Why buy expensive headphones. Used this for 4 years now and honestly I get by very well with Apples headphones. I personally cant believe ok satisfied after buying both SHURE or Bose ... And I still love them both. This is just that good. Cant believe the bass and clarity I can get from mediocre headphones for less than $4. I played this app at the Bose outlets and the Bose rep couldnt believe it .. Whats that app called ... Apple reps are the same way. Bottom line is, whatever hear you can afford, this app will take it to a whole new level. Enjoy.