---
product_id: 612568007
title: "- M15i Headphone Amplifier [MFi Certified] Portable USB C DAC Amps with 4.4mm/3.5mm Dual Outputs Supports PCM 768kHz/DSD512 High Resolution Lossless Audio Adapter for Smartphones/PC/Laptops"
brand: "questyle"
price: "11505749₫"
currency: VND
in_stock: true
url: https://www.desertcart.vn/products/612568007-m15i-headphone-amplifier-mfi-certified-portable-usb-c-dac-amps
store_origin: VN
region: Vietnam
---

# Patented CMA tech: ultra-low distortion 0.0003% Supports PCM 768kHz/DSD512 lossless audio Dual outputs: 4.4mm balanced & 3.5mm single-ended - M15i Headphone Amplifier [MFi Certified] Portable USB C DAC Amps with 4.4mm/3.5mm Dual Outputs Supports PCM 768kHz/DSD512 High Resolution Lossless Audio Adapter for Smartphones/PC/Laptops

**Brand:** questyle
**Price:** 11505749₫
**Availability:** ✅ In Stock

## Summary

> 🎧 Elevate Every Beat — Portable Powerhouse for the Discerning Ear

## Quick Answers

- **What is this?** - M15i Headphone Amplifier [MFi Certified] Portable USB C DAC Amps with 4.4mm/3.5mm Dual Outputs Supports PCM 768kHz/DSD512 High Resolution Lossless Audio Adapter for Smartphones/PC/Laptops by questyle
- **How much does it cost?** 11505749₫ with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.vn](https://www.desertcart.vn/products/612568007-m15i-headphone-amplifier-mfi-certified-portable-usb-c-dac-amps)

## Best For

- questyle enthusiasts

## Why This Product

- Trusted questyle brand quality
- Free international shipping included
- Worldwide delivery with tracking
- 15-day hassle-free returns

## Key Features

- • **Power Meets Precision:** Patented Current Mode Amplifier tech delivers ultra-low distortion (0.0003%) and wide impedance adaptability (8Ω–600Ω) for flawless headphone synergy.
- • **Versatile Connectivity:** Seamlessly compatible with iOS, Android 5.1+, Harmony OS, Windows 10+, and more—your go-to portable amp for any device.
- • **Dual Output Flexibility:** Switch effortlessly between 4.4mm balanced and 3.5mm single-ended outputs with manual gain control tailored to your headphones and listening style.
- • **Audiophile-Grade Clarity:** Experience pristine sound with ESS flagship DAC ES9281AC supporting ultra-high-res PCM768kHz and DSD512 formats.
- • **Compact & Durable Design:** Sleek metal enclosure with lightweight portability ensures high-fidelity audio wherever your hustle takes you.

## Overview

The Questyle M15i is a portable, MFi-certified USB-C DAC headphone amplifier featuring patented Current Mode Amplifier technology for ultra-low distortion and wide impedance support. It supports high-resolution audio up to PCM 768kHz/DSD512, offers dual 4.4mm balanced and 3.5mm single-ended outputs with manual gain adjustment, and ensures broad compatibility across smartphones, PCs, and laptops. Encased in a sleek metal body, it delivers audiophile-grade sound on the go.

## Description

Full description not available

## Features

- [Widely Compatibility] ：Workable well with computers, Smartphones, and Laptops.High compatibility with iOS, Harmony OS, Android versions 5.1+ and Windows 10+ version, enables you enjoy your lossless Music with your preferred device anytime, anywhere.[Important] If there is a device incompatibility issue, please contact us and we can resolve it for you.Any problems with the M15i,we will try our best to help you.
- [Patented AMP design] ：Questyle patented Current Mode Amplifier “CMA” technology (Global PCT Patent Number: US 9,614,483 B2), enables the small device unbeatable performance: low power consumption and heat generation; large bandwidth up to 1MHz, ultra low distortion to 0.0003% and wide range impedance adaptive 8ohm ~ 600ohm, it works with most of the headphones in the market perfectly.
- [Dual Outputs] ：The M15i, equipped with four CMA engines, supports 3.5mm single-ended and 4.4mm fully balanced output. 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.
- [Lossless Sound Processing] ：The M15i features with ESS flagship DAC ES9281AC, the Powerful M15i perfectly handles any signal formats up to PCM768kHz/32bit and DSD512.
- [What You Get] : M15i USB DAC Headphone Amp x1, Type-C to Type-C cable x1,Type-C to USB-A Converter x1, user manual x1, and friendly customer service.If you have any questions, please contact us and we will solve them for you.
- 【Note】：When connecting to Lightning interface devices,you can purchase an additional Questyle LTC02 Lightning to Type-C adapter that has been officially certified by Apple MFi.

## Technical Specifications

| Specification | Value |
|---------------|-------|
| Control Type | Media Control |
| Style Name | Minimalist |
| Theme | High-Fidelity Audio |
| Color | Black |
| Wireless Technology | RF |
| Connectivity Technology | Wired |
| Headphone Jack | 3.5 mm Jack |
| Frequency Range | 20 Hz - 20,000 Hz |
| Audio Driver Type | Dynamic Driver |
| Headphone Folding Features | In Ear |
| Headphones Ear Placement | Over Ear |
| Antenna Location | Music, Gaming, Calling |
| Compatible Devices | Smartphones, Tablets, PCs, Laptops |
| Cable Features | Detachable |
| Additional Features | Lightweight |
| Enclosure Material | Metal |
| Specific Uses For Product | High-fidelity audio playback |

## Product Details

- **Brand:** Questyle
- **Color:** Black
- **Ear Placement:** Over Ear
- **Form Factor:** In Ear
- **Impedance:** 90 Ohms

## Images

![- M15i Headphone Amplifier [MFi Certified] Portable USB C DAC Amps with 4.4mm/3.5mm Dual Outputs Supports PCM 768kHz/DSD512 High Resolution Lossless Audio Adapter for Smartphones/PC/Laptops - Image 1](https://m.media-amazon.com/images/I/61qWsqUbwNL.jpg)

## Questions & Answers

**Q: Would this be compatible with iPhone or Android device?**
A: Fullly Compatible with Devices & Music Platforms, support ios/mac OS/Android/Windows.Plug and Play, no need any driver or setting.

**Q: What should you do if the M15i suddenly stops working?**
A: If your M15i suddenly stops working, it may be because the firmware is missing. You can download the firmware to update the M15i.

**Q: Does this product work with micphone?**
A: Sorry, it can't work with micphone.

**Q: Does this product work for a car's 3.5mm headphone jack?**
A: If you want to use our M15i in your car,you need to buy a 3.5mm to 3.5mm OTG cables.

**Q: Does this product work with 250 ohm impedence headphone?**
A: Of course it dose,our M15i can work with 8Ω-600Ω  impedence headphone perfectly.

## Frequently Bought Together

- Questyle M15i Headphone Amplifier [MFi Certified] Portable USB DAC Amps with 4.4mm and 3.5mm Dual Outputs Supports PCM 768kHz/DSD512 High Resolution Lossless for Smartphones/PC/Laptops
- Questyle USB C DAC OTG Cable 1.2m,4ft Audio Adapter for iPhone 13/12/11/X/8/7/6/Plus, iPad Pro/Air/Mini, iOS15 to Type C Male Adaptor(Only fit for Amplifier M12i M15i)
- M15i Headphone Amps USB DAC Case

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*Product available on Desertcart Vietnam*
*Store origin: VN*
*Last updated: 2026-03-09*