Product Description

High quality stereo in-ear headphone with powerful bass for listeners "on the move". Ideal for use with MP3, CD, MD, DVD and others.

Product Details

• Color: Silver
• Brand: Sennheiser
• Model: CX 300S
• Dimensions: 10.00" h x 2.00" w x 9.00" l, 1.00 pounds

Features

• In-ear, sound-isolating design ideal for use with all MP3, CD, DVD, MD players and portable game systems with 3.5mm headphone sockets
• Includes three different sized ear adapters to ensure a perfect fit
• Offers powerful, bass-driven stereo performance
• Features 21-inch asymmetrical cable and 3.5mm L-shaped plug
• Stylish silver finish design; comes with two-year manufacturer's warranty

Amazon.com Product Description
The Sennheiser CX300-S 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-S will go wherever you take them. Designed in a stylish silver 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-S.

Customer Reviews

Not so good for walking/jogging
I bought the CX 300S earbuds to use with my portable MP3 player while walking/jogging. The rubberized cord tends to stick/cling to your clothing which results in the buds getting yanked out of your ears as your clothing moves around (not to mention the fact that the cord is a little too short.) The buds must be fully inserted into your ear canal in order to hear the full fidelity of the music. With the buds fully inserted, most of the outside sounds are silenced... but this has the effect of amplifying inside (in-body) sounds such as breathing, teeth chattering, swallowing, etc... as well as the sound that the cord makes as it rubs around. Also, as the air moves past your head (while walking) you'll notice very pronounced wind noise! I also noticed that once you get the buds properly fitted, then you smile at someone, the buds tend to pop out! No more smiling!

Now, let me say that if I'm sitting at my desk with the buds properly fitted, the sound is amazing. Very good fidelity with bright highs and nice bass. But, to fully enjoy your music, you'll need to sit perfectly still and breathe gently (and don't touch the cord!)

If you're skeptical about the amplified internal body sounds, try this experiment: take your index fingers and gently press them into your ear canals... not all the way in as to fully plug your ears, but gently about 2/3's of the way in. This is about where the buds will sit when inserted. Now, gently tap your teeth, or take a deep breath. Take your thumbs and rub your index fingers... you get the idea.

I know that this is not a defect with the Sennheisers... this is an inherit problem with anything that you'd stick into your ear canal. And I've now learned that I absolutely hate in-canal phones... very, uncomfortable and inconvenient (and I've recently learned that in-ear phones can cause hearing loss.)

I am switching back to my Koss KSC75 Portable Stereophone Headphones which sound amazing. And they're so comfortable that you might forget that you're wearing them.

Bottom line: If you're a fan of in-ear buds, then I recommend the CX 300S's... they do sound very good when properly worn. Since most of my gripes are with in-ear buds in general, I cannot fault Sennheiser nor the CS 300S's. I rate them only 4 stars because the rubberized cord is annoying and it's a bit too short.

Wow, just as good as Super.fi 5 Pro!
I love the Super.fi 5 Pro. I've owned two pairs in the last few months, returned one because of irritation with UE. When I saw the new Senns were available I decided to A/B the two.

Well, for $150 less these guys are amazing! I have to push the volume up just a bit, but the tips are are comfy, the earpiece itself is discreet and easily maneuvered, and the sound is excellent - not too bassy like the cheap Sony IEMs. There's a soundstage! These are worth at least twice the price. My Super.fi's are going back to Headroom.

Test tracks:

1. "Naked Mole Rap" by Ron Stoppable and Rufus
2. "Le Jazz Hot" from Victor/Victoria
3. "Sentimentale" by Claude Bolling.

All three genres were marvelous. I can feel the piano keys tinkling. Buy these.

Good sound sitting still. Lots of noise from the wires when moving around.
I bought these for the gym, and for that purpose they provide good enough sound, since there is a fair amount of background noise anyways. Of course, they are vastly superior to the crappy Ipod earbuds... In my opinion, these are not audiophile headphones - good but not great. I would recommend these with reservations: I notice a fair amount of noise whenever I move around and the wires bump into my body, or themselves (even brushing against the wire ends up like a scraping sound when it's magnified by the earbud). My main warning is the noise I get from any breeze. Walking at even a moderate pace, I hear a fairly loud "wind noise" from the wires that is magnified into the earbuds. So here is my dilemma - these phones only sound good when you are not moving, but if you are sitting still for serious listening they just don't sparkle. Bottom line: I'll stick with these for now, but I wouldn't buy these again.