Finally powerful bass and clear, the rest of the sound spectrum is impeccable.
Its price, in terms of its quality of restitution remains incredible compared to those helmets like "High Fidelity" ... which I also use for other purposes, of course.
Only drawback in my case I do not support them in place long ... too small ears? !!!
I forgot too the fuss to put protective foam ... (whatever the manufacturer, there is something that escapes me at their establishment, and I did not find any explanation the net.