Hey there, I have this wonderful headphone amplifier I'm looking to sell. This is the Cayin iHA-6 headphone amplifier, which is designed to work the best with inefficient planars, but will also work perfectly well with most headphones you have. I used it with the 300-ohm Sennheisers, the HE-6, TH900 and it left me satisfied with a great tonal balance across all frequencies, plus having a high current and low current feature which made driving insanely hard to drive stuff like the HE-6 a very happy experience. Has insane power for any headphone you throw at it, and is built like a tank. Looking to get $535 shipped and Paypal fees included for it, will come in its original packaging. Thanks for looking!