This is science fiction: it -évidemment helmet big enough! the contrast with my tiny MP3 player is comical - produces a sound of incredible quality. The musicality, smoothness (but with dynamics!), Finesse, details, image, terrain, layering the sound plans are impressive. I lent my husband swears by his "tube amp" and speakers (very) high-end ... and I have noted that he was shaken in his convictions! besides, I have a hard time recovering. As usual, almost instant delivery Amazon and packaging design worthy of a product of "haute couture" or luxury perfume ...