Two of the most prestigious audio brands in the world have joint forces to develop arguably the best mobile headphone amplifier available. Beyer dynamic is a first class name when it comes to headphones and amplifiers. Astell & Kern is also a leader in high end portable audio devices. The A200p is one of the smallest portable high-end DAC headphone amplifiers on the market. Together these two companies have developed an exceptionally compact DAC with an integrated headphone amplifier. This high-end technology meets demanding audio requirements and provides you with significantly improved sound. Previously unheard detail, better contoured and deeper bass, as well as more natural instrument and vocal reproduction transform standard portable sound into a true HD Audio experience. As opposed to ordinary amps, the A200p gets the digital, not analogue, signals from smartphones or other portable devices. Its DAC (Wolfson WM8740 DAC) converts the signals up to 24bit/96kHz (HD audio). The result deserves the name "high end" and is a perfect match even our best headphones.