Questyle M15i front view for portable, high-fidelity music on the go.
Questyle M15i back ports showing versatile USB-C and audio outputs.
Questyle M15i 3.5mm output for clean, single-ended listening.
Questyle M15i 4.4mm balanced output for detailed headphone sound.
Questyle M15i ESS DAC chip delivering precise micro-details.
Questyle M15i MFi-certified for seamless iPhone compatibility.
Questyle M15i packaging contents ready for quick setup.
Questyle M15i used in real-world scenarios with mobile devices.
Questyle M15i note on Lightning adapter compatibility.

Questyle

Questyle M15i Mobile DAC Amp — MFi Certified, ESS DAC, 3.5mm & 4.4mm Outputs

Free U.S. shipping and free 30-day returns. Check the compatible models in the description below.

$248.19

In stock. Ships free, usually within 1–4 business days.

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Check the listed compatible models and specs before you order. Questions? Email us.

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Free tracked shipping on every order. Most orders arrive within 3–8 business days.

Free 30-day returns

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Return eligible items within 30 days of delivery for a full refund. We email you a prepaid return label.

Peak-demand shipping delays

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During high demand, deliveries may experience short carrier delays. Tracking updates remain active for every order.

Email support

Questions about fit or an order? Email nexoltic@gmail.com. We reply on business days (Mon–Fri).

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Product details

Pocket-sized, desktop-grade sound in your pocket

The Questyle M15i pairs a compact, rugged chassis with a studio-class audio path, inviting you to explore your music with precision. Built around an ESS flagship DAC and Questyle’s patented Current Mode Amplification, it delivers low distortion, fast transients, and a warm, natural balance that can reveal nuanced textures in familiar recordings.

Key capabilities at a glance

  • Wide device compatibility: works with iPhone, iPad, Android devices, HarmonyOS, and Windows PCs—plug in and go with confidence.
  • Dual outputs for any headphones: 3.5mm single-ended and 4.4mm balanced, with a gain switch to tailor the drive for sensitive IEMs or power-hungry full-size cans.
  • Flagship ESS DAC and high-resolution decoding: PCM up to 768 kHz / 32-bit and DSD512 decoding for subtle micro-details and dynamic range.

Seamless compatibility with iPhone and Android

  • Official MFi certification ensures stable, plug-and-play performance with iPhone, iPad, Mac, and many Android devices, without excess power draw or connection hassles.
  • USB-C connectivity keeps cables tidy on laptops and Android devices that support audio output over USB-C.

What’s in the box

  • M15i USB DAC Headphone Amplifier
  • Type-C to Type-C cable
  • Type-C to USB-A adapter
  • User manual

Note: For Lightning-only devices, Questyle offers the LTC02 Lightning-to-Type-C adapter (officially certified) to enable Type-C connectivity.

In daily use, the M15i behaves as a portable audio companion rather than a branding claim. Its performance depends on your headphones, source material, and listening environment. The design aims to unlock more detail, texture, and dynamics from your music without promising specific outcomes.

FAQ

Q: Is the M15i compatible with iPhone and Android devices?

A: Yes. It works with iOS, HarmonyOS, Android 5.1+, and Windows devices, with official MFi certification for stable iPhone use.

Q: What’s included and how do I start using it?

A: The box includes the M15i, USB-C to USB-C cable, USB-C to USB-A adapter, and manual; simply connect to a compatible device to begin.

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