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Sony

Sony INZONE E9

Name: Sony INZONE E9
Brand: Sony
SKU: B0FJ2V3CDY
Price: 133.00 USD

Current price · Amazon US

$133

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Price last checked 3h ago

Noise Isolation / ANC & sound

8.1/ 10

8.1

0.010.0

A 8.1 puts its noise isolation / ANC in the top 10% of wireless earbuds we've measured.

Measured on 133 of the 271 we've cataloged.

4/ 5

SoundMDAQS Overall

1.05.0

A 4 puts its audio quality in the bottom quarter of wireless earbuds we've measured.

Measured on 64 of the 271 we've cataloged.

Key specs

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)

Connectivity

Cable Type: 3.5mm single-ended, USB-C
Connection Type: Wired-3.5mm, wired-usb-c

Features

Inline Controls: No

Identity

Model Number: E9

Microphone

Microphone: No

Release

Msrp Usd: 149 USD

Sound

Driver Count: 1
Driver Size: 5 mm
Driver Type: Dynamic
Frequency Response: 10-20000 Hz
Frequency Response High Hz: 20000 Hz
Frequency Response Low Hz: 10 Hz

SoundGuys review

Read the full review ›

SOUNDGUYS rating

7.2/ 10

Recommended

Reviewed byJhaycee CalvezVideo Producer/WriterReviewed August 2025

Isolation8.1

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.

✓What we like

✓Great for competitive FPS games

✓Amazing passive isolation

✓Small and can be worn underneath headphones

✓Price

✕What could be better

✕Sounds Unexciting

✕Unfriendly for daily use

✕Bulky case

Read the full SoundGuys review →

Lab data

How we test ›

Objective measurements from the SoundGuys test lab — overlay other models to see how this one compares.

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0 of 4 overlay slots used

Sony INZONE E9SoundGuys Headphone Preference Curve

Measured frequency response (dB) against the SoundGuys house target — the dashed curve. The closer the measured line tracks the target, the more neutral the tuning; peaks ride above the target, dips fall below it.

Frequency response — measurement data

Sony INZONE E9: frequency response, as measured in the SoundGuys lab. Frequency in hertz.
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.

Passive isolation — measurement data

Sony INZONE E9: passive isolation, as measured in the SoundGuys lab. Frequency in hertz.
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