Queungs Audio is a cutting-edge technology-oriented audio product company with a number of world-class patents. The headphone amplifier equipped with Questyle "current mode amplification technology (CMA)" is its core product, and its excellent performance has won the unanimous recognition of evaluation institutions and users at home and abroad. QP1R is the first product to decentralize CMA technology into the portable player, and has won many international honors such as the AVTech Video Award in the UK, the 2016 Rocky Mountain RMAF Best Portable Player, and the 2016 iF Design Award. The QP1R has always been known for its high quality, with a complete soundstage, clear separation, and outstanding expressiveness when playing classical music. Its vocal interpretation orientation is not full and powerful in the traditional sense, but clear and smooth lines. The QP1R is solidly workmanlike, and $7,000 is worth the price for its excellent sound. However, the front dial damping is too smooth, and the occasional frame skipping when the playlist is too long is its fly in the ointment.