Armin van Buuren has been quietly designing his ideal headphones over the past year, and they have just been made available to the public. The A5-Pro's will be premiering at $299 on his website and boast a lightweight feel, leather stitching, and a compact collapsable construction that allows them to curl into a ball and then snap open. While Armin wore the originals, he passed out a few pairs to his friends on the 'A State of Trance' stage at Ultra this weekend.