Skip to content

Sennheiser CX 300S White Earphones


Barcode: 4044155245073

  • Format: Earphones
Click & Collect

Get it delivered to a store near you with FREE Click & Collect available on this product.

Ring & Reserve

Can't wait to get your hands on this? Ring to reserve at your local store, subject to availability: 03333 230 667

There was an error adding this product to your basket. Please try again.

Delivery to the UK only
Free UK delivery on orders over £20

Usually dispatched within 24 hours
  • Description

  • Delivery and Returns

  • Description

    Boost your sound with Sennheiser’s CX 300S earphones which offer amazingly detailed sound reproduction and enhanced bass response thanks to Sennheisers 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.

    German Engineering

    Precision German engineered transducers ensure detailed, dynamic sound with exceptional balance and extended bass response.

    Smart Remote

    The one button inline smart remote conveniently provides play and pause for music and to take calls without needing to touch your phone.

    Personalized Fit

    Four sizes (XS, S, M, L) of silicon ear adapters are included to provide individualized fit for comfort and improved performance.

    Noise Isolation

    The in-ear design effectively blocks ambient noise improving the listening experience.

    Product Features

    • 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

    Tech Specs

    • 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 - Ear-canal
    • Jack plug - 3.5 mm angled
    • Cable length - 1.2 m
    • Transducer principle - Dynamic
    • Weight - 12 g
    • Earpad size - XS;S;M;L
    • Pick-up pattern - Omni directional
    • Microphone sensitivity - -44dBV/Pa
    • Acoustics - Closed
    • Sensitivity - 118 dB SPL @ 1 kHz, 1V RMS
    • Ear pad material - Silicon rubber
  • Delivery and Returns

    When will my order arrive?

    • If the items are in stock, we’ll aim to dispatch them within 24 hours of your order being placed.  
    • Orders sent via Royal Mail 48® are usually received within two to five working days, including Saturdays. 
    • Orders sent via the Royal Mail 24® service will be dispatched the same day if ordered by 2pm, Monday to Friday (excluding public holidays).
    • We will aim to dispatch pre-orders so that you receive them on the release date.
    • Where an item is 'Back in stock soon', we'll aim to receive more stock within a week and will dispatch any orders once the shipment has arrived.
    • Certain items can take longer to source than the estimated week, particularly during busy trading periods and may take longer to arrive at the warehouse. In this instance, we'll send weekly updates to keep you aware. 

    Delivery charges

    • Free delivery is available for most items when the order exceeds £20, but any exceptions will be clearly highlighted.
    • Selected items are only available for delivery via the Royal Mail 48® service and other items are available for delivery using this service for a charge.
    • Selected items are only available for delivery using Click & Collect to an hmv or FOPP store of your choice.
    • All delivery options and any charges that are applicable will be shown at the checkout.

    Will you tell me when my order is on its way?

    • We will email you as soon as each item is ready to be dispatched so you know when to expect them, but you can also check the status of your order in your account.
    • We don’t always ship everything together so check your dispatch email for more details - we’ll send you a dispatch email per parcel.
    • If your order contains items that are out of stock, we’ll ship the in-stock items as soon as we can and will dispatch the out-of-stock items as soon as we’ve received more stock in the warehouse
    • For items that are dispatched using our standard service, we ask that you wait 14 days from the date of dispatch before reporting any items as undelivered.


    • We've extended our returns policy for the Christmas period to offer you more flexibility with your purchases. You can return items bought on any time in November and December 2021 right up until Monday 31st January 2022, provided that they are returned unopened, unused, and in perfect condition.
    • New! FREE returns with InPost Lockers for items bought during November and December 2021 until 31st January 2022. Available 24/7 and no printing required. Find more information in our Help Centre.
    • Some exclusions apply, please visit our Help Centre for more details. 

Sign-up for emails

Sign-up for emails

Sign-up for emails

I'd love to hear about offers and promotions from hmv*