Sennheiser CX 300S Ear Canal Headphone with Universal Smart Remote – Red
Original price was: £26.99.£23.49Current price is: £23.49.
Price: £26.99 - £23.49
(as of Jun 18, 2025 03:49:46 UTC – Details)
Sennheiser earphones, compatible with smartphones, detailed expression and polished bass sound.
Product Weight: Approx. 0.4 oz (12
Model: Dynamic In-Ear
Cable Length: 4.6 ft (1.2 m) Y-type
Plug format: 3.5mm stereo mini plug L type
Impedance: 18Ω
Frequency response: 17 – 21,000 Hz
Sensitivity: 118dB
Warranty: 2 years
Accessories: Ear adapter set (XS/S/M/L), soft pouch.
Is discontinued by manufacturer : No
Language : English, English, English, English, English
Product Dimensions : 100 x 1.5 x 0.03 cm; 12 g
Manufacturer : ゼンハイザー(Sennheiser)
ASIN : B07N246ZPJ
Item model number : 508595
Country of origin : China
Sensitivity: 118dB
Accessories: Ear adapter set (XS/S/M/L), soft pouch
Plug Shape: 3.5mm Stereo Mini Plug L-Type
Impedance: 18Ω
Cable Length: 4.6 ft (1.2 m) Y-type
Frequency response: 17Hz – 21,000Hz
Product Weight: Approx. 0.4 oz (12
This model is compatible with Sennheiser earphones
Customers say
Customers have mixed opinions about the headphones’ sound quality, with some praising the excellent sound and surprising noise cancellation, while others find it disappointing. Similarly, the build quality receives mixed feedback, with some noting good construction while others report they are too flimsily built.
13 reviews for Sennheiser CX 300S Ear Canal Headphone with Universal Smart Remote – Red
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Original price was: £26.99.£23.49Current price is: £23.49.
Daisy Graham –
Good Headphones
These are great headphones, I’ve bought a number of pairs over the past few years. They don’t break easily (my partner is just great at breaking headphones). Microphone works well and sound is great but what else would you expect from Sennheiser headphones?
Rose –
Long lasting product
I love these earphones. Ive had mine for about 5 years now and they are still going! Usually earphones i get are cheap and they last about a year before one side breaks or the wires break or something but these ones? Amazing. The sound quality is really good they can get really loud if you want them too and they are comfortable. They are also good at blocking out the noise around you if you put them in without anything playing. Honestly the best wired earphones ive ever owned i even got the other colours to give to my family and they love them too.
P –
Good sound quality,well made.
These wired ear buds give well rounded sound with a bit extra bass.A good seal in ear is easy to achieve with the selection of silicone cups that are in the box. As a result outside noise is interference is markedly reduced.Cable entanglement is not a concern due to the type of cable used.The in-cable switch start/stop and track advance works well.My only niggle is the 3.5 mm jack is in some cases a bit tight to plug in or remove.Overall a good product in my opinion.
Anthonin L. –
Highly disappointing
Got those as I wanted a simple headset, wired with a mic, in replacement of my beloved lost Momentum In-Ear (wired version, which is not sold anymore). I love Sennheiser sound signature, so those seemed to be the best option around.But they’re clearly not. They sound almost like a cheap free pair of earphone that would be offered along side a smartphone. As a result, I’m barely using them. For some calls maybe, when I can be bothered to take them out. I’m not enjoying listening to any music on those. An oddity in my history of buying Sennheiser.Comfort is good, nothing to tell around this.Build quality: well the core of it might be sturdy, but the little plates (where the Sennheiser logo is engraved on the earpiece outer side) just fell off (unglued itself), on both side, after a few weeks. It really displays the cheapness of it.I know they’re not the same range as the Momentum, but for the price I had way better experience with Sony products in the past. A shame.
Nette Bob –
Great sound and tough
The sound is excellent, you can buy better quality sound but it is at least £20 more expensive and will not be as rugged. I have been through loads of in ear headphones as I listen to audiobooks and music all day and they usually die due to being caught on something or having appallingly shoddy connections to the cables that fray. Whether expensive or cheap they have all failed in less than a year, Soundmagic, Betron twice, Sony, a pack of three cheapies and five Sennheiser until this pair of Sennheiser CX300S. Obviously quality has improved. If I was to niggle about something, the cable is a bit long but that will be a plus to some people
Geth –
Get weirdly squished and stop sound coming through when moving
I’ve always used Sennheiser headphones, and they have so far served me well, but these are a bit of a swing and miss. Somehow the design is such that if you are wearing them lying down or while walking/running, the in-ear bits will get “stuck” in your ear canal in such a position that the sound stops coming through and you have to readjust them. I’ve never had this problem before, and unfortunately even using the smaller set of ear buds in the box doesn’t work because those are too small for me. The larger ones just make the issue worse. To compound matters, the shape of the actual solid part of the headphones is non-standard, so I couldn’t even use the ear buds from any of my old headphones because they don’t fit. Quite frustrating!
Anthony. –
Punchy bass
These headphones are very well made a nice thicker than normal cable so I would like to think it will last a long time.Great sound with a nice punchy base and a very clear mid-range.I’ve been buying Sennheisers since my mid-teens and they’ve always performed.Fantastic pair of headphones 5 all day long .
Northern Soul –
Superb sound and surprisingly good noise cancelling
After trying out extremely disappointing bluetooth earbuds (Kinganga CVC8.0) and another disappointing set of mobile headphones (Philips SHQ1200/10 ActionFit) I finally found theses. What a difference! Amazing sound, excellent definition and depth with a surprising range from 17Hz to 21000Hz. The fact that I can switch between listening to music and making calls with the built-in remote and mic is an added bonus. Only got them yesterday, so longevity is still to be tested.
CS –
Great for conference calls. Noise cancellation is great, so I usually put on one side of the ear, in order that I can hear myself talk with the other. When not on calls, the noise cancellation on both ears with the music of your choice does provide good focus.With regards to listening to music, it does have a good bass, but at default (without any form of settings from your computer), it’s great listening for vocals such as Adele and classical pieces.The ear piece fits comfortably, make is great and looks good too. It fits my needs overall, so giving 5 stars.
Tenzin –
Lacks bass. Old Sennheiser CX 300 were better audio quality wise, even though these were at least 5 years old. Expected better sound quality from Sennheiser, this is a downgrade.
Quentin S. –
Bon produit, que j’utilise depuis 2023, fonctionne très bien encore en 2025
Stefan Berner –
Passen perfekt und verschwinden im Ohr.Auch für selbsternannte Hördiagnostiker ein Träumchen!Für den Preis kann man hier nicht mehr erwarten.Etwas basslastig, aber das ist schön wenn man etwas leiserhört.Vorsicht beim aufdrehen ist angesagtBitte bestellen und nicht nachdenken.Das beste ist das nie wieder im Bett nach Bluetooth suche ð¤ð¤
Ricardo M. –
Te da un buen sonido, el cable es antienredos, son cómodos en fin estoy muy satisfecho con la compra