






🎧 Elevate your sound game—because average audio is so last year.
The Sennheiser CX 300S are premium in-ear headphones featuring advanced driver technology for detailed sound and enhanced bass. Equipped with a built-in microphone and universal smart remote, they offer effortless call and music control. Their ergonomic silicon rubber design provides effective noise isolation, while the rugged, tangle-free cable ensures durability. Lightweight at 12 grams, these headphones are compatible with phones and music players via a 3.5mm jack, making them an ideal choice for professionals seeking high-quality audio on the move.
| Wireless communication technology | Bluetooth |
| Included components | Sennheiser CX 300S In-Ear Headphones with Universal Smart Remote - White |
| Age range (description) | Adult |
| Material | Silicon rubber |
| Specific uses for product | Music |
| Recommended uses for product | Calling |
| Compatible devices | Phones and music players |
| Control type | Call Control |
| Cable feature | Tangle Free |
| Item weight | 12 Grams |
| Water resistance level | Not Water Resistant |
| Package type | Standard Packaging |
| Unit count | 1.0 Count |
| Style | Closed |
| Control method | Remote |
| Number of items | 1 |
| Product Dimensions | 100 x 1.5 x 0.03 cm; 12 g |
| Item model number | 508594 |
| Connector | 3.5mm Jack |
| Hardware Interface | 3.5mm Audio |
| Material Type | Silicon rubber |
| Size | Único |
| Item Weight | 12 g |
M**N
Great solid performer
Excellent earphones extra strong lead great sound
C**5
Great Ear-canal Headphones.
Note 1: This is only the 2nd pair of ear-canal headphones I have used. Note 2: I have bought these for music listening purposes only. Pros: They are lightweight, comfortable and come very well packed. They have good length of cord and provide very good sound from: cassette player, Android Phone and mp3 player (Boom!). Was very impressed. There are numerous ear tips supplied but I found Aiivioll Silicone Ear Tips give more bass and fitted my ears better. I found also that you do not need high volume as they have high sensitivity. This means the battery driven or rechargeable devices should be able to play for longer. Cons. Wire noise can be experienced when cable banged/tapped due to high sensitivity.
P**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.
N**B
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
A**.
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.
J**N
More of regression than an improvement on previous models
I'm gonna have to find another brand than Sennheiser I like. Their products are just... now built to last. This is the third pair of CX-branded earbuds I've bought and none have lasted beyond two years. After a few months, the ends of cables turn to literal mush - apparently readily dissolving on light exposure to skin oils or body heat. A few months later, one of the earbuds will stop working and that'll be it. Unfortunately, this new design with titled earpieces is just both less comfortable and a worse fit. There are far more sharp uncomfortable edges in contact with my ear, and they pull out incredibly easily while also feeling like they're fitted in too deeply. Even a slight motion of the stiff cable will pull them loose, or they'll just pop out on their own while I'm completely stationary. The CX100 already had a stiffer cable than the pair before that and those I could tug on and not pull them loose, these however don't want to stay in even when jammed in uncomfortably. The larger earplug size is also just plain uncomfortable, while the default appears too small in comparison to the CX100's perfect fit. They're not interchangeable earplugs though, so I can't simply swap them over. Sound quality is fine, too bass heavy (I've no idea what the commenter complaining about there being too little is going on about), but that's something that I can adjust to and maybe something that'd lessen over time. But even having them a couple of days they're simply not comfortable, and I'm already aware they're not built to last. Even with an even thicker cable yet, I'm aware in a few months it'll turn soft and peel off, and then a few months later I'll lose sound on one side. That's just a constant of their construction quality. The thicker cable (and volume control) also doesn't let you loop it around your ear, which often helped with a secure fit or to get rid of cable noises. So that's off the table too. This is a real disappointment across the board. I already resent paying for a new pair every two years because of their material choice, but taking a product that fits perfectly and making it atrociously uncomfortable as well as just more expensive? It's just a regression.
D**M
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?
J**H
Excellent sound for the price
Excellent earphones. I've had Bowers & Wilkins earphones in the past and I must say Sennheiser's top them. My first ever pair of Sennheiser's was over a decade ago when I got the CX300's. The CX300S is newer, has a modern design and a button to pause tracks, also a mic for calls. I am very happy with my purchase. For less than £20 you will not find better earphones. Trust me on this one I know what I'm talking about!!
Trustpilot
1 month ago
3 days ago