M15i

The Plug-and-Play Immersive Experience

The M15i is equipped with dual output modes, and features a manual gain adjustment to match any headphone or audio system, making it suitable for a wide range of devices. 

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M15i

The high resolution of the M15i provides an ultra-low noise floor, a pure black background that allows you to enjoy realistic sound anytime and anywhere.

Plug and Play,Convenient User Experience

Questyle's second-generation mobile DAC, the M15i, embodies our finest tech achievements over the past decade. The M15i gives audiophiles lossless audio streaming anytime, anywhere -- and works flawlessly with traditional HiFi headphones, emsuring the best immersive audio experience.

The M15i is equipped with four Current Mode Amplification engines, and supports both 3.5mm unbalanced and 4.4mm balanced headphone connectors. It also features a manual gain adjustment for compatibility with a wide range of devices.

Apple MFi Certified for Guaranteed Performance and Compatibility

The "i" in M15i indicates certification by Apple's MFi program. MFi certification ensures perfect compatibility with iPhone/iPad and the Apple ecosystem. THe M15i meets Apple's strict requirements for external devices, especially in terms of power consumption, to avoid the risk of damage to phones and systems by connecting to arbitrary USB devices.

Full Compatibility for True Lossless Enjoyment

During development, Questyle Labs conducted extensive testing and optimization of M15i's compatibility with mainstream smartphones and tablets. The M15i provides high compatibility with iOS, HarmonyOS, and Android versions 5.1 and above. As for computer systems, it supports Windows 10 (version 18.3) and above w/o driver, and Mac OS. As such, all Hi-Fi headphone users can enjoy lossless audio on streaming platforms anytime, anywhere.

Ultra-Large Dynamics, Capable of Working at High Capacity for Extended Periods Without Interruption

The M15i contains two groundbreaking, patented "current mode" amplification SiP modules developed by Questyle Technology. Its four Current Mode Amplification engines deliver clear, powerful sound. The low impedance characteristics of the current-mode circuit result in a bandwidth of up to 1MHz and distortion as low as 0.0003%, exposing the subtlest details hidden in recordings.

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

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3.5mm and 4.4mm ports, Manual Gain Adjustment,Compatible with More Headphones and Devices

The M15i is equipped with four Current Mode Amplification engines, and supports both 3.5mm unbalanced and 4.4mm balanced headphone connectors. Together with its manual gain adjustment, the M15i is compatible with a wide range of devices.

Supporting Dynamic Sampling Rate Display, No Pygmalion Effect.

 When playing music, the data status indicator will light up.

▪ A single red light indicates PCM data with a sampling rate not exceeding 48kHz.

▪ Two red lights indicate high-sampling-rate PCM data or DSD audio data.

Hardcore Technological Aesthetics

The design of the Kunlun glass window, coupled with the exquisite craftsmanship of the PCB, presents the critical elements of signal processing and the hardcore technological aesthetics.

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Specification

Compatible Operating Systems
  • Android phones and tablets: Supports devices with Android 5.0 and above
  • PC system: Supports devices with Windows 10 version 18.3 and above
  • Apple Phones: Supports iOS systems(Lightning interfaces require an optional Lightning to Type-C adapter. We recommend the Questyle LTC02 adapter.)
  • Apple computers: Supports Mac OS system
D/A converting Capability
  • PCM：44.1kHz – 768kHz (16/24/32Bit)
  • DSD：DSD64(1Bit 2.8MHz) , DSD128(1Bit 5.6MHz), DSD256(1Bit 11.2MHz) DSD512(1Bit 22.4MHz)
Output Interfaces
  • 3.5mm single-ended headphone jack
  • 4.4mm balanced headphone jack
Output Power
  • 3.5mm:RL=300Ω,Po=11.97mW, Vout(Max)=1.895Vrms,THD+N=0.0003%
  • 4.4mm:RL=300Ω,Po=22.60mW, Vout(Max)=2.624Vrms,THD+N=0.0003%
Frequency Response
  • ±0.1dB(20Hz-20kHz)； ±2dB(20Hz - 80kHz)
THD + N
  • 0.0003%
DAC
  • ESS Flagship USB DAC ES9281AC
Design
  • Exterior Material: CNC Anodized Black Aluminum Alloy
  • Color：Black
  • Dimensions：61.9[L] X 27.9[W] X 12[D](mm)
Accessories
  • M15i Mobile Headphone Amplifier with DAC
  • Type-C to Type-C Cable
  • Type-C to USB-A Cable
  • Warranty Card &User Manual

Product Description

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