Questyle M12i – Portable Hi-Res USB DAC & Headphone Amplifier

The Questyle M12i is a premium portable USB DAC and headphone amplifier engineered to deliver reference-grade Hi-Res audio from your smartphone, tablet, or computer. Featuring a flagship ESS Sabre DAC, Questyle’s patented Current Mode Amplification, and Apple MFi certification, the M12i provides exceptionally clean, powerful, and transparent sound in an ultra-compact form factor.

Designed for audiophiles and music lovers who demand true high-fidelity sound on the go, the Questyle M12i dramatically improves clarity, dynamics, and detail when listening to lossless streaming services, high-resolution audio files, or professional studio recordings.

Key Features & Benefits

• Hi-Res Audio USB DAC & Headphone Amplifier
  Transforms mobile phones, tablets, and computers into high-performance audio sources with true high-resolution playback.
• ESS ES9281AC Flagship DAC Chip
  Supports ultra-high-resolution audio up to 32-bit / 768 kHz PCM and DSD512, delivering exceptional detail, accuracy, and low distortion.
• Questyle Patented Current Mode Amplification
  Proprietary amplifier technology provides ultra-low distortion (0.0003% THD+N), superior transient response, and a remarkably low noise floor for pristine sound even with sensitive IEMs.
• Automatic Impedance Detection & Smart Gain Control
  Intelligently adapts output power to headphones ranging from 8 ohms to 600 ohms, ensuring optimal performance without manual adjustments.
• Apple MFi Certified
  Guaranteed seamless compatibility with iPhone and iPad devices, meeting Apple’s strict audio and power standards.
• Universal Plug-and-Play Compatibility
  Works effortlessly with iOS, Android, Windows, macOS, and HarmonyOS with no drivers required.
• Ultra-Wide Frequency Response
  Faithful, transparent sound reproduction from deep bass to extended high frequencies, preserving the full character of high-resolution recordings.
• Premium CNC Aluminum Housing
  Precision-machined aluminum alloy construction offers durability, excellent heat dissipation, and a sleek minimalist aesthetic.

Technical Specifications

DAC & Audio Decoding

• DAC Chip: ESS ES9281AC
• PCM Support: 16-bit / 24-bit / 32-bit, 44.1 kHz – 768 kHz
• DSD Support: DSD64 / DSD128 / DSD256 / DSD512

Amplifier & Output

• Output Power:
  • 19 mW @ 16 Ω
  • 21 mW @ 32 Ω
  • 12.26 mW @ 300 Ω
• Supported Headphone Impedance: 8 Ω – 600 Ω
• Gain Control: Automatic impedance-based gain switching

Performance

• Frequency Response:
  • 20 Hz – 20 kHz (±0.1 dB)
  • 20 Hz – 80 kHz (±2 dB)
• Total Harmonic Distortion + Noise: 0.0003%
• Noise Floor: < -130 dB

Connectivity & Compatibility

• Input: USB-C
• Headphone Output: 3.5 mm single-ended
• Operating Systems: iOS, Android, Windows 10+, macOS, HarmonyOS

Physical Specifications

• Dimensions: 56.9 × 20.2 × 9.5 mm
• Chassis: CNC-machined anodized aluminum alloy
• Color: Black

What’s in the Box

• Questyle M12i Portable DAC & Headphone Amplifier
• USB-C to USB-C cable
• USB-C to USB-A adapter
• User manual and warranty documentation

Why Choose the Questyle M12i?

The Questyle M12i portable DAC and headphone amplifier delivers uncompromising high-fidelity sound in a compact, travel-friendly design. With its advanced DAC architecture, patented amplification technology, and intelligent auto-gain system, the M12i offers a dramatic upgrade over standard smartphone and laptop audio — making it the perfect solution for audiophiles, professionals, and serious music lovers seeking reference-quality sound anywhere.