If you'd rather leverage that Tidal subscription from an iPhone or Moto X, you can still use the player as a headphone amp, but when paired with a mobile handset, Onkyo's gear fills the role of DAC with the help of a companion app. When you're stationary, the same USB jack that connects with your smartphone of choice can also be used to handle any desktop headphone amplifier duties. If you're like me, you have a favorite set of cans you're too fond of to take out in the elements, so this is a nice touch. And one that helps soften the hit to the ol' wallet... a bit. Speaking of the price tag, the device will ship at the end of April for £499 (around $740). Of course, you'll need to be willing to fill not one, but two pockets with audio tech for your evening walk.