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Questyle M12 Portable DAC/Amp final sale Siri or Hey Google isM12 Mobile Hi Fi Headphone Amplifier with DAC M12 Start Your Mobile Hi Fi Journey To greet mobile lossless music in the 5G era, Questyle released the M12 in 2021, a mobile Hi Fi headphone amplifier with DAC, which integrates Questyles core technology and carries on the gene of mobile Hi Fi feature. M12 allows all mobile phone users to break through limitations of technology, cost and size of the audio circuit integrated into mobile phones, and feel