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Questyle M15

Questyle M15 - M15

Questyle M15 ES9281AC DSD256 HiFi Portable USB DAC Decoding AMP with 3.5mm/4.4 Balanced


Questyle M15 was born: it distills all of Questyle’s expertise and technologies into an amazingly powerful compact mobile DAC & AMP.

Two independent CMA SiP modules

Four total amplification circuits

Greater dynamics, richer details

Supports both 3.5mm and 4.4mm

CNC machined aluminum housing

Stunning transparent cover on top

Don’t be fooled by its small size. The M15 offers uncompromising performance and best-in class fidelity, giving you the ultimate portable audio experience.

In this complex world, we pursue simplicity.

Don’t be fooled by its small size. The M15 offers uncompromising performance and best-in-class fidelity, giving you the ultimate portable audio experience.


The era of 5G has brought music streaming from smart devices fully into the mainstream. As more and more music platforms launch lossless audio streaming services, mobile Hi-Res audio has changed from a neat gimmick into a real and growingly popular way to enjoy high-fidelity music. However, it’s often impractical to use traditional HiFi audio equipment with your smartphone on-the-go, due to size and power consumption. To solve this problem, the M15 was born: it distills all of Questyle’s expertise and technologies into an amazingly powerful yet compact mobile DAC & amp.

Minimalist on the outside, stunning on the inside

Your HiFi, Anytime, Anywhere.

Two Independent SiP, greater dynamics, richer details

The M15 contains two of Questyle’s patented CMA (Current Mode Amplification) SiP modules, for a total of four CMA Ampere engines. This quadruple drive amplification circuitry gives an outstandingly strong output that can drive almost any headphone. Questyle’s current mode amplifiers are characterized by their small footprint, low voltage operation, and minimal power consumption. The current amplification has natural low impedance, affording the M15 a bandwidth up to1MHz, distortion as low as 0.0003%, and the ability to reproduce every detail hidden deep within any track.

3.5mm TRS / 4.4mm TRRS outputs, manual gain adjustment

With its four CMA amp circuits, the M15 supports both unbalanced (3.5mm TRS) and balanced (4.4mm TRRS) outputs. It also has manual gain adjustment via the slider on the side, which makes it easy to choose high/low gain depending on the connected headphone, speaker, or HiFi system.

Impossibly low noise floor, complete sonic immersion. Purest sound, anytime, anywhere

Only a black background can reflect rich color. With its incredibly low noise floor, the M15 allows all the details of your music faithfully ring true.

Background noise of M15 is lower than -125dB

FFT @[email protected](SR)24bit, @3.5mm Po=5.9mW, RL=300Ω

Data from Audio Precision AP2722

Background noise of M15 is lower than -130dB

FFT @[email protected](SR)24bit, @4.4mm Po=23.21mW, RL=300Ω

Data from Audio Precision AP2722

Top-of-the-Line decoding, world-class digital analog

The M15 features the highly acclaimed ESS ES9281AC flagship DAC, which can handle up to PCM384kHz/32Bit and DSD256. It’s almost inconceivable that something as small as the M15 can process and reproduce such demanding audio formats.

TOREX high-efficiency power management

The M15 features TOREX high-efficiency power management, which could bring out low power consumption, no overheating, longer battery life, and longer playback.

The M15 connect you to the streaming era, the easiest way to enjoy any Hi-Res lossless library

The M15 supports almost all music streaming platforms worldwide, including Apple Music, Tidal, QQ Music, among others. It fully supports and decodes ALAC, FLAC, MQA, and other lossless formats.

Unparalleled ease of use, Plug-and-Play

M15 is fully compatible with Android 5.1 and above systems on popular smart phones and tablets.

For PC, it supports Mac OS and Windows 10 version 18.3 and above with no additional driver installation required.

Upgrade your Cables, too

Order custom-made premium cables from Questyle for connecting your HiFi system and specialized equipment…and achieve the lowest possible interference. Our professional-grade cables feature Mogami NEGLEX oxygen-free-copper cores, Neutrik 24K gold-plated pins, and hand-braided nylon sleeves.

Note: These professional-grade cables are not included with the M15.Please purchase separately, according to the needs of your setup.


Model: Questyle M15

DAC: ESS flagship USB DAC chip ES9281AC

Frequency Response: ±0.1dB(20Hz-20kHz)

THD + N: 0.0003%

Material: CNC machined aluminum

Color: Black

Size: 61.8[L] X 27.2[W] X 12[D](mm)

Operating System Required

Android phone and pad: Android 5.0 and above

PC: Win10 1803 and above

Apple cellphone: iOS (You need to buy an OTG cable for Lightning to Type-C.)

Apple computer: mac OS

DAC Capability

PCM: 32kHz – 384kHz (16/24/32Bit)

DSD: DSD64(1Bit 2.8MHz) , DSD128(1Bit 5.6MHz), DSD256(1Bit 11.2MHz)

Output Interface

3.5mm standard headphone jack x1

4.4mm balanced headphone jack x1

Output Power


RL=300Ω, Po=11.97mW, Vout(Max)=1.895Vrms, THD+N=0.00045%


RL=300Ω, Po=22.60mW, Vout(Max)=2.624Vrms, THD+N=0.00057%



USB-A to USB Type-C cable

Type-C to Type-C cable

Instruction manual

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Free Shipping

All listed items will be shipped through Registered Airmail with tracking number if there is no extra shipping option or shipping description at the product page.

Economy shipping: Will be shipped without tracking number.

Registered Airmail : Will be shipped via such as Hong Kong post , Singapore Post, you can leave us a message if you have any requirements about the shipping method .

We can ship the parcel to Canada and Europe countries via tax-inclusive shipping method with extra charge, pls leave us a message if needed.

Express service: Will be shipped via DHL/EMS/UPS/FedEx,Canada and Europe countries will be shipped via tax-inclusive shipping method for free.

  • Views: 707
  • Brand: Questyle
  • Product Code: M15
  • Availability: In Stock
  • $249.00

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