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🎧 Elevate your audio game—because your ears deserve the best.
The Sennheiser CX 300S In-Ear Headphones combine precision German engineering with a dynamic driver delivering a wide 17Hz to 21kHz frequency range. Featuring four sizes of silicone ear tips for a custom fit, an inline smart remote for effortless control, and a tangle-resistant cable with metal casing, these wired earbuds offer superior sound clarity, noise isolation, and durability—perfect for professionals who demand quality and comfort without wireless fuss.







| ASIN | B07N9J4BTK |
| Additional Features | Lightweight, Microphone Included, Noise Isolation, Tangle Free Cord |
| Age Range Description | Adult |
| Audio Driver Type | Dynamic Driver |
| Best Sellers Rank | #10,999 in Electronics ( See Top 100 in Electronics ) #788 in Earbud & In-Ear Headphones |
| Brand | Sennheiser |
| Brand Name | Sennheiser |
| Built-In Media | CX 100 Earphones, 4 Ear adapter Sizes (XS/S/M/L) |
| Cable Features | Retractable |
| Color | Red |
| Compatible Devices | Cellphones, Tablets, Laptops, Desktops |
| Connectivity Technology | Wired |
| Control Method | Remote, Touch |
| Control Type | remote |
| Customer Package Type | Standard Packaging |
| Customer Reviews | 4.2 out of 5 stars 6,921 Reviews |
| Ear Placement | In Ear |
| Earpiece Shape | Rounded tip |
| Enclosure Material | Silicone |
| Form Factor | In Ear |
| Frequency Range | 17 Hz to 21,000 Hz |
| Global Trade Identification Number | 00615104327825 |
| Headphone Folding Features | In Ear |
| Headphone Jack | 3.5 mm Jack |
| Headphones Ear Placement | In Ear |
| Impedance | 18 Ohms |
| Is Autographed | No |
| Item Type Name | Headphone |
| Item Weight | 0.38 Ounces |
| Manufacturer | Sennheiser |
| Model Name | CX 300S Red |
| Model Number | CX 300S Red |
| Noise Control | Sound Isolation |
| Number of Items | 1 |
| Specific Uses For Product | Personal |
| Style Name | In earphone |
| UPC | 615104327825 |
| Unit Count | 1.0 Count |
| Warranty Description | 2 year manufacturer |
| Water Resistance Level | Not Water Resistant |
M**L
Best earbuds I've ever owned...so far.
After a bad outing with the Sennheiser CX 100 (they lasted 10 days before the left earbud died), I decided to try the CX 300S due to its perceived improved build quality. I've had them since April 20th, and so far, so good. The cable is thicker and the 1/8th inch plug is reinforced much more sturdily than the CX 100. These earbuds are *extremely* comfortable. You can sleep in them and you don't even notice them in your ears. Sound isolation is very good, much better than CX 100. When working out at the gym, external noise is cancelled. The bass is also much improved over the CX 100. However, I find that the mids are a touch cleaner with better soundstage on the CX 100. But overall, the CX 300S provides a more exciting listening experience, especially if you're a basshead. I'm really hoping these last. Best earbuds I've ever owned. Worth the price and the sound quality is just on another level entirely compared to the earbuds you get with phones. UPDATE: Best headphones I've yet owned. A few months in, no issues, even after being run over by a car. It doesn't feel like you're wearing them, noise cancelling is acceptable, sound quality fantastic. Only issue is the inline mic is weak at recording field sounds (it's okay for calls) and the jack comes out easy, which I'm assuming was designed this way to prolong the life of the connection at the jack point. I LOVE these. I would buy another in a second. And Sennheiser has a fan for life.
L**P
Sounds good. Metal casing. Seems sturdy
They sound good but are very uncomfortable for sleeping. I use ear buds to sleep to drown out the annoying snoring coming from my husband's side of the bed. I thought I would try out these Senheiser CX 300S ear buds because they were not too much more than the JBL T290 ear buds I was replacing (for the third time in 4 months making them much cheaper if they actually lasted). I paid $16.99 for each pair of the JBL's and the Senheisers were like $35 so it seemed like a good choice. They do seem durable with a metal casing (which is probably why they are uncomfortable for sleeping). They do sound a little richer than the JBL's which would have made them so much better for sleeping. I am keeping them to wear for streaming or to listen to music during the day.
G**O
This is mainly about silicon tips
So, I'm not fond of writing negative reviews, and I really am fond of some of the things regarding these headphones, but.. Here we are. Some positives: 1. It looks very nice, I like the color and style 2. The medium size silicon buds are relatively comfortable.. After some initial adjusting, they're really good tips! (I will call them tips from this point on) Negatives, and why I'm writing this review: 1. The sound quality is.. Off. Specifically, I think there's something off about the bass. 2. While it's comfortable to wear, it was actually kind of painful to put in my ears at first. The tips were a little stiffer for some reason. They do soften up after time though, and then they're great. 3. The silicon tips... Fall off sometimes. I've don't know how, but I've rarely had this issue with other headphones. It's happened several times, and I eventually lost one of my medium tips (right ear). 4. The replacement silicon tips are.. Okay. The small one is the size I chose after the medium, and they look any form of noise cancellation, which means that it's harder to block out sounds if you're in any public space (say, a coffee shop). One of the small tips also fell off (left ear) after a few days of use. 5. I've looked around for replacements for these tips for some time, and Sennheiser only seems to want you to buy different tips from a company called Complyfoam, which... Is expensive. I just wish I could get a replacement for the ones that came with these headphones. Overall, the headphones aren't bad (though not worth the $50 price point, I'd say they're valid at $20). If you get these, just keep an eye on the silicon tips!
T**I
Easily my FAVORITE wired earbuds - just purchased round 2!
These are the BEST wired earbuds under $100 I have EVER used. These have been my road warrior with me on many business trips already. I have a nontraditional Android phone that still has a 3.5mm Jack, and I prefer that over opening up Bluetooth at airports any day. It's always reliable since you don't need to charge anything, the sound is intense, full of bass, and maintains three quality even when it is set to a loud volume. The rest cusions are easy to swap, but hold in extremely well. I LOVE(D) these earbuds... however, I just got back from a trip to Alexandria outside of Washington DC and my pair was stolen from me. I suppose others out there knew how great these were and jumped on the chance to steal them. In any case, there was ZERO hesitation purchasingb replacement earbuds. If you're like me, and have to have complete control of your components, preferring wired headsets, I would HIGHLY recommend these earbuds!
M**E
Blah sound
For me, the sound is disappointing. Not a very full or rich sound
H**O
Gran producto
Excelente
T**N
Terrible sound
Terrible sound quality. I may have gotten a defective set, but the sound quality is abysmal on these things. It sounds like there's a high pass filter built in.
D**Y
Revisited after customer service - NO ACTUAL HEADPHONES OR BAG INSIDE BOX OF SEALED PACKAGE!!!
I have loved and supported sennheiser headphones for a long time. From the studio headphones I used for years recording to the original $100 everyday earbuds sennheiser was the company that finally made bose say uncle!. I Haven't had a pair in 2 or 3 years I had a son who is now 3 so I haven't had a ton of free time. It goes without saying I was VERY! EXCITED!!! :-) to receive and open this package. I knew I was headed to a long hard day of work that morning when I went to grab the package shortly after the notification. I happily stashed the package for a nice little me time unboxing later on. WORST UNBOXING SURPRISE EVER, NO EARPHONES no pouch just extra buds and the instructions. My package was picked up by me minutes after my notification sealed and showed no sign of tampering. Leading me to believe they may have been removed somewhere in the actual Amazom chain. I'm a prime member im pretty sure Amazon will resolve with a replacement if not reimbursement. Maybe then that feeling of putting in good headphones and forgetting everything else will be achieved All is well as expected Amazon quickly got a package sent out asap with a box actuality containing product. As I expected they sounded great for the price. Seem to be the closest under $150 sennheiser earbuds with a sound quality review over 4 stars since the sale of the company which saw a huge change in marketing and quality. I wanted to spend a bit more, I wanted the old senny bang for your buck buds. I learned that as far as reputable reviewers said i had to buy a second fiddle obscure release $50 pair on sale for $30. Sennheiser the review gods of old haven't been cracking the 4 level in years. I found the pair to compete with your bose or Sony mid level 4+ sound review this was where I landed with these. New logo and odd shaped but fit the ear canal like a dream and sound great for it. Who knew
C**N
Excellent product
Very comfortable, great sound clarity, would recommend.
D**A
Nitidez
Tengo poco con ellos y no han pasado por la prueba del tiempo, entonces no puedo hablar de esa parte. En cuanto a audio, suenan muy claro, reproducen todos los sonidos con nitidez, le falta un poco de cuerpo/punch al bajo pero siguen reproduciendo correctamente esos sonidos. Se compartan bien en diferentes géneros, a diferencia de otros audífonos que priorizan bajos sobre otros elementos y terminan por ser "especializados" para música electrónica básica, descuidando la experiencia de escuchar otro tipo de música. En cuanto a relación calidad-precio, los compré por la marca, no tengo suficientes comparativas con audífonos de la misma gama para hablar de este factor, pero están bonitos y tienen mejor feel que otros más baratos. Los recomiendo aunque podría haber mejores opciones, sólo que no las conozco.
I**R
Good releiable and quality product
3.5mm jack wired headphones with Mic for mobile phones is more and more disappearing from the face of the globe and personally I do not like this idea at all, including that I do not want to even buy any mobile phone without 3.5mm jack option. Sennheiser CX300S are not very expensive headphones but there are still a quality headphones from this firm, and I buy there headphone products for two decades already, like this one Sennheiser CX300S mainstream headphones, to those Sennheiser headphones of much higher quality and much more expensive. I even bought this same Sennheiser CX300S headphone model one time in my life already, and I did not make mistake, because it is a good product. Yes, you cannot expect the "Start Trek" sound from them and for High Fidelity listeners, but they are not created for them in the first place, and for the others this headphones will be just fine, especially in this price ratio. All in all, I recommend them. Thank you.
O**E
Bester bis jetzt
Bester Kopfhörer den ich jemals hatte als kabelgebunden. Ist eben Sennheiser
L**X
Son de très bonne qualité
J’ai acheté ses ecouteurs filaires comme cadeau de noel. C’etait un cadeau pour un amateur de bonne musique alors il lui fallait quelque chose en version filaires et qui ne crache pas quelque chose d’inaudible. Après test une fois déballés, j’ai trouvé le son super, et le destinataire du cadeau très ravi aussi. Ils sont de très bonne qualité et pour ceux qui tiennent vraiment à avoir du filaire, je ne peux que vous les recommander.
Trustpilot
2 months ago
2 days ago