The CX500 are high-quality, noise-isolating ear-canal-headphones with superior, bass-driven stereo sound. It features a volume control integrated in the cable and comes with a new, unique type of ear adapter for an improved fit and even better passive noise attenuation. This design provides outstanding wearing comfort for on-the-go users.
“Sound great, can't expect more from an in-ear headphone... but they're so badly constructed that mine's broke after 2 months. Cheap plastic everywhere and a connector that broke after 1 week. This headphones are a scam. Bought them to replace my old MX500 that lasted for 5 years, unfortunately Sennheiser is not what it used to be. ” --jagalan
“ Like many other people, I got my cx300's as they were widely available on the high street with not much competition at the time. They are mostly known for their bass which is very abundant. The problem with that much emphasis on bass is the rest of the range suffers. Treble, in particular, suffers quite badly and is drowned out. Add to this very little clarity in the bass which doesn't have...” --Marcus_C
“PROS - great sounding headphone - great in-ear fit - good quality cable - unobtrusive design CONS - slightly heavy bass for me NOTES Equal length cable for each ear (not for wearing behind the neck) ” --gingerbeardman
“ This past summer I was looking to upgrade from my mediocre Sony behind-the-neck on ear headphones. I wanted to stick with open design and behind the neck, and these seemed to fit the bill nicely. Before going into any detail whatsoever about the sound quality or pros or small cons, I'll say this: my pair broke. Not so that they're unlistenable, but I had to fix them up. The...” --NoahZ
“I bought these on ebay.co.uk for £10.99 which is about $18 US or €13. They are a discontinued product, hence the low price, and bought from a retailer called "uk**seller". These are genuine Sennheiser products in sealed retail package, nicely made of good materials and fully up to the usual Sennheiser standards of presentation. goldenears.net has tested the CX 280 (same IEM but with inline...” --julian67
“I am going to keep this short. SOURCE: Cowon C2 320 Kbps Mp3 and Flac files. GOOD: - Fits my ear properly. I am sure, whatever i do, they won't fall off. - Isolation, is good. BAD: - I feel that based on the shape of ear canals this could turn out to be a nightmare for a few people to wear. - Just a flimsy pouch and three tips -...” --wrathzombie
“ I first purchased these because I wanted something good to use. Everyday travelling to and from school/work would take me about 3 hours (round trip); so having good quality IEMs that isolated me from the noisy bus and other distractions was something I wanted to have. I saw these in-store and thought I might as well try them. I've heard of Sennheiser before but was the quality as good as its...” --Luchico638
“IN MY OPINION!! The bass on these completely blew me away. Pounding. Hard hitting without loosing much detail. By far the greatest aspect of these buds. The mids are not as forward as i would like. I find myself wanting more crunchy distortion from guitars on metal tracks. But the mids do handle vocals well. The higs sound good to me. Overall very satisfied. ” --ThickT
The CX 310 originals feature iconic Adidas style and incredible stereo performance.