Poor sound quality almost like that of a mono combined ...
350299
Poor sound quality almost like that of a mono combined high treble sound. Tried these earphones on different devices with various equalizer settings and no difference.
2261072
Terrible sound quality.  Distortion at medium volume and higher.  I even used an Equalizer but it didn't help.  A fair price for this product would be about $20.  I read so many positive reviews that I thought I would try it but I am very disappointed.  I am thankful for Amazon's easy return policy.
2155570
These were noticeably lower in sound quality to my $25 Panasonic HTX7's. Save up and get a better set.
4600464
I bought these headphones because of the high reviews, so I was surprised to discover the sound quality on these headphones is poor. Also, it's as if it has an EQ downward sloping with higher frequencies being output at very low volumes. Also the cord is very sensitive to transmitting noise sound when touched. Giving two stars instead of one star because the product works.
2409497
A neat idea and I was looking forward to this release. Unfortunately, I find the sound quality far from satisfactory. Obviously these are being taken from unreleased recordings, but why go through with this idea if decent recordings can't be found. I can understand if this were the case with the early recordings, but even the 70s and 80s versions just don't cut it. Very poor sound quality compared with some other archival releases like the Grateful Dead Movie soundtrack.
49766
The sound quality is poor. It pairs instantly with my blackberry 8830 but adds a rattle to the music, much like a busted tweeter. I tried it in my car and in home stereo system, same problem. The device would not work for you if you are looking for pristine sound quality.
4461415
The Bluetooth/wireless features are nice, but the sound quality is beyond awful. I didn't have terribly high expectations, but these sound worse than your average dollar-store over-the-ear headphones. The sound is tinny, metallic, and headache-inducing even before higher volume levels. Tried with multiple phones because I thought something was wrong with mine. If you absolutely crave the wireless features above all else, that bit works well. If you care about sound quality in the slightest, keep on looking.

For contrast, I own a pair of the $15 Amazon-branded earbuds and I think they sound amazing. It's not realistic to expect helmet speakers to sound anywhere near as good as earbuds, but these things were downright unpleasant.
3466152
Ordered these for the convenience of bluetooth to replace a perfectly fine plug in pair. Quite disappointed with the sound quality. They have almost no base and all the low end sounds seem to blur together. I switched back to my plug in pair and they sound much better.
1511412
Not worth a plug dime... terrible sound quality
2152068
returning them, sound quality poor for a $20 pair of speakers, especially w/ the hum.
2286164
Sound quality is not great and av jack for speakers are even worse.
2184004
I tried to like these, but their sound quality is so poor--even with the great price for replacement iPhone headphones.  The product's phone functionality works fine, but they are a failure as headphones.  Maybe I got a bum pair that made it through a quality screen in error.  The highs are hissy, their are non-existant low-mids, and their is a background hiss.  My cheap, off-brand cassette player from 1984 would give Griffin Tunebuds a run for their money in terms of audio quality.

I have had great luck with cheap, neodynium magnet, sound-isolating headphones from J-Labs, Sony, and Skull Candy.  I assumed that I could get a phone headset and decent headphones in one package for $20-$30 in the Griffin Tunebuds, but I basically got a serviceable headset.  I am not going to return them, but you can bet I won't be listening to music with them.  I am listening to them as a write this--wow, so bad!
4276417
While the sound quality of these is great for the price, the build quality is awful. After initially ordering a pair of 6x4s and returning them because one was bad right out the box, I stupidly ordered some 6.5s, again based on reviews and price. Well, one was bad. AGAIN! Straight out the box. Need to work on their quality control at the manufacturer. The many positive reviews are half right; the sound quality is great--if your into mono.
198932
Bad quality sound.  Beware you get what you pay for.
1275883
Very poor sound quality. Not at all compatible and sound quality is so poor that even your mobile phone volume is higher than this speaker. Not recommended. Just a showpiece.
1225687
I was happy to receive my headset and install it. At first I was impressed with the quality of construction and ease of pairing however the sound quality is very poor. The sound is very flat and tinny with very low volume which makes it hard to hear with with noise.
Spend a little extra and get a better sounding product.
1456916
Sound quality is poor compared to the same product i have had for over 5 years now. These speakers are slow to respond, sound tinny, and out of the blue the bass will come alive all on its own. Volume switch has to be cranked to the halfway point just to get a peep out of them. The item description doesn't say it but I suspect that these speakers have been poorly refurbished. And therefore really put a dim light on any other Logitech purchase I will make in the future. Because it seems they are getting to be more of a Wal-Mart made in China brand than the quality product of past purchases. My best advice find a different product, even if you have to spend more, you will be happier elsewhere.