Engin exceptional audio performance. Especially because of the many possible settings that still allow to obtain the best sound reproduction, virtually anything with the output. I'm not talking about the use of a helmet, for it is not difficult to have a good result, provided that it spends at least 100 euros to purchase. But regardless of HP equipment in a car, one is always faced with acoustics soapbox. The parametric equalizer, BBE functions Cowon i9 change the situation, provided that we take a little time to tweak the settings.