the headphones sound pretty crappy. The sound is boomy and muddled
584960
Solid headphones. I don't think I'll tell you anything comparison reviews you've already read wouldn't -- active noise reduction is passable, but pales in comparison to Bose, but you're saving a couple hundred dollars.

I docked the score by a star for two reasons:
1) when the noise cancellation isn't on, the headphones sound pretty crappy. The sound is boomy and muddled, but once the cancellation is turned on the sound comes to life and is great.
2) the audio cables the headphones ship with are incredibly susceptible to electrical interference when the noise reduction is on, leading to intermittent crackling and static in the sound. This problem is remedied by turning the noise cancellation off, but see point number 1 :)
3213609
The sound is  not good . It sound like a cheap sound system. Would never recommend  it to anyone.
314043
The sound is terrible.  Don't waste your money.
3038156
I might as well tape two transistor am radios to my ears.  There is no bass whatsoever. The pairing is easy, but who cares if the headphones sound so bad you want to throw them out within the first 3 minutes of using them ?  I'm going back to the earbuds that came with my iPhone.  I'm not going to use them long enough to go through one battery charge.  What a waste of $25

Edit:  Cambond customer support is fantastic.  they saw my original review, and after developving a new version of these headphones, they sent me the new version. The sound is better than the originals and will defiitely get some use while I mow the grass this summer.
3927701
They sound like trash can lids with speaker coils glued to them. Too much bass when noise cancelling is off, no bass and anemic sound when noise cancelling is turned on, and all around treble response sounds buzzy, like a bad MP3 file with bitrate aliasing. The problem is not Bluetooth related, because it happens when using line-in connection as well. A co-worker also bought these, and I compared mine to his, had the same sound quality. These are OK for knock-around use, phone calls, audiobooks, casual video watching, or work use but they don't come close to being music-worthy.
4349189
I probably shouldn't complain too much given the price of these headphones but they are the worst sounding things I've ever owned. I use them at work and as such I literally have them on the lowest volume setting possible but they still distort constantly. I'm just super let down with the terrible sound quality, on the plus side due to using them at such a low volume the battery life is much better than advertised. The box said they were rated for 4 hours of battery life (the description said much more than that or I wouldn't have bought them) but I'm actually consistently getting around 7 hours of horrible sounding music
2577457
The quality of the sound was awful and it wasn't very loud.
3319461
The sound quality is poor. It need to be cleaned up digitally.
1448945
Alright value for the cost, but absolutely terrible sound quality
530862
The sound quality is pretty bad and its not very loud. You get what you pay for, that is for sure.
3229806
These headphones are crap! They are hard to set-up and and to load music onto. Now it won't turn on.
1216660
The quality of the sound is normal nothing special, and it is really heavy which hurts your ears and head
4705393
If you put a metal bucket on your head and then got a toddler to beat on it with a wooden spoon, it would still sound a lot better than these God awful headphones. Also, they are flimsy and the plug connector started to short out right out of the box. If you're looking for something inexpensive, reliable with decent sound, try something by Monoprice. I've always had good luck.
1729803
I got this sub because I read the reviews and watch videos of them on YouTube and when I got them and hooked them up they sound like some crap
4257454
They look nice, but the sound is no good. They have too much artificially added bass and it does not sound natural at all. Also, be aware that they don't have a mic.
3933605
The sound is very unnatural compared to my AKG K-55 headphones. Bass is fairly good but the mid-range and highs are severely lacking.
4129114
The sound is kind of muddy.  It's your typical cheap bass-boost EQ that loses all the detail in the mid-high range. The bass isn't particularly impressive either.

I bought these to use at work and they were a bust because the 3.5mm jack has an unusual short/right-angle design that won't work with 1/4 inch adapters.  So buyer beware.