Have to agree with James.  Plenty of controlled bottom end but to the extent that you don't get as much detail in the  higher frequency's. I seriously thought I had been sold Chinese sweat shop rip-offs. Wish i had have put an extra £20 to ultimate ears or the like.

Yes, you get a lot of bass with these, but they really lack on treble and almost hiss at times. Also, the non-tangle cable isn't. It takes for ever to sort them out after they've been stowed away. I previously had some Ultimate Ears fi 4vi which were far better in every way.