---
product_id: 635194441
title: "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"
brand: "questyle"
price: "$509.63"
currency: USD
in_stock: true
url: https://www.desertcart.us/products/635194441-m15i-headphone-amplifier-mfi-certified-portable-usb-dac-amps-4
store_origin: US
region: United States of America
---

# Ultra-low distortion 0.0003% Dual 3.5mm & 4.4mm outputs Supports PCM 768kHz/DSD512 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

**Brand:** questyle
**Price:** $509.63
**Availability:** ✅ In Stock

## Summary

> 🎶 Elevate Every Note — Hear What Others Miss

## Quick Answers

- **What is this?** 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 by questyle
- **How much does it cost?** $509.63 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.us](https://www.desertcart.us/products/635194441-m15i-headphone-amplifier-mfi-certified-portable-usb-dac-amps-4)

## 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

- • **Hi-Res Audio Mastery:** ESS flagship DAC ES9281AC handles lossless PCM up to 768kHz and DSD512 for studio-grade clarity.
- • **Customizable Gain Control:** Manual gain adjustment tailors output perfectly to your headphones and listening environment.
- • **Patented CMA Tech Powerhouse:** Global patented Current Mode Amplifier delivers pristine sound with ultra-low power use and heat.
- • **Universal Device Compatibility:** Seamlessly pairs with iOS, Android 5.1+, Windows 10+, and Harmony OS for on-the-go audiophile bliss.
- • **Dual Balanced & Single-Ended Outputs:** Switch effortlessly between 4.4mm balanced and 3.5mm single-ended for ultimate headphone flexibility.

## Overview

The M15i Headphone Amplifier is a portable, MFi-certified USB DAC amp featuring patented Current Mode Amplifier technology for ultra-low distortion and power consumption. It supports dual outputs (3.5mm and 4.4mm), high-resolution audio formats up to PCM 768kHz and DSD512, and offers broad compatibility across smartphones, PCs, and laptops, making it the ultimate companion for discerning audiophiles seeking flawless sound anywhere.

## Description

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

## 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.
- [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 |
|---------------|-------|
| ASIN | B0CK71PX43 |
| Additional Features | Lightweight |
| Age Range Description | Adult |
| Antenna Location | Music, Gaming, Calling |
| Audio Driver Type | Dynamic Driver |
| Best Sellers Rank | #61,950 in Electronics ( See Top 100 in Electronics ) #117 in Headphone Amps |
| Brand Name | Questyle |
| Built-In Media | Cable |
| Cable Features | Detachable |
| Carrying Case Color | Black |
| Color | Black |
| Compatible Devices | Smartphones, Tablets, PCs, Laptops |
| Connectivity Technology | Wired |
| Control Method | Touch |
| Control Type | Media Control |
| Controller Type | Wired |
| Customer Package Type | FFP |
| Customer Reviews | 4.0 4.0 out of 5 stars (135) |
| Earpiece Shape | Rounded Tips |
| Enclosure Material | Metal |
| Frequency Range | 20 Hz - 20,000 Hz |
| Headphone Folding Features | In Ear |
| Headphone Jack | 3.5 mm Jack |
| Headphones Ear Placement | Over Ear |
| Impedance | 90 Ohms |
| Is Autographed | No |
| Item Weight | 0.1 Kilograms |
| Manufacturer | Questyle |
| Model Name | M15i |
| Model Number | M15i |
| Noise Control | None |
| Number of Items | 1 |
| Number of Power Levels | 2 |
| Sensitivity | 90 Ohm |
| Series Number | 15 |
| Specific Uses For Product | High-fidelity audio playback |
| Style Name | Minimalist |
| Theme | High-Fidelity Audio |
| UPC | 799194388246 |
| Warranty Description | 1 year warranty |
| Wireless Technology | RF |

## Product Details

- **Brand:** Questyle
- **Colour:** Black
- **Ear placement:** Over Ear
- **Form factor:** In Ear
- **Impedance:** 90 Ohms

## Images

![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 - 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 United States of America*
*Store origin: US*
*Last updated: 2026-05-18*