The MDR-1ADAC delivers an absolutely amazing sound. Accommodate the AD converters and amplifiers directly in the headphones means that you can enjoy decent sound even with a mobile phone. Works for me fine with Xperia Z3, iPhone 5s and PC. The sound is very detailed, the bass is strong but not overstated and I'll be on a single charge on Handle multiple days (1-2 hours per day). I'm excited.