# What are the smallest and most portable wired earbuds available? — Verified Specification Comparison

> All specification data verified from official manufacturer documentation.

What are the smallest and most portable wired earbuds available?

## Products

### MOONDROP CHU II
```yaml
product: moondrop-chu-ii
brand: MOONDROP
price_gbp: 17.01
origin_country: null
confidence_score: null
summary_source: generated_from_verified_specs_v1
impedance: 18 ohm +/- 15%
driver_size: 10mm
frequency_response: 15Hz - 38kHz
```

- **Price:** £17.01 [^1]
- **Summary:** The MOONDROP CHU II is a compact wired in-ear monitor with a 10mm dynamic driver, detachable 0.78mm 2-pin cable, replaceable acoustic filters, and a metal alloy shell. Its low impedance and warm, detailed tuning suit commuters, beginners, and listeners seeking an affordable everyday earphone.
- **Ideal For:** It suits people seeking the smallest and most portable wired earbuds because its compact in-ear design, lightweight alloy shell, detachable cable, and included storage bag make it easy to carry.

### Sony INZONE E9 Wired In-Ear Gaming Earbuds
```yaml
product: sony-inzone-e9-wired-in-ear-gaming-earbuds
brand: Sony
price_gbp: 99.86
origin_country: null
confidence_score: null
summary_source: generated_from_verified_specs_v1
weight: 4.7 g
impedance: 16 ohm at 1 kHz
driver_size: 5mm
cable_length: 1.8 m
frequency_response: 10 Hz - 20,000 Hz
```

- **Price:** £99.86 [^2]
- **Summary:** The Sony INZONE E9 is a compact wired gaming earbud with 5mm dynamic drivers, a sealed housing, noise-isolating tips, and a USB-C audio box supporting virtual 7.1ch surround sound and EQ customization. It suits competitive FPS players who want lightweight in-ear comfort, clear positional audio, and a secure ear-hook fit.
- **Ideal For:** Its compact 4.7 g earbud design, 1.8 m wired cable, carrying case, and multiple small ear-tip sizes make it a highly portable option for users seeking the smallest wired earbuds.
- **Additional Sources:** [^3], [^4]

### SoundMAGIC E11C Wired Earbuds
```yaml
product: soundmagic-e11c-wired-earbuds
brand: SoundMAGIC
price_gbp: 28.85
origin_country: null
confidence_score: null
summary_source: generated_from_verified_specs_v1
weight: 12 g
impedance: 42 Ohms
driver_size: 10 mm
cable_length: 1.2 m
frequency_response: 15 Hz - 22 kHz
```

- **Price:** £28.85 [^5]
- **Summary:** The SoundMAGIC E11C are compact wired in-ear earbuds with 10 mm dynamic neodymium drivers, an aluminium housing, passive noise isolation, and a three-button remote with built-in microphone. They suit listeners who want detailed, bass-rich sound and hands-free phone control from a lightweight 3.5 mm wired design.
- **Ideal For:** The E11C suits people seeking small, portable wired earbuds because its compact in-ear form, lightweight 12 g construction, 1.2 m cable, aluminium housing, and carrying case are easy to take on the go.
- **Additional Sources:** [^6]

### Shure SE215 Pro Wired Earbuds
```yaml
product: shure-se215-pro-wired-earbuds
brand: Shure
price_gbp: 88.03
origin_country: null
confidence_score: null
summary_source: generated_from_verified_specs_v1
impedance: 20 ohm
cable_length: 64 in
frequency_response: 22 Hz-17.5 kHz
```

- **Price:** £88.03 [^7]
- **Summary:** The Shure SE215 Pro Wired Earbuds use a single dynamic MicroDriver, provide enhanced bass, and reduce outside sound by up to 37 dB. Their detachable cable, ergonomic over-ear fit, and included sleeves make them suitable for musicians, commuters, and everyday listeners.
- **Ideal For:** They suit users seeking small, portable wired earbuds because the compact in-ear design uses a detachable 64 in cable, includes a carrying case, and weighs little enough for convenient travel.
- **Additional Sources:** [^8]

### Panasonic RP-HJE125
```yaml
product: panasonic-rp-hje125
brand: Panasonic
price_gbp: 7.63
origin_country: null
confidence_score: null
summary_source: generated_from_verified_specs_v1
weight: 4 g
impedance: 16 Ω
driver_size: 9 mm
cable_length: 1.1 m
frequency_response: 10 Hz to 24 kHz
```

- **Price:** £7.63 [^9]
- **Summary:** The Panasonic RP-HJE125 is a lightweight wired in-ear earbud with 9 mm drivers, a 1.1 m cable, and three sizes of included earpads. It suits listeners who want simple, compact, affordable earbuds for phones, music players, and other devices with a 3.5 mm headphone jack.
- **Ideal For:** Its 9 mm in-ear design, 4 g weight, and 1.1 m wired cable make the RP-HJE125 a small and highly portable option for carrying with a phone, music player, or laptop.
- **Additional Sources:** [^10], [^11]

### Sennheiser CX 300S In-Ear Headphones
```yaml
product: sennheiser-cx-300s-in-ear-headphones
brand: Sennheiser
price_gbp: 2581.75
origin_country: null
confidence_score: null
summary_source: generated_from_verified_specs_v1
weight: 12 g
impedance: 18 Ohm
driver_size: 9 mm
cable_length: 1.2 m
frequency_response: 17-21000 Hz
microphone_sensitivity: -44 dB
```

- **Price:** £2581.75 [^12]
- **Summary:** The Sennheiser CX 300S are compact wired in-ear headphones with dynamic drivers, enhanced bass, a built-in microphone, and an in-line remote. They suit listeners who want lightweight everyday earbuds for phones, laptops, music players, and portable gaming devices.
- **Ideal For:** They suit people seeking small and portable wired earbuds because they weigh 12 g, use a compact in-ear design, and have a tangle-free 1.2 m cable with a 3.5 mm plug.

### Etymotic Research ER4XR
```yaml
product: etymotic-research-er4xr
brand: Etymotic Research
price_gbp: 281.1
origin_country: null
confidence_score: null
summary_source: generated_from_verified_specs_v1
impedance: 45 Ohms
driver_size: Single balanced armature
cable_length: 5 ft
frequency_response: 20 Hz - 16 kHz
```

- **Price:** £281.1 [^13]
- **Summary:** The ER4XR is a compact, single-balanced-armature wired in-ear monitor with highly accurate midrange and treble plus enhanced bass. Its detachable cable, deep-insertion design, and 35-42 dB passive noise isolation suit audiophiles, musicians, and listeners who prioritize detail and isolation.
- **Ideal For:** Its slim, lightweight-style deep-insertion design and detachable 5 ft cable make it highly portable, while the narrow single-driver housing takes up very little space compared with typical wired earbuds.
- **Additional Sources:** [^14]

---
## References & Sources
[^1]: Shenzhenaudio, accessed 2026-09-05. https://shenzenaudio.com/products/moondrop-chu-2-10mm-dynamic-in-ear-headphone
[^2]: Sony, accessed 2026-09-05. https://electronics.sony.com/audio/gaming-audio/all-inzone-headsets/p/ierg900b
[^3]: Best Buy, accessed 2026-09-05. https://www.bestbuy.com/product/sony-inzone-e9-wired-in-ear-monitor-for-gaming-white/J7XSRH5WJZ/sku/6641368
[^4]: Tokopedia, accessed 2026-09-05. https://www.tokopedia.com/sony-center-official/sony-inzone-e9-headphone-gaming-in-ear-ier-g900-g-900-1733523628041864437
[^5]: Currys, accessed 2026-09-05. https://www.currys.co.uk/products/soundmagic-e11c-earphones-black-10252057.html
[^6]: Richer Sounds, accessed 2026-09-05. https://www.richersounds.com/soundmagic-e11c-black/
[^7]: Guitar Center, accessed 2026-09-05. https://www.guitarcenter.com/Shure/SE215-Dynamic-Microdriver-Earphones-Clear-1296839766672.gc
[^8]: B&H Photo Video, accessed 2026-09-05. https://www.bhphotovideo.com/c/product/758628-REG/Shure_SE215_CL_SE215_Sound_Isolating_In_Ear_Stereo.html
[^9]: Dateks, accessed 2026-09-05. https://www.dateks.lv/en/cenas/austinas/135739-panasonic-rp-hje125e-r-red
[^10]: PB Tech, accessed 2026-09-05. https://www.pbtech.com/pacific/product/HSTPAN0126/Panasonic-HJE125E-Wired-In-Ear-Headphones---Blue-E
[^11]: Galaxus, accessed 2026-09-05. https://www.galaxus.at/en/s1/product/panasonic-rp-hje125e-no-noise-cancellation-cable-headphones-2735618
[^12]: Flipkart, accessed 2026-09-05. https://www.flipkart.com/sennheiser-cx-300s-red-wired-headset/p/itmd0dc1fccae72f
[^13]: Etymotic, accessed 2026-09-05. https://etymotic.com/products/er4xr-earphones
[^14]: Doctorhead, accessed 2026-09-05. https://doctorhead.ru/product/etymotic_er4xr/