Ive tried them with a headphone amp and an IFI HipDac and got more volume but no change to the sound that would make it worthwhile. Apenas llevo un mes con él y y lo puse a cargar y no sirve . A great game if you are a fan of horror movies - you have no weapons, you just have to be stealthy and avoid the scary Ring-type lady et al. For that reason, I returned them. The belt material is too thin and flimsy. I had some trouble getting used to using the buttons to change between bluetooth and MP3 modes and the MP3 functions. of wear from them. Visto il prezzo che mi sono costati ne vale proprio la pena quindi consigliatissimo👌Buona giornataRoby 5 or 9 in most shoes. So yeah, nice lock.