The M15C Combines Four Current Mode Amplification SiP Modules, a Cirrus Flagship USB DAC, and Manual Gain Adjustment for a Compact and Versatile Design M15C boasts near universal compatibility with any mobile device or computer Cirrus Logic Flagship CS43198 DAC chip Can handle up to PCM384kHz/32bit and DSD256 Optimizes power consumption to prevent premature phone battery drainage 3.5mm and 4.4mm output with selectable gain, provides higher level of power for a wider range of headphones Leather protective case and leather MagSafe cover available Audio Innovation In a world of complexity, Questyle embraces simplicity. Their mission is to make high-fidelity audio accessible to every smartphone user, offering effortless access to lossless streaming anytime, anywhere. To meet the ever-growing demand for superior sound quality, they proudly introduce the M15C, their latest mobile DAC and headphone amplifier. Continuing Questyle’s legacy of high-performance audio innovation, the M15C overcomes the technical challenges of smartphone audio circuits. Equipped with four independent Current Mode Amplification SiP modules, Cirrus Logic’s flagship USB DAC, and manual gain adjustment, this compact powerhouse delivers exceptional flexibility and performance. Whether capturing the thunderous depth of a cathedral organ or the electrifying energy of a hard rock guitar, the M15C reveals even the finest details hidden within your favorite tracks, offering an unparalleled Hi-Fi experience on the go. Take the M15C with you wherever life leads—and let it elevate your journey with extraordinary sound. Comprehensive Compatibility The Questyle M15C has been rigorously tested and optimized to ensure seamless compatibility with a wide range of devices, including iOS, HarmonyOS, Android 5.1 or above, macOS, and Windows 10 Version 18.3 or above. It’s completely driver-free, making setup effortless across all platforms. Patented SiP Current Mode Amplifier The M15C contains two groundbreaking "current mode" patented 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 0.00028%, capturing hidden details in songs. As a result, the risk of overheating or interruptions during long listening sessions is extremely low thanks to the patented current mode amplification (TOREX precision power management technology) as well as the M15C's high performance and low power consumption. Full Compatibility for True Lossless Enjoyment During development, Questyle Labs conducted extensive testing and targeted optimization for M15C's compatibility with mainstream smartphones and tablets. Developers managed to achieve high compatibility with iOS, HarmonyOS, and Android versions 5.1 and above. As for PC, it supports Windows 10 18.3 and above (driver-free) as well as macOS. Hence, all HiFi headphone users can enjoy lossless audio on streaming platforms anytime, anywhere. 3.5mm and 4.4mm Dual Ports with Gain Adjustment The M15C, supports 3.5mm single-ended and 4.4mm fully balanced output modes. It also features manual gain adjustment, allowing users to choose the gain mode according to personal preferences, headphone characteristics, or the audio system, rendering the M15C suitable for a wide range of apps and devices. Dynamic Sampling Rate Display When playing music, the data status indicator will light up. A single red indicator means PCM data with a sampling rate not exceeding 48kHz Dual red indicators indicate high-resolution playback, including PCM audio up to 384kHz or DSD audio up to DSD256
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