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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 172 of the 364 we've cataloged.
8.2/ 10
8.2
0.010.0
A 8.2 puts its durability / build quality in the top half of earbuds we've measured.
Measured on 173 of the 364 we've cataloged.
See the lab data ↓Frequency response · Isolation · Audio quality
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Key specs
Connection Type
Most commonWired-3.5mm63%Wired-usb-c25%Wired-lightning13%
Wired-3.5mm is the most common — on 63% of the 40 wired earbuds we've cataloged (of 41).
Cable Type
Most common3.5mm single-ended64%Usb-c28%Mmcx detachable6%Lightning3%
3.5mm single-ended is the most common — on 64% of the 36 wired earbuds we've cataloged (of 41).
Earbud Form Factor
In-earMost commonIn-ear86%Earbud (flat)8%Others5%
In-ear is the most common — on 86% of the 37 wired earbuds we've cataloged (of 41).
Microphone
NoTrue82%False18%
False appears on 18% of the 38 wired earbuds we've cataloged (of 41).
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 E9 Frequency Response (measured on a B&K 5128)
Click a line or a legend entry to highlight it. Click again to clear.Tap a legend entry to highlight its line. Tap again to clear.
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 | -7.1 |
| 25 | -5.8 |
| 32 | -4.4 |
| 40 | -3.1 |
| 50 | -2.0 |
| 63 | -1.1 |
| 80 | -0.5 |
| 100 | -0.0 |
| 125 | 0.2 |
| 160 | -0.2 |
| 200 | -0.9 |
| 250 | -0.2 |
| 315 | -0.7 |
| 400 | -2.1 |
| 500 | -2.3 |
| 630 | -1.7 |
| 800 | -1.2 |
| 1000 | -0.4 |
| 1250 | 1.1 |
| 1600 | 3.4 |
| 2000 | 6.2 |
| 2500 | 8.2 |
| 3150 | 5.6 |
| 4000 | 3.0 |
| 5000 | 4.5 |
| 6300 | 4.9 |
| 8000 | 1.7 |
| 10000 | -7.3 |
| 12500 | -8.7 |
| 16000 | -12.6 |
| 20000 | -16.8 |
Sony INZONE E9 Attenuation (measured on a B&K 5128)
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Solid lines: 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 MDAQS
Multi-Dimensional Audio Quality Scores, Scale 1 - 5
Mean opinion score
4.1
4.1
3.5
4.0
TimbreDistortionImmersivenessOverall
Virtual mean opinion scores (MOS) on a 1–5 scale, modeled from the measured response by HEAD acoustics’ MDAQS (Multi-Dimensional Audio Quality Score) model. 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 reviews are not paid for, not solicited from specific owners, and not rewritten by us: at most we proofread typos, which is shown on the review’s own page and which the author can undo. The commission SoundGuys may earn on this page comes from retail links, never from owner reviews.
Own the Sony INZONE E9?
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Questions from readers
What readers ask about the Sony INZONE E9, answered by the people who own it.
Nobody has asked the owners yet.
Ask the first question →Features & Opinions
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