Description
Dual Headphone Outputs for Versatile Listening
The M15i, equipped with four current mode amplification engines, supports both 3.5mm single-ended and 4.4mm fully balanced output modes. This versatility makes it compatible with a wide range of applications and devices, catering to various audio preferences and setups.
Crystal Clear Audio with Ultra-Low Noise Floor
Just as a pure black background enhances the vibrancy of colors, a low noise floor is essential for capturing audio details. The M15i boasts a high resolution that contributes to an ultra-low noise floor of -130dB, verified in Questyle Lab's testing environment. This ensures true high-fidelity sound reproduction.
Compact and Portable Design
The M15i's compact size makes it incredibly convenient for users on the go. Its portability ensures that you can enjoy high-quality audio anytime and anywhere, without the bulk of traditional DACs and amps.
Full Compatibility for True Lossless Enjoyment
Questyle Labs has optimized the M15i for compatibility with mainstream smartphones and tablets. It supports iOS, HarmonyOS, and Android versions 5.1 and above, as well as PC systems running Windows 10 version 18.3 and above (driver-free) and Mac OS. This broad compatibility allows Hi-Fi headphone users to enjoy lossless audio on streaming platforms seamlessly.
Apple MFi Certification for Enhanced Performance
The "i" in M15i signifies its Apple MFi certification, ensuring perfect compatibility with iPhone/iPad and the broader Apple ecosystem. This certification guarantees that the M15i meets Apple's strict standards for power consumption and compatibility, safeguarding your devices from potential damage caused by non-certified USB connections.
Dynamic Sampling Rate Display for Easy Monitoring
The M15i features a data status indicator that lights up during music playback. A single red indicator signifies PCM data with a sampling rate not exceeding 48kHz, while dual red indicators represent high-sampling-rate PCM data or DSD audio data. This feature allows users to easily monitor the sampling rate of their audio.
The Questyle M15i Portable DAC & Amp combines exceptional audio quality with versatile functionality and broad compatibility, making it an ideal choice for discerning audiophiles.
APPEARANCE
Material: CNC machined aluminium
Colour: Black
Size: 61.9mm x 27.9mm x 12mm
COMPATIBLE OPERATING SYSTEMS
Android phones and tablets: Android 5.0 and above
PC: Win10 1803 and above
Apple cellphone: iOS (You need to buy an OTG cable for Lightning to USB-C)
Apple computer: Mac OS
DAC CAPABILITY
PCM: PCM: 44.1kHz – 768kHz (16/24/32Bit)
DSD: DSD64 (1Bit 2.8MHz), DSD128 (1Bit 5.6MHz), DSD256 (1Bit 11.2MHz), DSD512 (1Bit 22.4MHz)
OUTPUT POWER
3.5mm:
RL=300Ω | Po=11.97mW
Vout (Max)=1.895Vrms
4.4mm:
RL=300Ω | Po=22.6mW
Vout (Max)=2.624Vrms
FREQUENCY RESPONSE & THD
Frequency Response: ±0.1dB (20Hz-20kHz) | ±2dB (20Hz-80kHz)
THD+N: 0.0003%
DAC: ESS flagship USB DAC chip ES9281AC
IN THE BOX
M15i Mobile Headphone Amplifier with DAC
USB Type-C to Type-C Cable
USB Type-C to Type-A Cable
Warranty Card
User Manual
Warranty Period: 1 Year from the date of Invoice
Covered: Manufacturing Defects Only
Warranty Form: https://www.theaudiostore.in/pages/warranty-claim-form
Questyle Audio is a brand committed to exploring cutting-edge lossless audio technology, with the aim of offering perfect sound aesthetics and a seamless listening experience. We specialize in creating desktop and portable DAC & amplifier solutions, designed to enhance your audio experience to the fullest.
Best killing audio sound👌
Description
Dual Headphone Outputs for Versatile Listening
The M15i, equipped with four current mode amplification engines, supports both 3.5mm single-ended and 4.4mm fully balanced output modes. This versatility makes it compatible with a wide range of applications and devices, catering to various audio preferences and setups.
Crystal Clear Audio with Ultra-Low Noise Floor
Just as a pure black background enhances the vibrancy of colors, a low noise floor is essential for capturing audio details. The M15i boasts a high resolution that contributes to an ultra-low noise floor of -130dB, verified in Questyle Lab's testing environment. This ensures true high-fidelity sound reproduction.
Compact and Portable Design
The M15i's compact size makes it incredibly convenient for users on the go. Its portability ensures that you can enjoy high-quality audio anytime and anywhere, without the bulk of traditional DACs and amps.
Full Compatibility for True Lossless Enjoyment
Questyle Labs has optimized the M15i for compatibility with mainstream smartphones and tablets. It supports iOS, HarmonyOS, and Android versions 5.1 and above, as well as PC systems running Windows 10 version 18.3 and above (driver-free) and Mac OS. This broad compatibility allows Hi-Fi headphone users to enjoy lossless audio on streaming platforms seamlessly.
Apple MFi Certification for Enhanced Performance
The "i" in M15i signifies its Apple MFi certification, ensuring perfect compatibility with iPhone/iPad and the broader Apple ecosystem. This certification guarantees that the M15i meets Apple's strict standards for power consumption and compatibility, safeguarding your devices from potential damage caused by non-certified USB connections.
Dynamic Sampling Rate Display for Easy Monitoring
The M15i features a data status indicator that lights up during music playback. A single red indicator signifies PCM data with a sampling rate not exceeding 48kHz, while dual red indicators represent high-sampling-rate PCM data or DSD audio data. This feature allows users to easily monitor the sampling rate of their audio.
The Questyle M15i Portable DAC & Amp combines exceptional audio quality with versatile functionality and broad compatibility, making it an ideal choice for discerning audiophiles.
APPEARANCE
Material: CNC machined aluminium
Colour: Black
Size: 61.9mm x 27.9mm x 12mm
COMPATIBLE OPERATING SYSTEMS
Android phones and tablets: Android 5.0 and above
PC: Win10 1803 and above
Apple cellphone: iOS (You need to buy an OTG cable for Lightning to USB-C)
Apple computer: Mac OS
DAC CAPABILITY
PCM: PCM: 44.1kHz – 768kHz (16/24/32Bit)
DSD: DSD64 (1Bit 2.8MHz), DSD128 (1Bit 5.6MHz), DSD256 (1Bit 11.2MHz), DSD512 (1Bit 22.4MHz)
OUTPUT POWER
3.5mm:
RL=300Ω | Po=11.97mW
Vout (Max)=1.895Vrms
4.4mm:
RL=300Ω | Po=22.6mW
Vout (Max)=2.624Vrms
FREQUENCY RESPONSE & THD
Frequency Response: ±0.1dB (20Hz-20kHz) | ±2dB (20Hz-80kHz)
THD+N: 0.0003%
DAC: ESS flagship USB DAC chip ES9281AC
IN THE BOX
M15i Mobile Headphone Amplifier with DAC
USB Type-C to Type-C Cable
USB Type-C to Type-A Cable
Warranty Card
User Manual
Warranty Period: 1 Year from the date of Invoice
Covered: Manufacturing Defects Only
Warranty Form: https://www.theaudiostore.in/pages/warranty-claim-form
Questyle Audio is a brand committed to exploring cutting-edge lossless audio technology, with the aim of offering perfect sound aesthetics and a seamless listening experience. We specialize in creating desktop and portable DAC & amplifier solutions, designed to enhance your audio experience to the fullest.
Best killing audio sound👌
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Let customers speak for us
from 5059 reviews
I have used lots of TWS even high end of Samsung and Oppo worth 10K. But IEM sound signature is great! This is my second IEM. I had KZ-ZEX. It has dual driver with electrostatic. Compare with that MoonDrop Chu 2 is better clear and smooth sound signature even with single driver. I am using with Audiocular DAC cost 750. Just go with MoonDrop Chu 2 if you are music lover. Thanks.
Great packaging and quick delivery
Loved the theme of the store and the support of the customer service for every problem I faced. I would be interested in buying new things from the audio store in future.
Good Quality and got a clear case for the player.
Thank you 😊

The quality is great, I felt that the base got a bit reduced and mids and treble enhanced using the same. They look premium. The only downside is that they are slightly bulky as the cable is 16 core and sometimes you can feel it behind the ears. Overall a great cable to upgrade your entry level iems to support balanced output

After going through many websites, I came to know about this particular dac, which is purely oriented on audio amplification with dedicated chip unlike other dacs available under 2k, so ordered and received in two days, to my surprise it has significantly enhanced the audio experience on oneplus 13R, with wired earphones (redmi hi-res of 500 INR), usb type a to c adaptor really came into handy and detected as HiFi audio in my dell laptop, cherry on the cake was the pouch, I didn't expect a pouch, very happy with the purchase...

Visited thier store cum experience center it was very great place for sound lovers . Especially like their display of products in thier demo room.The Owner /Staff were cooperative and also suggested me several IEM's before i select one.

I was looking for IEM Tangzu but they were loud and bass was little low as per my ears.Owner or Associate at store suggested me Audicular i liked the sound as well as bass effect its great product.
The Sennheiser IE 200 delivers impressive value for the price. Comfort-wise, they’re lightweight and fit snugly thanks to the ergonomic design and included foam/silicone tips—great for long listening sessions. Build quality is solid despite the plastic housing, and the detachable braided cable adds durability. As for the sound signature, it’s balanced and clean—tight bass, clear mids, and smooth treble without harshness. Bonus points for the dual-tuning feature that lets you slightly tweak the sound. A fantastic entry-level choice for anyone looking to step into the audiophile world.
There sound is pretty good
Good quality
a very well made cable from Dunu with modular plugs and a very secure fastening system (q lock), no microphonics noted, contrary to many reports, usage : Shure se215 + 4.4 plug + Hiby r4 and it really opens up the Shures and the over ear loops are very comfortable too
This is really warm sounding as advertised. Especially vocals are more engaging. The fact that its driven by phone power doesn't affect the sound quality in anyway like in other dacs I have experienced brighter, thin sound or few peaks in upper midrange. If earphones are having good sensitivity then this dac provides good enough power. Although bit bulky build is very good. I'm sure it can withstand frequent drops also. Have not tried the filters and listening to default filter only. One thing I noticed is although on paper power output is good for 32ohm its only good at driving earphones and not headphones. Distortion kicks in when volume is increased even at high gain setting. I'm only guessing current supplying capability for dynamic driver headphones is not sufficient. Tested with 300ohm HD600.
The sound quality is so much better than any other wireless earphones
The quality of wire is superb.
The mic quality is also good.
Length and feel of wire is good. Sound quality with my Tangzu warner is excellent