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Cearvol Diamond X1 Expert Review

Budget OTCReleased 2024

Our lab tested the Cearvol Diamond X1 using standardized measurements on an acoustic manikin to evaluate real-world hearing aid performance. This independent review presents objective data on amplification accuracy, speech clarity, and streaming quality for this budget OTC device.

See Price at Cearvol
Dr. Steve TaddeiDr. Steve Taddei, Au.D. — Lab Director & Reviewer
Dr. Abram BaileyDr. Abram Bailey, Au.D. — Fact Checker / Editor
How We Test
Cearvol Diamond X1 Hero
HearAdvisor
Cearvol Diamond X1
3.7HearAdvisor SoundScoreGrade B
As it sounds out of the box
Bottom Line

The Cearvol Diamond X1 is a budget-friendly OTC option with standout music streaming for casual listeners who prioritize entertainment features.

Top 45% of OTC Hearing Aid
Strengths
  • Excellent feedback handling
  • Strong music streaming+2.18 vs category
  • Budget-friendly at $199 with smartphone streaming
Drawbacks
  • Own voice quality below average
  • Limited speech-in-noise performance
Metric Breakdown

SoundScore: 5 Acoustic Dimensions

The score card below displays individual ratings for speech in quiet, speech in noise, own voice, feedback control, and music streaming. Each metric reflects standardized acoustic measurements performed in our controlled test environment. The purple SoundScore graph is the overall result, and the five graphs after it break it into individual measurements for the selected fit. Each curve shows how scores are spread across all tested hearing aids, and the dot and number mark the score for Cearvol Diamond X1.

SoundScore
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5.02
Choose your fit

Every hearing aid is lab-tested in two states — as it sounds out of the box, and after professional tuning. Switch fits to update the five metric graphs below.

As it sounds out of the box
Speech in quiet
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5.0

How clearly speech comes through in calm, one-on-one surroundings.

Speech in noise
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5.0

Speech understanding against loud background noise — the toughest everyday test.

Own voice
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5.0

How natural your own voice sounds while wearing the aids, without a boomy, plugged-up quality.

Music streaming
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5.0

Sound quality of music streamed to the hearing aids over Bluetooth.

Feedback handling
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5.0

Resistance to the whistling and squealing caused by acoustic feedback.

Overall Assessment

Cearvol Diamond X1 Verdict

The Cearvol Diamond X1 is a budget-priced OTC hearing aid available for $199, earning a B grade with a SoundScore of 3.7/5 in our lab testing. This visible-in-ear style device ranks #30 among 65 OTC hearing aids tested, placing it in the top 45% of its category.

The Diamond X1 delivers a mixed performance profile with one notable strength: music streaming. With a score of 4.1/5, it performs 2.18 points above the category average—a substantial margin that makes it appealing for users who value audio entertainment through their hearing aids. Feedback handling is excellent at 4.5/5, providing stable performance during typical daily movements. Both iPhone and Android streaming are supported with rechargeable batteries for convenience.

Speech performance presents a more modest picture. Speech in quiet scores 2.8/5, which is above the category average but only mixed in absolute terms. Speech in noise measures 1.7/5—above the category average of 1.48/5, though still low overall. Own-voice comfort is a weakness at 1.7/5, falling 0.81 points below the category average, which may cause your own voice to sound unnatural or boomy.

The Diamond X1 is best suited for budget-conscious consumers who prioritize music and media streaming over maximum speech clarity. Those seeking stronger speech performance in challenging listening environments may want to consider higher-scoring alternatives in this price range, such as the Elehear Beyond or Apple AirPods Pro 2.

Cearvol Diamond X1 Hero
Cearvol Diamond X1
VerdictListening TestGraphAudioLab NotesSpecsMore
Reliable & Repeatable Lab Results

Quality data starts with quality recordings. HearAdvisor worked with GRAS to build a no-compromise front end so every test is repeatable and reliable.

Learn more
Steve in HearAdvisor Lab

Listen for Yourself

Compare Cearvol Diamond X1 in a Blind Listening Test

Hear Cearvol Diamond X1 and competing devices recorded under identical acoustic conditions, without seeing which is which. Complete the side-by-side challenge to reveal the products, learn which sound you prefer, and add your anonymized responses to HearAdvisor's research database.

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Amplification Analysis

Diamond X1 Insertion Gain Measurements

The graph below plots measured insertion gain against prescriptive targets across the frequency range. This visualization shows how closely the Diamond X1 matches the amplification profile recommended for the test audiogram.

Graph

Audio Samples

Listen to the Diamond X1

These recordings capture what the Diamond X1 sounds like through our acoustic manikin in controlled listening scenarios. Compare the aided samples against the unaided reference to hear the amplification characteristics yourself.

Cearvol Diamond X1 Audio Samples

How this hearing aid sounds in our lab scenes. Compare it out of the box and after professional tuning.

Before you listen

  1. Use good-quality headphones.
  2. Take out your hearing aids while you compare.
  3. Play the to set a comfortable level, then leave it.
  4. Switch recordings while it plays. You won't lose your place.
Scene type

Scene type: Conversation

Scene: Cafe 1

As tested out of the box
0:00
–:––

164 lab recordings of this product. They demonstrate relative processing in our lab and cannot predict an individual fitting outcome.

Test Documentation

Diamond X1 Configuration Details

The lab notes below document the specific settings, app configurations, and test parameters used during our evaluation. This transparency allows you to understand exactly how we measured the Cearvol Diamond X1.

Lab Notes

Initial fit observations

Out of the box with closed dome coupling, the Cearvol Diamond X1 achieves a normalized Initial Score of 3.7/5. Music streaming is the standout at 4.1/5, while feedback handling performs excellently at 4.5/5. Speech metrics are more modest—speech in quiet at 2.5/5 and speech in noise at 1.5/5 represent limited audibility benefit in our testing. Own-voice comfort scores low at 1.7/5, suggesting noticeable occlusion effects. The initial fit provides a functional starting point with particular strength in streaming audio quality.

Tuned fit observations

After tuning adjustments while maintaining closed dome coupling, the normalized Tuned Score improves to 3.9/5—a 0.2-point gain over initial fit. Speech in quiet rises to 2.8/5 and speech in noise to 1.7/5, showing measurable improvement in audibility. Music streaming and feedback handling remain unchanged at their strong levels of 4.1/5 and 4.5/5 respectively. Own-voice comfort stays at 1.7/5, indicating the occlusion characteristics persist through tuning. The improvements demonstrate meaningful but modest gains from optimization.

Test configuration

Initial Fitting
Tuned Fitting
Ear Coupling
Closed Dome
Closed Dome
Specs
Visible in Ear
Visible in Ear
Rechargeable Batteries
Rechargeable Batteries
iPhone Streaming
iPhone Streaming
Android Streaming
Android Streaming

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