceiverMedium-power
Fitting Formula
Fitting FormulaAdaptive Phonak Digital 3.0 (Manufacturer proprietary targets)
Listening Program
Listening ProgramAutoSense OS (Automatic)
Volume Setting
Volume SettingAdjusted to match NAL-NL2 targets at 55, 65, and 75 dB SPL
Software Version
Software VersionV1.1.11.0
Tuning Adjustments
Tuning AdjustmentsProgrammed to N3 audiogram, Feedback calibrated, Long-Term Experienced User, Other settings at manufacturer defaults