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1 / 8Sony
Sony INZONE E9
Value for Money & durability / build quality
8.7/ 10
8.7
0.010.0
A 8.7 puts its value for money in the top quarter of earbuds we've measured.
Measured on 170 of the 365 we've cataloged.
8.2/ 10
8.2
0.010.0
A 8.2 puts its durability / build quality in the top third of earbuds we've measured.
Measured on 170 of the 365 we've cataloged.
See the lab data ↓Frequency response · Isolation · Audio quality
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Key specs
Connection Type
Most commonWired-3.5mm62%Wired-usb-c26%Wired-lightning13%
Wired-3.5mm is the most common — on 62% of the 39 wired earbuds we've cataloged (of 40).
Cable Type
Most common3.5mm single-ended63%Usb-c29%Mmcx detachable6%Lightning3%
3.5mm single-ended is the most common — on 63% of the 35 wired earbuds we've cataloged (of 40).
Earbud Form Factor
In-earMost commonIn-ear86%Earbud (flat)8%Others6%
In-ear is the most common — on 86% of the 36 wired earbuds we've cataloged (of 40).
Microphone
NoTrue81%False19%
False appears on 19% of the 37 wired earbuds we've cataloged (of 40).
Connectivity
- Connection Type
- Wired-3.5mm, wired-usb-c
- Cable Type
- 3.5mm single-ended, USB-C
Design
- Earbud Form Factor
- In-ear
- Color Options
- Black, white
- Ear Tip Material
- Silicone, foam
- Ear Tip Sizes Included
- 4 sizes
- Detachable Cable
- Yes
- Wearing Style
- Over-ear (cable up)
- Weight Per Earbud
- 4.7 g
Microphone
- Microphone
- No
Sound
- Driver Type
- Dynamic
- Driver Count
- 1
- Driver Size
- 5 mm
- Frequency Response
- 10-20000 Hz
- Frequency Response High Hz
- 20000 Hz
- Frequency Response Low Hz
- 10 Hz
- Frequency Response Signature
- Neutral
- Sensitivity
- 101 dB/mW
Build
- Sweat Resistance
- No
- Water Resistance
- No
Features
- Eq Customization
- Full parametric EQ
- Auto Pause
- No
- Inline Controls
- No
- Mono Mode
- No
- Spatial Audio
- Fixed
Identity
- Model Number
- E9
Release
- Msrp Usd
- 149.99 USD
Lab data
How we test ›Objective measurements from the SoundGuys test lab — overlay other models to see how this one compares.
Sony INZONE E9SoundGuys Headphone Preference Curve
Measured frequency response (dB relative) against the SoundGuys Headphone Preference Curve. When the measurement goes above the dashed line, that frequency is louder than our preference curve, and when it goes below: it's quieter. Use the curve for comparison purposes only, as your taste may vary.
| Frequency (Hz) | Response (dB) |
|---|---|
| 20 | -6.7 |
| 25 | -5.3 |
| 32 | -4.0 |
| 40 | -2.7 |
| 50 | -1.6 |
| 63 | -0.7 |
| 80 | -0.1 |
| 100 | 0.4 |
| 125 | 0.6 |
| 160 | 0.2 |
| 200 | -0.5 |
| 250 | 0.2 |
| 315 | -0.3 |
| 400 | -1.7 |
| 500 | -1.9 |
| 630 | -1.3 |
| 800 | -0.8 |
| 1000 | 0.1 |
| 1250 | 1.5 |
| 1600 | 3.8 |
| 2000 | 6.6 |
| 2500 | 8.6 |
| 3150 | 6.0 |
| 4000 | 3.4 |
| 5000 | 4.9 |
| 6300 | 5.3 |
| 8000 | 2.1 |
| 10000 | -6.9 |
| 12500 | -8.3 |
| 16000 | -12.2 |
| 20000 | -16.4 |
Sony INZONE E9
Passive isolation (dB) with ANC off — how much ambient noise the fit blocks on its own. Higher on the chart means more attenuation.
| Frequency (Hz) | Attenuation (dB) |
|---|---|
| 21 | 11.7 |
| 26 | 11.9 |
| 33 | 11.0 |
| 41 | 7.5 |
| 52 | 15.7 |
| 65 | 14.5 |
| 82 | 12.9 |
| 103 | 13.4 |
| 130 | 13.9 |
| 163 | 11.9 |
| 205 | 9.3 |
| 259 | 11.4 |
| 325 | 13.7 |
| 410 | 20.4 |
| 516 | 13.4 |
| 613 | 14.8 |
| 772 | 21.7 |
| 972 | 23.8 |
| 1220 | 29.1 |
| 1540 | 30.6 |
| 1940 | 35.2 |
| 2440 | 38.1 |
| 3070 | 41.0 |
| 3870 | 36.8 |
| 4870 | 31.5 |
| 6130 | 34.4 |
| 7720 | 36.4 |
| 9720 | 44.2 |
| 12200 | 38.2 |
| 15400 | 49.4 |
| 19400 | 40.3 |
Sony INZONE E9
4.1
4.1
3.5
4.0
Multi-Dimensional Audio Quality Scores (1–5), modeled from the measured response. Higher is better across timbre, distortion, and immersiveness — add other models to see where this one lands.
SoundGuys review
SOUNDGUYS rating
Reviewed byJhaycee CalvezVideo Producer/WriterReviewed August 2025
7.2/ 10
RecommendedIsolation8.1
Comfort & fit9.0
Design8.0
Portability8.0
Value8.7
The verdict
Sony's first gaming IEMs, the INZONE E9, are an example of focusing on specific areas that lead to great results. It does extremely well in competitive FPS titles, at the cost of being worse at everything else. For serious competitive gamers, these are worth getting.
✓Liked: Great for competitive FPS games, Amazing passive isolation, Small and can be worn underneath headphones, Price
✕Could be better: Sounds Unexciting, Unfriendly for daily use, Bulky case
Owners
How we verify ownersNobody who owns the Sony INZONE E9 has written in yet.
Owner notes are not paid for, not solicited from specific owners, and not edited by us. The commission SoundGuys may earn on this page comes from retail links, never from notes.
Own the Sony INZONE E9?
Three answers, four quick reads, one sentence nobody tells you before buying. Shown under a pseudonym.
Features & Opinions
More from the team ›Commentary and deep dives from the SoundGuys editorial team.
The Sony XM4C prove we don't need a new headphone model every yearSony's newest headphones aren't new at all, and that's kind of the point.
Adam BirneyManaging EditorI didn’t love the Sony 1000X The Collexion until I tried this settingSometimes the best upgrade is already hiding in the app.
Dave CarrVideo Producer/WriterClip-on earbuds fixed my biggest issue with open-earsClip-on earbuds offer a secure fit, better sound, and zero pressure.
Brady SnyderContributorI ditched my AirPods Pro 3 for Sony's WF-1000XM6 and only lasted a weekI thought the more expensive earbuds would win. I was wrong.Dave CarrVideo Producer/Writer3 headphones I would buy instead of the AirPods Max 2These premium headphones deliver class-leading ANC, longer battery life, and more flexibility for less money.Dave CarrVideo Producer/WriterSony somehow made the name of its new headphones even worseNobody knows what it means, but it's provocative.Adam BirneyManaging Editor
Adam BirneyManaging EditorI didn’t love the Sony 1000X The Collexion until I tried this settingSometimes the best upgrade is already hiding in the app.Dave CarrVideo Producer/WriterClip-on earbuds fixed my biggest issue with open-earsClip-on earbuds offer a secure fit, better sound, and zero pressure.Brady SnyderContributorI ditched my AirPods Pro 3 for Sony's WF-1000XM6 and only lasted a weekI thought the more expensive earbuds would win. I was wrong.Dave CarrVideo Producer/Writer3 headphones I would buy instead of the AirPods Max 2These premium headphones deliver class-leading ANC, longer battery life, and more flexibility for less money.Dave CarrVideo Producer/WriterSony somehow made the name of its new headphones even worseNobody knows what it means, but it's provocative.Adam BirneyManaging EditorMore Wired Earbuds
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