Intro Questyle is a well-known manufacturer for producing premium audio devices, including DAPs, headphone amplifiers, and wireless audio systems. For the past years, QP1R gained some significant attention among audio communities for its performance and served as the main product that represents Questyle. My first experience with Questyle happened several years ago, when I got a chance to have a quick to the QP1R. The listening session was short, though I was impressed with its sound and been keeping my interest on their products since then. Then...