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Sennheiser CX 275S Review | 93 Data compared

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  • Avg. price in UK: ~£55
  • Avg. price in US: ~$70
  • Form factor: in-ear
  • Connectivity: wired
  • Battery life: N/A hours
  • Active noise cancellation (ANC): no

Sennheiser CX 275S review. Compare 93 technical specifications and user reviews to see how it ranks among headphones and if it is worth buying.

5.8

Overall score

What it is: An overall evaluation of the headphones' quality, based on technical analyses and user reviews.

When it matters: When you need a quick reference to identify the best headphones on the market.

Score components:

80.0%

5.1

Technical Score

20.0%

8.7

User score

Good
5.1

Technical Score

What it is: An assessment of the headphones' technical performance, covering key areas such as sound quality, noise cancelling, microphone performance, battery life, comfort, connectivity, features, and build quality.

When it matters: When you want to compare headphones based on technical performance and available features.

Score components:

52.0%

5.1

Sound

20.0%

4.1

Features

10.0%

8.3

Design

8.0%

6.5

Connectivity

6.0%

1.0

Battery

4.0%

4.5

Calls & Controls

Good
8.7

User score

What it is: A rating that combines user reviews and the total number of reviews received by the headphones.

When it matters: When you want to understand how headphones perform in real listening and how reliable they are in terms of comfort, audio quality, battery life, and long-term use.

Score components:

70.0%

8.2

User reviews

30.0%

10

Popularity

User score:
United Kingdom
amazon
4.1
(27732)
United States
Amazon_logo.png
4.1
(27732)

(Reviews last updated: June 2026)

Excellent
  • 2.1
    Gaming

    Score components:

    35.0%

    0.0

    Audio latency

    25.0%

    0.0

    Low-latency game mode

    20.0%

    10

    Can be used as a headset

    12.0%

    1.0

    Noise-canceling microphone

    8.0%

    0.0

    Battery life

  • 2.1
    Travel

    Score components:

    28.0%

    1.0

    Active noise cancellation (ANC)

    24.0%

    0.0

    Battery life

    18.0%

    10

    Weight

    16.0%

    0.0

    Multipoint support

    14.0%

    0.0

    Ambient sound mode

  • 2.7
    Calls

    Score components:

    28.0%

    1.0

    Noise-canceling microphone

    24.0%

    10

    Can be used as a headset

    18.0%

    0.0

    Multipoint support

    16.0%

    0.0

    Battery life

    14.0%

    0.0

    Companion app

  • 5.0
    Workout

    Score components:

    28.0%

    10

    Weight

    24.0%

    1.0

    Water resistance

    20.0%

    4.0

    IP rating

    16.0%

    0.0

    Battery life

    12.0%

    10

    Can be used as a headset

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Best prices in UK

Best rankings

?

Available: ranking among products currently available (including other versions of this product).
All: ranking among all products in the database.

Verdict

The Sennheiser CX 275s is a lightweight (15g), wired in-ear headset featuring 16-ohm impedance and high-powered dynamic drivers that deliver a 'bass-driven' frequency response from 17 Hz to 23,000 Hz. Designed for universal smartphone compatibility via a gold-plated 3.5mm jack, it includes an inline omnidirectional microphone and a single-button remote for managing calls and tracks on Android, iOS, and other platforms. Main pros include its powerful bass performance, comfortable ergonomic fit with three sizes of ear adaptors, and the inclusion of a storage pouch and adapter cable. However, notable cons include a thin cable prone to tangling, a lack of volume controls on the remote, and a narrow soundstage that may feel muddy to some listeners.

Technical Specifications of Sennheiser CX 275S

Technical Score

What it is: An assessment of the headphones' technical performance, covering key areas such as sound quality, noise cancelling, microphone performance, battery life, comfort, connectivity, features, and build quality.

When it matters: When you want to compare headphones based on technical performance and available features.

Score components:

52.0%

5.1

Sound

20.0%

4.1

Features

10.0%

8.3

Design

8.0%

6.5

Connectivity

6.0%

1.0

Battery

4.0%

4.5

Calls & Controls

5.1
Sennheiser CX 275S has a technical score of 5.06 points, which is higher than that of 55% of products in this category.
User score

What it is: A rating that combines user reviews and the total number of reviews received by the headphones.

When it matters: When you want to understand how headphones perform in real listening and how reliable they are in terms of comfort, audio quality, battery life, and long-term use.

Score components:

70.0%

8.2

User reviews

30.0%

10

Popularity

User score:
United Kingdom
amazon
4.1
(27732)
United States
Amazon_logo.png
4.1
(27732)

(Reviews last updated: June 2026)

8.7
Sennheiser CX 275S has a user score of 8.74 points, which is higher than that of 77.4% of products in this category.
Popularity
What it is: An indicator based on the number of reviews received by the headphones.
When it matters: When you prefer headphones that have already been chosen and reviewed by many other users.
10
Sennheiser CX 275S has a popularity of 10 points, which is higher than 71.9% of products in this category.
Ratio quality/price

What it is: An indicator that combines the headphones' overall rating with their cost.

When it matters: When you are looking for headphones that offer a strong balance of performance, features, and price.

Score components:

60.0%

5.8

Overall score

40.0%

10

Price

7.1
Sennheiser CX 275S has a quality-to-price ratio of 7.1 points, which is higher than 65.7% of products in this category.
Active noise cancellation (ANC)
What it is: Reduces background noise using active technology
When it matters: When blocking office, travel, or aircraft noise is a priority.

Importance: HIGH

no
Sennheiser CX 275S does not support active noise cancellation. 27.4% of headphones support active noise cancellation.
Driver type
What it is: Type of speaker driver technology used
When it matters: When the underlying sound character and driver technology matter to you.

Importance: MEDIUM

dynamic
Driver size
What it is: Diameter of the speaker driver unit
When it matters: When you want extra hardware context behind how the headphones may handle bass weight, scale, or overall presentation.

Importance: MEDIUM

?
Number of drivers
What it is: Total number of speaker drivers per earcup
When it matters: When multi-driver designs are part of your buying criteria.

Importance: LOW

1
Sennheiser CX 275S uses 1 drivers, equal to 96% of headphones.
Lowest frequency
What it is: Lowest audio frequency the headphones can reproduce
When it matters: When deeper bass extension matters for your music or movie listening.

Importance: MEDIUM

Good value: <=10 Hz

17 Hz
Sennheiser CX 275S reaches a lowest frequency of 17 Hz, lower lowest frequency than 53.4% of headphones and equal to 0.9% of headphones.
Show more
Noise-canceling microphone
What it is: Built-in microphone reduces background noise during calls
When it matters: When you take calls in busy spaces and want your voice to stay clearer.

Importance: MEDIUM

no
Sennheiser CX 275S does not support a noise-canceling microphone. 45.6% of headphones support noise-canceling microphones.
Can be used as a headset
What it is: Shows whether the headphones can handle voice chat and calls in addition to normal audio playback.
When it matters: When one pair needs to cover music, calls, meetings, and gaming chat.

Importance: MEDIUM

yes
Sennheiser CX 275S is headset-ready, 84.7% is not. 15.3% of headphones can be used as headsets.
Number of microphones
What it is: Total number of built-in microphones
When it matters: When call pickup quality and beamforming support matter to you.

Importance: LOW

Good value: >=2

1
Sennheiser CX 275S has 1 microphones, more microphones than 25.9% of headphones and equal to 52.2% of headphones.
Boom microphone
What it is: Includes detachable boom microphone for voice clarity
When it matters: When you need stronger voice clarity for gaming, streaming, or work calls.

Importance: LOW

no
Sennheiser CX 275S does not include a boom microphone. 15.6% of headphones have a boom microphone.
Microphone SNR
What it is: Signal-to-noise ratio of the microphone
When it matters: When call clarity matters and you want your voice picked up more cleanly instead of buried in background hiss.

Importance: LOW

Good value: >80 dB

?
Show more
Connectivity
What it is: Available connection methods (wired, wireless, Bluetooth, etc.)
When it matters: When the headphones need to match how you listen across wired and wireless devices.

Importance: HIGH

wired
Sennheiser CX 275S supports wired connectivity, equal to 52.6% of headphones.
Bluetooth version
What it is: Version of Bluetooth technology supported
When it matters: When wireless stability, efficiency, and feature support matter more than treating Bluetooth as a box-check spec.

Importance: MEDIUM

Good value: >=5.0

N/A
Maximum Bluetooth range
What it is: Maximum wireless operating distance from source device
When it matters: When you move around rooms and want fewer dropouts from your source device.

Importance: LOW

Good value: >=10 m

N/A
Audio latency
What it is: Delay between audio and video in wireless mode
When it matters: When you watch video or play games and need sound to stay in sync.

Importance: HIGH

Good value: <60 ms

N/A
Multipoint support
What it is: Supports simultaneous connections to multiple devices
When it matters: When you switch often between a phone and a laptop during the day.

Importance: MEDIUM

N/A
Show more
Ambient sound mode
What it is: Allows external sounds to pass through for awareness
When it matters: When you need to stay aware of traffic, voices, or announcements.

Importance: MEDIUM

N/A
EQ support
What it is: Allows customization of sound profile via equalizer
When it matters: When the stock tuning is not enough and you want to shape bass, mids, or treble to match your taste.

Importance: MEDIUM

no
Sennheiser CX 275S does not support EQ customization. 23.3% of headphones support EQ.
Companion app
What it is: Dedicated mobile app for customization and updates
When it matters: When software customization, updates, and extra controls matter.

Importance: MEDIUM

N/A
Adjustable ANC levels
What it is: Allows adjustment of noise cancellation intensity levels
When it matters: When you move between quiet rooms, offices, streets, and public transport and do not want one ANC setting for every situation.

Importance: LOW

Good value: >=4

N/A
Voice assistant support
What it is: Compatible with voice assistants like Siri, Alexa, or Google Assistant
When it matters: When hands-free control is part of your daily routine.

Importance: LOW

yes
Sennheiser CX 275S supports voice assistants. 39.2% of headphones support voice assistants.
Show more
Battery life
What it is: Playback time on a single charge
When it matters: When you commute, travel, or work long shifts and do not want charging breaks to interrupt listening.

Importance: HIGH

Good value: >45 hours

N/A
Battery life with ANC
What it is: Playback time with active noise cancellation enabled
When it matters: When you plan to keep noise cancellation on for most of the day.

Importance: HIGH

Good value: >40 hours

N/A
Charging time
What it is: Time required for a full battery charge
When it matters: When you often need the headphones ready again after short breaks.

Importance: MEDIUM

Good value: <=2 hours

N/A
Quick charge
What it is: Provides quick playback time with short charging period
When it matters: When a short top-up needs to deliver useful playback before you leave.

Importance: MEDIUM

N/A
Battery capacity
What it is: Total energy storage of the internal battery
When it matters: When you are estimating how much battery headroom the design may have before relying only on the official runtime claim.

Importance: MEDIUM

Good value: >=720 mAh

N/A
Show more
Brand name
What it is: The manufacturer or brand of the product.
When it matters: When you prefer a specific ecosystem, support network, or design philosophy.

Importance: MEDIUM

Sennheiser
Form factor
What it is: Overall design type of the headphones (over-ear, on-ear, in-ear, etc.)
When it matters: When comfort, portability, and isolation depend on the overall headphone style.

Importance: HIGH

in-ear
Weight
What it is: Total weight of the headphones
When it matters: When long listening sessions make wearing comfort more important.

Importance: MEDIUM

Good value: <150 g

15 g
Sennheiser CX 275S weighs 15 g, lighter than 88.7% of headphones and equal to 0.8% of headphones.
Acoustic design
What it is: Type of acoustic design (open-back, closed-back, semi-open)
When it matters: When you need the right balance of isolation, leakage, and soundstage.

Importance: HIGH

closed-back
Clamp force
What it is: Amount of clamping pressure applied to the head
When it matters: When comfort and fit security matter during long sessions.

Importance: MEDIUM

N/A
Show more

Sennheiser CX 275S vs the average headphone

  • 93.1% lower weight
    Sennheiser CX 275S is lighter than the average headphone (15 g vs 218 g). The average pair of headphones weighs 218 g.
    What it is: Total weight of the headphones
    When it matters: When long listening sessions make wearing comfort more important.

    Importance: MEDIUM

    Good value: <150 g

    Sennheiser CX 275S is lighter than the average headphone (15 g vs 218 g). The average pair of headphones weighs 218 g.15 g vs 218 g
  • 19 dB/mW higher sensitivity
    Sennheiser CX 275S has a higher sensitivity than the average headphone (121 dB/mW vs 102 dB/mW). The average headphones have sensitivity of 102 dB/mW.
    What it is: Sound pressure output level per unit of input power
    When it matters: When you plan to use weaker sources like phones, handhelds, or entry-level dongles and still want enough volume.

    Importance: MEDIUM

    Good value: >=106 dB/mW

    Sennheiser CX 275S has a higher sensitivity than the average headphone (121 dB/mW vs 102 dB/mW). The average headphones have sensitivity of 102 dB/mW.121 dB/mW vs 102 dB/mW
  • Direct 3.5 mm plug
    Sennheiser CX 275S includes a direct 3.5 mm plug, the average headphone does not. 38.8% of headphones have a 3.5 mm male connector.
    What it is: Shows whether the headphones end in a built-in 3.5 mm male plug instead of relying on a separate detachable cable.
    When it matters: When direct wired compatibility with older devices or adapters matters.

    Importance: MEDIUM

    Sennheiser CX 275S includes a direct 3.5 mm plug, the average headphone does not. 38.8% of headphones have a 3.5 mm male connector.
  • In-line controls
    Sennheiser CX 275S includes in-line controls, the average headphone does not. 36.4% of headphones support in-line controls.
    What it is: Controls available on in-line remote of wired cable
    When it matters: When your wired setup depends on cable-mounted buttons or call controls.

    Importance: LOW

    Sennheiser CX 275S includes in-line controls, the average headphone does not. 36.4% of headphones support in-line controls.
  • 3,000 Hz higher treble extension
    Sennheiser CX 275S has a higher highest frequency than the average headphone (23,000 Hz vs 20,000 Hz). The average headphones reach a highest frequency of 20,000 Hz.
    What it is: Highest audio frequency the headphones can reproduce
    When it matters: When treble extension and overall frequency reach matter to you.

    Importance: MEDIUM

    Good value: >=24000 Hz

    Sennheiser CX 275S has a higher highest frequency than the average headphone (23,000 Hz vs 20,000 Hz). The average headphones reach a highest frequency of 20,000 Hz.23000 Hz vs 20000 Hz
  • 18 dB SPL higher sound pressure level
    Sennheiser CX 275S has a higher sound pressure level than the average headphone (121 dB SPL vs 103 dB SPL). The average headphones reach a sound pressure level of 103 dB SPL.
    What it is: Output loudness level of the headphones, usually measured in dB. It helps compare how loud a model can play under similar conditions.
    When it matters: When you need a rough idea of how loud the headphones can get before you pair them with a weaker source.

    Importance: LOW

    Good value: >=108 dB SPL

    Sennheiser CX 275S has a higher sound pressure level than the average headphone (121 dB SPL vs 103 dB SPL). The average headphones reach a sound pressure level of 103 dB SPL.121 dB SPL vs 103 dB SPL
  • 9.3% higher user score
    Sennheiser CX 275S has a higher user score than the average headphone (8.74 vs 8.000).
    What it is: A rating that combines user reviews and the total number of reviews received by the headphones.
    When it matters: When you want to understand how headphones perform in real listening and how reliable they are in terms of comfort, audio quality, battery life, and long-term use.
    Sennheiser CX 275S has a higher user score than the average headphone (8.74 vs 8.000).8.74 vs 8
  • 2.15x more popular
    Sennheiser CX 275S is more popular than the average headphone (10.00 vs 4.646).
    What it is: An indicator based on the number of reviews received by the headphones.
    When it matters: When you prefer headphones that have already been chosen and reviewed by many other users.
    Sennheiser CX 275S is more popular than the average headphone (10.00 vs 4.646).10 vs 4.65
  • 93.1% lower weight
    Sennheiser CX 275S is lighter than the average headphone (15 g vs 218 g). The average pair of headphones weighs 218 g.
  • 19 dB/mW higher sensitivity
    Sennheiser CX 275S has a higher sensitivity than the average headphone (121 dB/mW vs 102 dB/mW). The average headphones have sensitivity of 102 dB/mW.
  • 3,000 Hz higher treble extension
    Sennheiser CX 275S has a higher highest frequency than the average headphone (23,000 Hz vs 20,000 Hz). The average headphones reach a highest frequency of 20,000 Hz.
  • 18 dB SPL higher sound pressure level
    Sennheiser CX 275S has a higher sound pressure level than the average headphone (121 dB SPL vs 103 dB SPL). The average headphones reach a sound pressure level of 103 dB SPL.
  • Direct 3.5 mm plug
    Sennheiser CX 275S includes a direct 3.5 mm plug, the average headphone does not. 38.8% of headphones have a 3.5 mm male connector.
  • In-line controls
    Sennheiser CX 275S includes in-line controls, the average headphone does not. 36.4% of headphones support in-line controls.

Total
Overall
Design
Sound
Connectivity
Calls & Controls
  • Fixed cable
    Sennheiser CX 275S has a fixed cable, while the average headphone has a detachable one. 62% of headphones have a detachable cable.
  • Tangle-prone cable
    Sennheiser CX 275S uses a tangle-prone cable, while the average headphone is easier to manage. 64.2% of headphones use a tangle-free cable.
  • Fixed cable
    Sennheiser CX 275S has a fixed cable, while the average headphone has a detachable one. 62% of headphones have a detachable cable.
    What it is: Cable can be removed or replaced
    When it matters: When you care about easier cable replacement, simpler storage, or the option to swap to shorter, longer, or upgraded leads.

    Importance: MEDIUM

    Sennheiser CX 275S has a fixed cable, while the average headphone has a detachable one. 62% of headphones have a detachable cable.
  • Tangle-prone cable
    Sennheiser CX 275S uses a tangle-prone cable, while the average headphone is easier to manage. 64.2% of headphones use a tangle-free cable.
    What it is: Cable designed to resist tangling
    When it matters: When you often carry wired headphones in a bag or pocket.

    Importance: LOW

    Sennheiser CX 275S uses a tangle-prone cable, while the average headphone is easier to manage. 64.2% of headphones use a tangle-free cable.
Total
Design

Graphic comparison of Sennheiser CX 275S and

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Third-party reviews

United Kingdom
amazon
4.1
27732 Reviews
United States
Amazon_logo.png
4.1
27732 Reviews

(Reviews last updated: June 2026)

What customers like about Sennheiser CX 275S?

  • Punchy, bass-driven sound signature ideal for EDM and bass-heavy genres
  • Lightweight and secure ergonomic fit that remains comfortable for long periods
  • High-quality inline microphone that provides clear call quality
  • Wide universal compatibility with most smartphones via the included adapter
  • Generous 2-year international warranty period
  • Included accessories such as a storage pouch and multiple ear tip sizes

What customers dislike about Sennheiser CX 275S?

  • Fragile, thin cables that are prone to tangling and durability issues
  • Single-button inline remote lacks dedicated volume controls
  • Bass can occasionally muffle the midrange, leading to a lack of clarity in vocals
  • High frequencies can sound tinny or harsh at higher volume levels
  • Narrow soundstage makes audio feel less immersive or 'open'

Expert reviews

H
head-fi.org
27/07/2012
New! Sennheiser CX 275: Pics 'n Words included - Head-Fi

The Sennheiser CX 275 review on Head-Fi highlights a budget-friendly, V-shaped sound earphone offering a comfortable, lightweight fit suitable for long listening sessions. Pros include punchy mid-bass, crisp treble without sibilance, and a microphone with clear voice quality and a tactile remote button. Conversely, the review notes significant drawbacks, including a lack of sub-bass...Read more

U
uk.pcmag.com
14/06/2013
Sennheiser CX 275s Review - PCMag UK

The Sennheiser CX 275s in-ear headphones earned a 3.5 Good rating from PCMag for delivering a powerful, distortion-free audio experience tailored specifically for bass enthusiasts on a budget of $69.95 direct. The review highlights several notable pros, including a comfortable, secure, and incredibly lightweight design with dark, metallic gray earpieces that stay firmly in place...Read more

P
pcmag.com
19/06/2013
Sennheiser CX 275s Review - PCMag

The Sennheiser CX 275s ($69.95) are budget-friendly, wired in-ear headphones featuring a lightweight, comfortable design with secure ear tips, an inline microphone, and a single-button remote. They are praised for delivering a powerful, distortion-free audio performance with heavily boosted bass that appeals to low-end enthusiasts. Conversely, the review notes that the intensely...Read more

W
whathifi.com
15/01/2013
Sennheiser CX275s review - What Hi-Fi?

The Sennheiser CX275s wired earbuds offer a balanced soundstage with a well-separated midrange and articulate treble, though the high frequencies can sound slightly hard. While they deliver a hefty amount of bass, it unfortunately lacks definition and rhythmic precision, which ultimately hurts the overall cohesion of the presentation. On the physical side, the crescent-shaped outer...Read more

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