Questyle M15iThe Questyle M15i is the second-generation, MFi-certified update to our award-winning high performance portable M15 DAC/amp. M15i boasts near-universal compatibility with any mobile device or computer 3.5mm and 4.4mm output with selectable gain, provides higher level of power for a wider range of headphones Can handle up to PCM768kHz/32bit and DSD512 Optimizes power consumption to prevent premature phone battery drainage Ultra-low noise floor of -130dB for a pure background, and ultra-low distortion levels of 0.0003% Supports high resolution soundThe M15i features the highly acclaimed ESS ES9281AC flagship DAC, which can handle up to PCM768kHz/32bit and DSD512. It’s almost inconceivable that something as small as the M15i can process and reproduce such demanding audio formats.MFi certificationThe "i" in M15i indicates that it has been certified by Apple's MFi. MFi certification ensures perfect support for iPhone/iPad and seamless integration into the iOS and macOS ecosystem. It complies with the stringent requirements for external devices in terms of power consumption and compatibility, avoiding the risk of damage to phones and systems from arbitrary USB device pairings. Dual headphone outputsThe M15i, equipped with four current mode amplification engines, 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, making it suitable for a wide range of apps and devices. Full Compatibility for True Lossless EnjoymentDuring the development, Questyle Labs conducted extensive testing and targeted optimization of M15i's compatibility with mainstream smartphones and tablets. Developers managed to achieve high compatibility with iOS, HarmonyOS, Android versions 5.1, etc. As for PC, it supports Windows 10 version 18.3 and above (driver-free) as well as Mac OS systems. Hence, all Hi-Fi headphone users can enjoy lossless audio on streaming platforms anytime, anywhere. Powerhouse Current-Mode AmplificationThe M15i contains two groundbreaking "current mode" patented amplification SiP modules developed by Questyle Technology. Given that it operates in the current domain, the low impedance characteristics of the current-mode circuitry result in a bandwidth of up to 1MHz and distortion as low as 0.0003%, capturing details hidden in the soundtracks. As a result, the risk of overheating or interruptions during long listening sessions is extremely low thanks to the patented current mode amplification, TOREX‘s efficient power management system, as well as the M15i’s high-performance and low-power consumption. Comparison to predecessor M15 M15i M15 Apple MFi certification, ensures high performance and compatibility with iPhone/iPad and the Apple ecosystem no Apple MFi certification supports up to PCM768 and DSD512 supports up to PCM384 and DSD256, plus MQA support Data status indicator:1)single red indicator lights up means sampling rate≦48Khz2)dual red indicators lights up means sampling rate >48Khz Data status indicator:1)green indicator lights up means sampling rate≦48Khz2)red indicator lights up means sampling rate >48Khz3)magenta indicator lights up means MQA mode sampling Gain status indicator:1)single red indicator lights up means Standard Gain2)dual red indicators lights up means High Gain Gain status indicator:1)green indicator lights up means Standard Gain2)red indicator lights up means High Gain SpecificationsCompatible Operating Systems Android Phones and Tablets: Supports devices running Android 5.0 and above PC Systems: Compatible with devices running Windows 10 version 1803 and above Apple Phones: Supports iOS systems (Requires additional purchase of the Questyle LTC02 Lightning to Type-C adapter when connecting to devices with a Lightning interface.) Apple Computers: Compatible with macOS systems D/A Conversion PCM: PCM: 44.1kHz - 768kHz (16/24/32Bit) DSD: DSD64(1Bit 2.8MHz), DSD128(1Bit 5.6MHz), DSD256(1Bit 11.2MHz), DSD512(1Bit 22.4MHz) Outputs 3.5mm single-ended headphone jack RL=300Ω,Po=11.97mW, Vout(Max)=1.895Vrms,THD+N=0.0003% 4.4mm balanced headphone jack RL=300Ω, Po=22.60mW, Vout(Max)=2.624Vrms, THD+N=0.0003% Frequency Response: ±0.1dB(20Hz-20kHz); ±2dB(20Hz - 80kHz) External Exterior Material: CNC Anodized Aluminum Alloy Color: Black Dimensions: 61.9L X 27.9W X 12D(mm) What's In The Box M15i USB DAC Headphone Amp Type-C to Type-C cable Type-C to USB-A Converter User Manual & Warranty Card
