Sennheiser CX 275 Universal In-Ear Headset

Model #504538

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Sennheiser 504538 1
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Weight 2.8 oz (0.8 kg)
Impedance 16 ohms
Frequency range Headphones: 17Hz - 23kHz
Microphone: 100Hz - 10kHz
Type In-ear
Maximum sound pressure level (spl) 121 dB
Sensitivity -44 dB
Connectors 1/8" (3.5 mm) Mini-stereo plug at the end of the cable
Cable length 47" (1.2 m)
Expert Reviews
Pc magazine.32817846
19 June 2013

The Sennheiser CX 275s combines serious bass response with a light, secure design, but these affordable earphones are not for everyone.

  • +

    Powerful, distortion-free audio performance with deep, boosted lows. Inline remote control and microphone for mobile devices. Comfortable, secure, lightweight fit.

  • -

    Can sound tinny or harsh at times. Boosted deep bass response not for purists. Inline remote has no volume controls.

Pro clockers.32822902
3 December 2014

Pairing up your smartphone or tablet with a good headset is essential for hand-free communication. It's also a good addition for mobile gaming and audio listening. When it comes to audio hardware, one of the most renowned brand for quality is Sennheiser.

Review head fi org.34136598
27 December 2013

These are amazing headphones for any basshead who desires a nice clean sound. Though the balance is a little bit wonky, the clarity is all registers is amazing. The sound isolation is decent. I use these in school hallways and can't hear anything or anyone if the volume is at 50%.

  • +

    Bass, Good Clarity, Isolation, Mic

  • -


29 September 2014

At around £30 in stores, these Sennheisers are the cheapest pair of headphones in our gruelling audio quality group test. Yet the CX275S perform admirably, making it down to the final three.

User Reviews
21 April 2015

If you can avoid it, try not getting anything from Action Packaged Inc. They were really slow processing my order, I couldn't get a hold of anyone who could help me cancel my order over the phone and they completely ignored my emails.

  • +

    - Low profile, so wearing ear muffs/180's doesn't make it uncomfortable. - Mic is a great feature on nose isolating earphones

  • -

    - Mids and highs aren't all that great. A lot of songs sound muffled and it's not something an equalizer can completely fix. - Cord tangles really easy. - Do not spend anything more than $80 on these.

B h photo.32817553
15 June 2015

I've tried a lot of in ear's because i consistently lose them, and Sennheiser has never disappointed. These have a good balanced sound and the mic is a really great touch. And they're priced so that they're cheaper then most others, without sacrificing any quality.

  • +

    Easy Controls, Good Sound Quality, Lightweight

Product Highlights
  • Frequency Range 17Hz - 23kHz
  • In-Line Mic and Hands-Free Remote
  • Universal Smartphone Compatibility
  • Multiple Sized Ear-Tips
  • Drawstring Storage Pouch Included
Average Expert Score
Average User Score
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