We tested 10 top -
rated headphone amp plus USB DAC combo units with a blind - listening panel using three different headphones, five laptops, an iPhone, and an iPad, following that up with lab measurements of the panelists» favorites.
Though the
Amps Air are sweat resistant, they lack an official IP
rating and provide an ill - fit, knocking them out as one of the best Bluetooth
headphones for running.