Questyle M15i Portable DAC/Amp (Open Box)

Apple MFI Certification Ensures High Performance and Compatibility "i" in M15i indicates that it has been certified by Apple's MFi program. MFi certification ensures perfect compatibility with the iPhone/iPad and the Apple ecosystem. It meets Apple's strict requirements for external devices in terms of power consumption and compatibility, avoiding the risk of damage to phones and systems caused by arbitrary connections of USB devices. Equipped with Dual Current Mode Patent Amplification Modules, Ultra-Large Dynamics, Capable of Working at High Volume for Extended Periods Without Interruption The M15i contains two groundbreaking "current mode" patent amplification SiP modules developed by Questyle Technology. Overall, it totals four current mode amplification engines, delivering powerful and clear sound. Given that it operates in the current domain, the low impedance characteristics of the current-mode circuit result in a bandwidth of up to 1MHz and distortion as low as 0.0003%, captur