I received these yesterday and have been playing a ...
Strengths:clean sound, reduces low frequency noise, compact foldable design, nice carrying case.
Weaknesses:cumbersome battery pack, much less mid or high range noise reduction. Some noticeable ear discomfort after long use.
Posted Jun 4, 2005 - I received these yesterday and have been playing around with them only for a day or so. This is the first pair of noise reduction earphones i have purchased. I have read good things about Sennheiser, especially the noise reduction headphones so my expectations were rather high.
First thing out of the box, one notices the compact folding design of the headphones. Very nice. It comes with a carrying case, and two jack adapters. Headphone materials do not feel flimsy.
When i put them on, the headphones adjust to a snug fit with the padded earphones on my ears. After a few hours of use, they tended to cause discomfort due to the constant pressure on the sides. I think this may be due to my not adjusting the headphones properly.
Music played very well through these, I'm no audiophile but to my ears these headphones sounded very good.
With the advanced noiseguard turned on, i immediately noticed a reduction in the low range background noise. Midrange and high range reduction is significantly less. I could hear my (old) refrigerator compressor noise output changed but my computer fan noise only slightly altered.
Three side effects i also noticed with the noise reduction turned on was that there was some sound pressure (feels a bit like when an airline is descending). I read on some other forums that this was likely due to the earphone cancellation output. The second effect is that there was a slight increase in high range noise - like a white noise hiss. Neither of these bothered me but were noticeable. The third is that when playing music, the noise reduction appeared to slightly amplify the music.
In summary, this is a good pair of headphones. The headset appears to deliver on reducing noise with or without any music input. I was a bit disappointed at the mid/high range noise reduction, but look forwards to trying these out on the airplane.
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