Released in 2021, Questyle M12 is a mobile headphone amplifier with DAC, which carries on the gene of the flagship Headphone AMP/DAC CMA Twelve featuring high-performance audio signal processing. Questyle M12 has broken through limitations of technology, cost and size of the audio circuit integrated into mobile phones. With the built-it n independent SiP Current Mode Amplifier module and the ESS flagship USB DAC chip, as well as features of MQA decoding and headphone impedance detection, Questyle M12 will always be able to capture the details buried deep in the soundtrack, whether it is the deepest bass sound of the organ in European cathedrals or the strongest bass and guitar melodies in hard rock.