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  • Sennheiser CX 400-B Lightweight In-Ear Stereo Headphone (Discontinued by Manufacturer)
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Sennheiser CX 400-B Lightweight In-Ear Stereo Headphone (Discontinued by Manufacturer)

222 customer reviews

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  • Ideal for use with all MP3, CD, DVD players and portable gaming systems
  • High-performance dynamic speaker systems for powerful, bass-driven stereo sound
  • Superior fit in the ear canal due to enhanced ear adapters in S, M and L sizes
  • Extremely small and lightweight
  • Includes cable clip, extension cable, and carrying pouch for convenient handling and storage

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Technical Details

  • Light Weight/Microphone-Feature/Noise-Cancellation/Noise-Isolation

Product Description

The Sennheiser CX 400-B is a high quality, noise isolating in-ear headphone with powerful, bass-driven stereo sound for listening on the go. They feature a short cable, perfect for use with armband MP3 players or with a remote-control. With the included 3-foot extension cable the CX 400-B can also be used with a player carried in your pocket.


Product Details

  • Product Dimensions: 1.6 x 4 x 8.7 inches ; 4 ounces
  • Shipping Weight: 4 ounces
  • Domestic Shipping: Item can be shipped within U.S.
  • International Shipping: This item is not eligible for international shipping. Learn More
  • ASIN: B000WOIG8C
  • Item model number: CX 400-B
  • Average Customer Review: 3.7 out of 5 stars  See all reviews (222 customer reviews)
  • Amazon Best Sellers Rank:
  • Product Warranty: For warranty information about this product, please click here
  • Date first available at Amazon.com: September 25, 2007

Customer Questions & Answers

Customer Reviews

Most Helpful Customer Reviews

125 of 126 people found the following review helpful By Alex Navarro on February 5, 2009
Package Type: Standard Packaging Verified Purchase
This is a great set of earbuds. They sound terrific and have plenty of bass. I also ordered the V-Moda Bass Freqs because I like to "feel" the music in my head, but after listening to the CX400, I'm not sure how much more bass I really want. They really do have great bass. Keep in mind that you must use the silicon tip (3 sizes included) that makes a tight seal and is comfortable for you. For me, it was the medium ones.

The thing with this style of earbud is that unless you fit them securely into your ear canal, you wont hear ANY bass. But once you situate them correctly, the sound is very high quality. You can hear that really low tight bass that most earphones can't reproduce. The mids and high (voice and treble freq) are nice and clear and totally distortion free. Of course, for audiophiles the sound is less than accurate (thats why only 4.5 stars), but for most listeners the sound from these little $35 buds is superb!

Another thing to consider with this type of earbud is that you will hear pretty much all vibration against the cord. That's just an inherent feature of this type of plug. Rubbing of the cord against anything will cause a wind-like noise in your ear, however, I found that if you clip the wire to your shirt with a little slack it's minimal, and while your music is actually playing the sound is easily ignored in the background.

The only other thing I didnt care too much for was the cord length(s). Without the included extension the cord is about 1.5ft, which is only good for an armband or your shirt pocket. The extension adds 3ft, so the result is 4.5ft of cable dangling if you wear your player in your pocket. I had to coil up some of the wire into a small loop and placed a twisty-tie on it to keep in control.
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41 of 45 people found the following review helpful By Steven Sweeten on December 31, 2008
Package Type: Standard Packaging
about a year ago I bought a pair of bose in ear headphones, but recently they started to stop working, the wire was loose. This was devistating, I paid $99.99 for them, and at the time the sound quality was great, until I found these. The sound quality is sooo much better than bose, and the fit of these in the ear is better than bose, they do NOT fall out, the bass is deep, and all the sounds are clear and crisp. Unlike the bose, these block out alot of background noise, I would STRONGLY reccommend them to anyone who was thinking about buying the bose headphones. (don't pay more than $20 for them, that is the best price for them)
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57 of 65 people found the following review helpful By Jay Namaste on February 11, 2009
Package Type: Standard Packaging Verified Purchase
The sound quality of these headphones is phenomenal. Crystal clear, with a balance between the highs and lows, without neglecting the midrange (most speakers seem to do that). However, I'm a little frustrated with the ergonomics. You have to jam the earbud into your ear canal in order to get the full good sound. This makes it uncomfortable after awhile. They fall out of my ears when I'm exercising too. And finally, the cord is too short - it's not long enough to span my ear down to my pants pocket. The headphones come with an extender but it just adds a hassle and too much wire. I wish the main wire was just 6 inches longer.
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16 of 16 people found the following review helpful By E. Purnell on March 25, 2009
Package Type: Standard Packaging
I purchased these earbuds to replace my Apple oness which were literally falling apart. I have been blown away by the performance with a few caveats.

- If they do not fit properly in your ears, then you cannot enjoy them they way they were intended.

- They block out most of the ambient noise which might be dangerous for commuters on bicycle or on foot in a busy city.

- The cord is just ridiculous. It is entirely too short and with the extension is entirely too long. I cannot for the life of me figure out who's idea that was.

- Every thing that comes in contact with the cord can be heard. When it rubs against your body- or for a big guy like me, my heavy footsteps-you can hear it in the headphones. I wouldn't recommend them for working out.

Pros:
The low end is amazing. If your music has bass, you will hear it. Even those subtle low notes you might have missed before will come alive.

The buds are pretty comfortable for me. I know this is subjective but I have left them in for long periods with no discomfort.

The sounds is great overall. They sound as good as my $150 Sony Studio Monitors I bought years ago

They come with a little carrying case and some item to wrap your cord around when they are not in use which is nice because I am always tangling my cords when I am not listening to music.

If you like great sound, don't necessarily need headphones for the gym or bike riding, like to hear the full compliment of notes in your music, don't want to spent an excess of money, and don't mind finagling with the cord a little to get the length right, then these will be a good purchase for you.
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13 of 13 people found the following review helpful By Just Another Geek on March 5, 2009
Package Type: Standard Packaging Verified Purchase
I recently purchased the CX 400 from Amazon for about $30. In brief, these headphones provide far superior sound versus the stock earbuds one receives with ipods or other mp3 players. To my ears, they sound as good or better than most headphones in the $70 - $100 range.

Pros:

1. Sound quality - exceptional clarity, good solid bass (not too much though) and well balanced tones. When I listen to music through my ipod, I can hear sounds that I didn't hear on my old ipod headphones or even through regular speakers. I tend to listen to a variety of music - but primarily rock and world music. If you're into hip-hop or other bass heavy music, these might not be for you.

2. Fit - for me they just fit well with the medium earplugs. Fit is critical to comfort and the sound quality one perceives. When they create a good seal, they feel light and they block out external noise and one can concentrate on the music being played. I wear them when running and working out in the gym and no issues with them slipping out of my ears. These come with 3 sizes of plugs to help people find the right fit.

3. Accessories - these come with a little pouch and winder. I like the pouch so that when I store the headphones with my ipod in the car, they don't get tangled with other items in the storage compartment.

Cons:

1. Cord Length - The standard cord length is really only useful for armbands. I'm 5' 10" and the cord will really only extend to the armband. When I add the connector, it becomes very long and you get excess cord if you want to keep your ipod in the pockets.

2. Straight Plug - I would have preferred if Sennheiser had provided an angle plug for the headphones (those where the wire comes out at a right angle from the plug).
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