Editorial Review:Product Description:sound-isolating earbud design * includes 3 sets of interchangeable earbud sleeves for a comfortable fit * 43' asymmetrical cord with stereo mini plug * frequency response: 18-21,000 Hz *
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Customer Reviews
Average Rating:

Rating: 
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Sit very still
I just bought a pair of CX300's, at least in part as a result of the reviews I read here. I can't fault the sound, both Billy Holiday and Luciano Pavarotti sound like champs on my Cowon D2. Outside noise is efectively canceled, however the cord, which is too short, conducts all air disturbances in a most distressing way. So if you are planning to go running or to the gym with your mp3 player, think about getting some other brand with less sensitivity. I am listening now to the Nat King Cole Trio as I write, I am sitting very quietly and they sound great.
Rating: 
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An Excellent Choice in Earbuds
Having never tried ear-buds before I'd often been suspicious of their sound quality claims, but I'm quite impressed with these little things. The clarity is excellent, the ability to produce bass without sounding muddy is fantastic, and overall I'm really just impressed you can get so much out of something so small. Some folks have mentioned a "tinny" quality as far as the sound output goes, but I've heard none of this myself.
They fit very nicely too. I was concerned about this headphone design making my ears sore, but that's definitely not been the case. They're very light, the inserts allow you to pick the right size for the ear canal, and I must say the cord design is top notch. The instructions for wearing these are on the package, do yourself a favor and briefly look at those first because while I thought the concept was curious, the overall benefit of this design is clear. I have no issues with the buds being pulled out of my ear and the cord being supported seems to take the remaining weight off them as well (not that the cord is heavy).
Rating: 
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Til now....I like it
Just got it. 1st impressions are good...i thought the bass was a little low, but just used a different setting for the ipod equalizer and got it ok. Really small on the ears, beautiful black finish. Worth the money.
Rating: 
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Exceptional sound quality and strong price point
I recently received this item to replace the somewhat lacking ipod stock headphones. The first thing that struck me about this product is the comfort of the "canalbud" design. For me, traditional earbuds because excruciating after any more than an hour or so of continuous use. These buds have an almost foam earbud feel to them, and I've been able to wear them for extended periods of time with no discomfort. The sound response on these is fantastic, with respectable bass without sacrificing the mids and highs as well. Headroom's frequency response graphs show superior sound production compared to all earbuds in this range.
The only drawback I've found so far is the thin cord, which is easily tangled and bent and does not seem to be very sturdy. Time will tell if this becomes a bigger issue later on. Overall, I would highly recommend these to anyone looking for high quality earbuds in a reasonable price range.
Rating: 
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Poor design
I just don't like the extra long wire (15 inches) on one side of the earphones. Due to this design, one ear bud keeps popping out. Can't use these at the gym since the extra weight of one side keeps causing them to come out. I can't comment on the sound since I can't keep them in place long enough to listen. Picture is deceiving since it make one side look only one inch longer when in fact mine is about 15 inches longer on one side. Returning ASAP!!