1 driver and then use your own DAC/amp as a pass-through to drive your massive expensive HD audio headphones and you could probably get the best of both worlds from there. My husband is a large man so he needs them. I does what it says on the tin. They charge pretty good even for the length, and works whichever way you plug it into your phone. Makes me think Im blind and cant read braille. Got mine for $70, and would hesitate to pay $95 without shopping around a bit. Das Logitech Headset hat sehr leicht zu bedienende Tasten, diese werden sogar per akustischen Feedback (kurzes piepen) wiedergegeben. It also makes me sit up straight while sitting, fixing my lazy habit of slouching especially when breastfeeding. The first few days that I tried them they did hurt my ear a little but its because I was not used to them. I bought them to wear with skinny jeans and leggings, but they looked terrible.