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Sennheiser CX300-B In-Ear Stereo Headphone (Discontinued by Manufacturer)

3.9 out of 5 stars 1,389 customer reviews

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Standard Packaging
  • Soft Silicone-Rubber Ear adapters in three different sizes
  • Product Dimensions: 0.4 x 0.4 x 0.4 inches
  • Powerful, bass-driven stereo sound
  • Small and lightweight, Limited warranty - 2 years
  • Frequency response of 18 Hz- 21 kHz
4 used from $29.50

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Technical Details

Product Packaging: Standard Packaging
  • lightweight

Product Description

Product Packaging: Standard Packaging

Product Description

High-Quality Stereo Ear-Canal Headphones Powerful Bass-Driven Stereo Sound Compatible With Any Portable Device Includes 3 Sizes Of Ear Adapters Black 2-Year Warranty Water Resistant

From the Manufacturer

The Sennheiser CX300 provides accurate tones for tunes throughout the dynamic frequency range. With a 112dB Sound Pressure Level, you can lock out background noise and revel in the pleasure of listening to your music. And Sennheiser has been and is on the forefront of delivering great sound from audio systems great and small. Elevate your listening to transcendental pleasure with the Sennheiser CX300 earphones. Sennheiser is the acknowledged world leader in headphone-transducer technology. These CX 300 headphones are Sennheiser's leading introduction to in-ear-canal earphones. The CX 300 model is ideal for use with portable MP3, CD, MD, DVD players and many other portable devices with 3.5mm headphone sockets. Soft Silicone-Rubber Ear adapters in three different sizes are included to ensure a perfect fit, high wearing comfort and an excellent attenuation of ambient noise. Get away from the daily noise and surround yourself with private audio. The CX300 is the best partner for your player, your ears, and you. Dynamic Transducer Carrying Pouch Sennheiser Color - Black

Product Information

Product Packaging:Standard Packaging
Product Dimensions 132 x 434 x 4.8 inches
Item Weight 1.1 pounds
Shipping Weight 3.2 ounces
Manufacturer Sennheiser
Item model number CX300-B
Customer Reviews
3.9 out of 5 stars 1,389 customer reviews

3.9 out of 5 stars
Best Sellers Rank #3,026 in Electronics > Headphones > Earbud Headphones
#25,521 in Electronics > Portable Audio & Video > MP3 & MP4 Players & Accessories > MP3 & MP4 Player Accessories
#27,625 in Electronics > Home Audio & Theater
Date first available at October 2, 2001

Warranty & Support

Product Warranty: For warranty information about this product, please click here


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Customer Reviews

Top Customer Reviews

Package Type: Standard Packaging
I got these for xmas about a month ago. I've since used them about 5 times. This is my third pair of sennheisers, I also own the mx500 earbuds and the px100 headphones. Sennheiser has always had a great sound, and this set is no exception, wonderful for the price range, and the isolation of outside noise is great too.

Thats where the good ends however. These things have the thinnest wires imaginable. Thats no exaggeration. Im amazed you get decent sound quality through them. Must be 40 guage wire. With that said I treated them with the utmost care. Never pulling on the wires, always using a firm but careful grip on the connector piece when removing them from my mp3 player, yet somehow after 5 uses they are already ruined. The sound crackles and fades in and out any time you touch the connector or the wire moves. Are you kidding me? I read other reviews complaining about this and thought "these guys just don't treat their equipment well." Well i'm here to say i won't ever purchase any more sennheiser without seeing the stuff in person. My Earbuds and headphones have a cheap build quality as well, but after a year of daily use they still work. These push the limit and unless you plan on plugging them in 1 time and never moving, i can't reccomend them. If you go to the gym, walk to class, jog, etc, you will set yourself up for frustration of a broken set in no time.
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Package Type: Standard Packaging Verified Purchase
The Sennheiser CX300-B Earbuds are far from perfect but given the low cost might offer one of the better values in earbuds out there. I needed an extra for myself, and I have been testing a bunch of buds recently. In the end, I decided on these despite their weaknesses because given the low selling cost of less than 50% of list price I thought they were good enough to have as my extra pair.

Now the first thing that people do need to be aware of is that these are asymmetrical, which means one side is longer than the other. This is designed so that the cord can go behind your head. That leads to less pulling on the buds, which leads to less cord noise. All budget earbuds have some level of cord noise, but by wrapping the cord around your ear and behind your head you can minimize it pretty well with these.

The second factor is that the fit of the tips will be very important for comfort. These tips are not the highest quality out there, but they will do. Those with smaller ear canals should be able to get by with the smallest included size. But if those are still not small enough for you you probably will have to step up to the Etymotic Research ER6i Isolator In-Ear Earphones which also have even smaller ear plugs sold seperately. In that case you are talking about 5 times the price, so that's only for those who really have a hard time getting a good fit or are looking for much higher quality.

I burned these in over a few days and overall I am happy with the sound.
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Package Type: Standard Packaging Verified Purchase
I bought these in ear headphones for my sons birthday, for he informed me that they were supposed to be rated # 1 in the world, or something to that effect. They not only come with several ear cushions so you can custom fit them to your own ear, but if my sons opinion is worth anything, according to him they are absolutely super. On a monetary level, I remain confused as to what the difference is between the CX-300B, and this model CX-300, both currently available on Amazon. Money wise they were just a dollar apart at the time of the writing, (the 300B being the cheaper). With the exception of the price, they appear to be the same model in the picture. I decided to spring for the extra buck and get this model, simply because he had told me to make sure to get the CX-300. I really don't know if there is any difference in them or not, beyond the extra $1.00. Since the 300B currently has over a 1000 reviews, mostly overwhelmingly positive, as oppose to my single one for this model as of this writing, I would swing my vote to the 300B no matter what your own son, or daughter tells you. Just my opinion mind you, but I don't see any difference between them. In any event, they are excellent, comfortable headphones and worth the money for either model...

Update: As is mentioned in the comments section of this review, I do believe that the B in the description stands for simply "black", which means I essentially paid a little more for headphones that appear to be black in any event. Despite that, I still recommend these headphones. I have listened with them myself and they are very loud and clear, and have excellent fidelity...
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Package Type: Standard Packaging
My wife got me a pair of these earbuds for Christmas last year and I have to say that I loved them. The sound quality is amazing, they're very comfortable, and they block a lot of noise. The noise blocking, like I said, was very impressive. With my stock earbuds, I was often running my mp3 player at 18-25 volume, depending upon outside noise. With these, I was generally running at 5-8. I'm sure that was better for my ears.

So what's with the two star rating? Well, In about 6 months, I went through 4 pairs of these earbuds. They'd work great for about a month and then one of the earbuds would stop producing much sound. I'd have to turn the volume up from 5 to 25 to get anything out of that one earbud and, if I did that, the other one would be so loud that I couldn't use them. They were under manufacturer warranty, so I'd send them back and get a new pair and they'd work great, for about a month. I did this a few times and, like I said, I went through 4 pairs in a span of 6 months. Even though they were still under warranty, I finally got fed up with the process and just tossed 'em out.

So, like I said, they were great for a little while. Unfortunately, I didn't have much luck in terms of reliability.
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