Obviously, this helmet does not replace a good HIFI, but troubleshooting (problem .. speaker), the sound quality is amazing for a price so moderate helmet! he can listen to music for hours without fatigue. It is lightweight and comfortable. The extension of 6 m has a huge advantage compared to the model 145 SBCHL whose sound is also very good but the cable only 1.2 m! In addition, the adapter 3.5 / 6.3 to connect it directly to the CD player is provided. Finally, the potential volume adjustment (downward, of course) can be a plus. Also convenient to enjoy TV without waking the neighborhood. In short, very good value.