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Sennheiser CX 80U Wired In-Ear Earphones with USB-C Connector

BH #SECX80U • MFR #800125
3 reviews
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Sennheiser CX 80U Wired In-Ear Earphones with USB-C Connector
Key Features
  • Simple, Balanced In-Ear Headphones
  • Neutral Sound, No Extremes
  • Inline Remote and Microphone
  • Lightweight for Portability
Sennheiser is known for the high quality of all their audio gear, from pro audio microphones to earbuds for everyday use—and that's the ethos behind the CX 80U Wired In-Ear Earphones with Smart Remote. Lightweight to ensure portability, these earphones offer a smart USB-C remote cable to manage music and take phone calls, and an omnidirectional microphone with a clear pickup. The sound signature is neutral and well-balanced, with ambient noise isolation. The headphones include three sizes of eartips to ensure the best fit for your ears.
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Sennheiser CX 80U Overview

Sennheiser is known for the high quality of all their audio gear, from pro audio microphones to earbuds for everyday use—and that's the ethos behind the CX 80U Wired In-Ear Earphones with Smart Remote. Lightweight to ensure portability, these earphones offer a smart USB-C remote cable to manage music and take phone calls, and an omnidirectional microphone with a clear pickup. The sound signature is neutral and well-balanced, with ambient noise isolation. The headphones include three sizes of eartips to ensure the best fit for your ears.

UPC: 810091274736

Sennheiser CX 80U Specs

Key Specs
Wearing Style
Dual Wired Earbud
Number of Drivers
1 per Earpiece
Impedance
28 Ohms
Active Noise Cancellation
Not Specified by Manufacturer
Frequency Response
17 Hz to 20 kHz
Built-In Mic
Yes (on Cable)
Audio Connector
1x USB-C
Included Adapter
No
Headphone
Wearing Style
Dual Wired Earbud
Earpiece Design
Earbud (Intra-Concha)
Open/Closed-Back
Closed-Back
Sound Field
Stereo
Number of Drivers
1 per Earpiece
Driver Type
Dynamic
Driver Size
0.4" / 9.7 mm
Impedance
28 Ohms
Active Noise Cancellation
Not Specified by Manufacturer
Frequency Response
17 Hz to 20 kHz
Maximum Sound Pressure Level (SPL)
119 dB at 1 kHz / 1 Vrms
Built-In Controls
Yes (on Cable)
Microphone
Built-In Mic
Yes (on Cable)
Type
MEMS
Pickup Pattern
Omnidirectional
Frequency Response
100 Hz to 10 kHz
Connectivity
Wired Audio Connector
1x USB-C
Included Adapter
No
Cable Design
Non-Detachable
Cable Length
3.9' / 1.2 m
Physical
Color
Black
Weight
0.5 oz / 14.3 g
Packaging Info
Package Weight
0.105 lb
Box Dimensions (LxWxH)
4.6 x 3.9 x 1"

Sennheiser CX 80U Reviews

Not good quality

By Yang
Rated 1 out of 5
Date: 2026-02-28

One of the earbuds on my Sennheiser PMX 684i finally broke, and since that model has long been discontinued, I bought the Sennheiser CX 80U as a possible replacement. Unfortunately, it didn’t work out. Compared with the PMX 684i, the CX 80U’s bass performance is very disappointing. The PMX had deep, punchy, energetic bass that made music lively and enjoyable. In contrast, the CX 80U sounds thin and lacks the low-end presence I was expecting from a Sennheiser product. For my taste, the sound feels flat and unexciting. Because of the weak bass and overall less engaging sound, I’ve decided to return the CX 80U. It simply doesn’t come close to the sound signature I loved on the PMX 684i.

Poor build quality

By jordan
Rated 1 out of 5
Date: 2026-02-28

Poor quality from Sennheiser on this one. The small earbuds lack the structural rigidity required for any in-ear adjustments. It feels like any attempt at it and the cheap cabling is going to break. Didn't even bother giving them a listen so I can't comment on sound quality. If they fix their structural problem, I'll be happy to try them again.

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