The sound is clear, the bass pretty good, treble it passes, the bass is average but overall I'm pretty mixed.
For me the son headsets, headphones are still far too long, Intra headset does not include a dial to control the sound which is very annoying because you have to constantly have the Mp3 player on hand ...
And finally I would say the Intra system means the insulation is perfect (too well), overall the headphones do not move, so there is no need to put them up regularly.
The storage pocket friendly too.
In conclusion on the whole it is a good product especially for those who love the bass, the big regret is the lack of wheel to control at least the volume. If you have a larger budget try other models of the brand or you redirect to the standard headsets or helmets ...