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Sennheiser CX300-B Earbuds (Black) - Old Version (Discontinued by Manufacturer)

3.9 out of 5 stars 384 customer reviews

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  • Powerful bass-driven stereo sound
  • Perfect fit in the ear canal due to ear adapters in different sizes
  • Excellent attenuation of ambient noise,Extremely small and lightweight
  • Ideal for use with all MP3, CD, DVD, MD players and portable game systems
  • Asymmetrical cable
2 new from $79.99 3 used from $36.99

There is a newer model of this item:

Sennheiser Cx 3.00 In-Ear Canal Headphone Black
$49.95
(3)
In stock on July 29, 2016.

Technical Details

  • lightweight

Product Description

Product Description

The Sennheiser CX300-B Earbuds are the ideal ear buds 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. These ear buds, with their in-ear, sound-isolating design, offer powerful, bass-driven stereo performance. Extremely small and lightweight -- they weigh a bit more than an ounce -- the CX300-B will go wherever you take them. Designed in a stylish black finish, the ear buds include a 3.5mm L-shaped plug and 21-inch asymmetrical cable. Sennheiser, an acknowledged world leader in headphone-transducer technology, offers a two-year manufacturer's warranty on the CX300-B.

Amazon.com

The Sennheiser CX300-B Earbuds are the ideal ear buds 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. These ear buds, with their in-ear, sound-isolating design, offer powerful, bass-driven stereo performance. Extremely small and lightweight -- they weigh a bit more than an ounce -- the CX300-B will go wherever you take them. Designed in a stylish black finish, the ear buds include a 3.5mm L-shaped plug and 21-inch asymmetrical cable. Sennheiser, an acknowledged world leader in headphone-transducer technology, offers a two-year manufacturer's warranty on the CX300-B.

Product Information

Product Dimensions 9 x 2 x 10 inches
Item Weight 8 ounces
Shipping Weight 3.2 ounces
Manufacturer Sennheiser
ASIN B000E1FYQA
Item model number CX 300B
Customer Reviews
3.9 out of 5 stars 384 customer reviews

3.9 out of 5 stars
Date first available at Amazon.com October 2, 2001

Warranty & Support

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

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Customer Questions & Answers

Customer Reviews

Top Customer Reviews

By M. Truong on October 20, 2007
Before I bought CX300, I read a lot of reviews and comparisons with Shure E2C. I was lucky to find two very good deals on both of them so I bought them both. I paid CX300 for $20 including shipping and Shure e2c for $40 with free shipping. I used them for a month now and here is what I find:

They are both much better than average earbuds (ex: apple earbuds)
Bass: CX300 is much stronger than E2C (if you like bass, you'll love CX300)
Clarity: E2C produce more clear and clean sound than CX300, because the bass on CX300 is so strong, it overshadows midrange and highrange sound a little bit.
Comfort: CX300 is much more comfortable to wear than E2C, I can wear CX300 all day and not being sore. With the E2C, it is hard to choose the right earbuds and I have to wear it right (I have to push them deeper into the ear canals) to receive a clear sound and a decent bass.
Cable quality: E2C have the best cable quality, much longer and thicker than CX300. That being said, CX300 cable is not too bad, but it can be a little short for a tall person.

In conclusion: I am happy with both earbuds, I used CX300 for outdoor and at work because it is comfortable to wear, and easy to put away. But I enjoy the E2C in my home when I just want to enjoy the quality of the music.
Sennheiser CX300 is good buy at $20 to $30 price range. And E2C is good at $40 to $50 price range. If you pay more than that, you pay too much.

Last word, if you want to enjoy richer sound of a better earbuds, you should rip your CD a least 260 bit-rate or higher. Believe me, it make a different, you will hear sound you thought it wasn't there.
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CX-300 is one of the latest products in Sennheiser's wide line of headphones. Its raison d'etre is 'ambient noise attenuation' in Sennheiser's words. Of course they are meant to be used with portable devices and do just fine at that.

Exactly how good is the noise attenuation?

Sennheiser says 'excellent', but surely you would want a more unbiased opinion. The noise attenuation is certainly good enough. I have tried them in the Athens Underground Railway (Metro). It is so noisy when the train moves, that with common closed headphones, it is impossible to hear the music at a volume that won't impair your hearing. With the CX-300 a lot of the noise is shut out, so you can enjoy your music at a reasonable volume. Another measure of comparison is that you can't hear a person that is near you speak, unless they shout. That is what these headphones were meant to do.

If you don't want or simply don't need noise reduction, you can buy just as good or even better headphones at a cheaper price. For example Sennheiser's PX and HD series, and AKG's K24 and K26.

Obviously for this price you can't buy high fidelity. The sound quality is up to Sennheiser's standards of course. I am using these with my Sony HD-5 mp3 player and haven't got any complaints. When I am not in the subway I usually go with Sennheiser's PX-200. I haven't made a real head to head comparison, but I think they are more or less a match on sound quality. So obviously, you can get better sound at home with quality speakers or quality bulky headphones.

These headpones don't silence everything.
Read more ›
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Verified Purchase
I bought these when the left earbud on my Sony MDR-EX51LP's stopped working. I was initially upset because I (thought I) liked the Sony's and planned on just getting another pair of them. However, I saw a favorable review of these in PC Magazine and decided to give them a try. I'm really glad I did! The sound is much richer and the bass is much deeper than with the Sony's and it is giving me a better appreciation of the music. Now, I don't miss an opportunity to pull out my ipod to fill the time. These also seem to be louder which allows me to listen to the ipod on a lower volume and get a little extra battery life out of it. On the plane, they also do a better job of supressing the sound of the engines. All around, I'm very pleased. They cost twice as much as my old Sony's, but in my opinion they are well worth it.
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Verified Purchase
I recently listened to music with these for 5 hours straight and got to know them well. These babies are awesome. The highs are bright, the mid-range is excellent and the low-end/bass is very good. I'm amazed they can produce sound of this quality in such a small device. Bose and Klipsch have nothing on these things. And it bares repeating, the bass is VERY GOOD - almost THX quality. Taking further into account the price of these things and we're talking BEST BUY.
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I first purchased a set of the Sony MDR-EX51's, and the cords "melted" a common problem users of those headphones report. I'd seen that the CX300's were announced at CES and got favorable reviews compared to models costing twice as much. With the Sony's melted, I'd been looking at my options, mostly Ultimate ears.

The sound is much better than the Sonys, as other reviewers have reported, the Sonys emphasize bass, and are weak in mids and high frequency. The soundstage opened up quite a bit with the CX300's, vocals are much more pronounced, and real cymbal sounds at the high end.

Negatives:

1. the cord on these is not an even Y shape, it long on the right ear short on the left, to drape across your neck. It's fine with me, but some people don't like that shape.

2. cord noise. Dude, these cords make a racket in the wind or against clothing, tranmitting to you ear a dull thud sound and or rustling sound. You can't move with the cord on clothing or you are going to hear it. Use during exercise would have to be in such a way the cord is not moving (like on a stationary bike they would probably be okay).

3. I couldn't get them to fit and seal quite right with any of the 3 size silicone ear pieces. The Sony's silicone ear tips fit right on the CX300's so I swapped for a slightly larger "medium" size from the Sony's and they sound great (get a good seal) and feel fine.

Huge upgrade over any standard earbud (i.e. Ipod white buds) and probably competitive with much higher-end buds.

I listened with: Iaudio U2 1gb, using Lame encoded 192k CBR mp3's and ogg encoded q4 files.

Using the Sennheiser CX300's, I was able to disable BBE, and MP3 enhancements, that previous I used with the Sony Bud's (to get decent sound). Listening to the CX300's set to flat equalization sounds great.
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