Sennheiser CX 300S In-Ear Headphones with One-Button Smart Remote (Red)


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  • $49.95

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The CX 2.00 has been succeeded by the CX 300S. Boost your sound with Sennheiser’s CX 300S earphones which offer amazingly detailed sound reproduction and enhanced bass response thanks to Sennheiser’s transducer technology. The in-ear design reduces ambient noise to a minimum, and the included set of ear-adapters guarantees an individualized fit with four sizes (XS, S, M, L) to choose from. A Smart remote enables you to pause music and take calls across all devices.


  • Built-in microphone and remote for call and music control.
  • Ergonomic In-Ear design for ambient noise isolation and undisturbed listening.
  • Tough and tangle-free cable for long-lasting listening enjoyment.

What's in the box?

  • CX 300S earphones
  • Ear adapter set
  • (XS/S/M/L)
  • Storage pouch


  • Impedance
18 Ω
  • Frequency response (Microphone)
100 – 10,000 Hz (-10 dB)
  • Frequency response
17–21,000 Hz (-10 dB)
  • Sound pressure level (SPL)
118 dB
  • THD, total harmonic distortion
<0.5 % (1 kHz, 100 dB SPL)
  • Ear coupling
  • Jack plug
3.5 mm angled
  • Cable length
1.2 m
  • Transducer principle
  • Weight
12 g
  • Earpad size
  • Pick-up pattern
Omni directional
  • Microphone sensitivity
  • Acoustics
  • Sensitivity
118 dB SPL @ 1 kHz, 1V RMS
  • Ear pad material
Silicon rubber