Oppo HA-2SE is widely recognized as one of the best portable headphone amplifiers & DACs at the sub $500 range. If you are planning to buy a high impedance open back headphone, then you definitely need a decent headphone amplifier & DAC to drive it properly. Oppo HA-2SE is a worthy investment if you are serious about listening experience.
HA-2SE enhances music playback from mobile phones and portable music players in general. You will be able to hear the difference once you plug it in. Oppo HA-2SE features hybrid class AB amplification and a USB DAC that supports 384 kHz PCM and DSD256, the HA-2SE offers high performance digital-to-analogue conversion for mobile devices such as iPhone, iPad, Android phones, and a wide range of PC and Mac computers.
It is pretty thin and light, making it highly portable. A full charge of its built-in rechargeable battery takes 30 minutes. You get up to 13 hours of playtime for analog sources (via 3.5 mm audio cable) and seven for digital (via USB). It also serve as a power bank, allowing you to charge your other mobile devices on the go.
HA-2SE is a well made product. The casing is made from genuine leather and aluminum, giving it a beautiful high-end feel. HA-2SE is a remarkable product and a great value, and we highly recommend it.