Description
Questyle M18i Wireless Hi-Res DAC & Amp — Studio-Grade Sound, Pocket-Size Freedom
Unleash audiophile-grade sound on the go with the Questyle M18i — a high-performance portable DAC and amplifier that combines advanced Bluetooth 5.4 with true lossless USB decoding. Engineered with dual ESS ES9219Q DACs, patented Current Mode Amplification, and Apple MFi certification, the M18i brings uncompromising audio quality to iOS, Android, PC, and even gaming consoles.
🎧 Flagship-Level Audio. Wireless Freedom.
The M18i is Questyle's most advanced dongle-style DAC/Amp yet, offering dual-mode connectivity via wired USB and Bluetooth 5.4. Whether you're streaming Hi-Res audio wirelessly or decoding lossless tracks via USB-C or Lightning, the M18i ensures seamless, distortion-free playback up to 384kHz/32-bit PCM.
-
Dual ESS ES9219Q DACs: Delivers pristine detail with rich timbre.
-
Bluetooth 5.4 + Snapdragon Sound: Experience ultra-stable, high-resolution wireless audio.
-
Hi-Fi USB Mode with XMOS 316: 16-core processor ensures stable, ultra-low-latency playback.
🔊 Patented Current Mode Amplification
With quad-core SiP CMA modules, the M18i pushes the boundary of portable performance, achieving a near-silent -130dB noise floor and ultra-low 0.0002% distortion. This cutting-edge technology provides the power of a desktop amp in a compact, efficient design, perfect for driving both IEMs and demanding headphones.
🔄 Switch Between Bluetooth & USB DAC Instantly
Switch effortlessly between Bluetooth and USB DAC modes depending on your setup. Enjoy studio-quality sound on the move or at your desk — no compromise, no fuss.
-
3.5mm & 4.4mm Dual Outputs: Supports both single-ended and balanced headphones.
-
Manual Gain Control: Tailor your output to your headphones and preferences.
-
OLED Display & Mic: Includes a clear screen for system status and a mic for calls.
🍏 Apple MFi Certified – Made for iOS
Unlike generic DACs, the Questyle M18i is Apple MFi Certified, ensuring full compatibility with iPhones and iPads. MFi certification guarantees stable performance, optimal power management, and long-term reliability with iOS devices.
⚡ Smart Power Management Modes
-
Mobile Mode: Uses internal battery, keeping your phone fully powered.
-
Bluetooth Mode: Battery-powered for wireless listening anytime, anywhere.
-
PC Mode: Charges and powers simultaneously for desktop use, with intelligent power distribution.
Why Choose Questyle M18i?
-
Hi-Res lossless sound via USB or Bluetooth
-
Dual flagship DACs and patented amplifier tech
-
MFi certified for seamless iOS integration
-
OLED screen, mic, gain control & versatile outputs
-
Ultra-low noise and distortion performance
Compact yet uncompromising, the Questyle M18i redefines what a portable DAC & amp can do. Perfect for audiophiles, gamers, and music lovers who demand the best — wherever they go.
Appearance
Material: CNC Anodized Aluminum Alloy
Color: Black
Size: 75mm x 35mm x 14.5mm
Bluetooth
Version 5.4
Supports: AAC, SBC, aptX, aptXHD, aptX adaptive, LDAC, LE Audio
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-384kHz (16/24/32bit)
DSD: DSD64, DSD128, DSD256
Output Power
4.4mm: 28mW @ 300 ohms
Frequency Response & THD
Frequency Response: ±0.1dB (20Hz-20kHz); ±2dB (20Hz-80kHz)
THD+N: 0.0002%
DAC: (2x) ESS ES9219Q
In the Box
M18i 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.

Description
Questyle M18i Wireless Hi-Res DAC & Amp — Studio-Grade Sound, Pocket-Size Freedom
Unleash audiophile-grade sound on the go with the Questyle M18i — a high-performance portable DAC and amplifier that combines advanced Bluetooth 5.4 with true lossless USB decoding. Engineered with dual ESS ES9219Q DACs, patented Current Mode Amplification, and Apple MFi certification, the M18i brings uncompromising audio quality to iOS, Android, PC, and even gaming consoles.
🎧 Flagship-Level Audio. Wireless Freedom.
The M18i is Questyle's most advanced dongle-style DAC/Amp yet, offering dual-mode connectivity via wired USB and Bluetooth 5.4. Whether you're streaming Hi-Res audio wirelessly or decoding lossless tracks via USB-C or Lightning, the M18i ensures seamless, distortion-free playback up to 384kHz/32-bit PCM.
-
Dual ESS ES9219Q DACs: Delivers pristine detail with rich timbre.
-
Bluetooth 5.4 + Snapdragon Sound: Experience ultra-stable, high-resolution wireless audio.
-
Hi-Fi USB Mode with XMOS 316: 16-core processor ensures stable, ultra-low-latency playback.
🔊 Patented Current Mode Amplification
With quad-core SiP CMA modules, the M18i pushes the boundary of portable performance, achieving a near-silent -130dB noise floor and ultra-low 0.0002% distortion. This cutting-edge technology provides the power of a desktop amp in a compact, efficient design, perfect for driving both IEMs and demanding headphones.
🔄 Switch Between Bluetooth & USB DAC Instantly
Switch effortlessly between Bluetooth and USB DAC modes depending on your setup. Enjoy studio-quality sound on the move or at your desk — no compromise, no fuss.
-
3.5mm & 4.4mm Dual Outputs: Supports both single-ended and balanced headphones.
-
Manual Gain Control: Tailor your output to your headphones and preferences.
-
OLED Display & Mic: Includes a clear screen for system status and a mic for calls.
🍏 Apple MFi Certified – Made for iOS
Unlike generic DACs, the Questyle M18i is Apple MFi Certified, ensuring full compatibility with iPhones and iPads. MFi certification guarantees stable performance, optimal power management, and long-term reliability with iOS devices.
⚡ Smart Power Management Modes
-
Mobile Mode: Uses internal battery, keeping your phone fully powered.
-
Bluetooth Mode: Battery-powered for wireless listening anytime, anywhere.
-
PC Mode: Charges and powers simultaneously for desktop use, with intelligent power distribution.
Why Choose Questyle M18i?
-
Hi-Res lossless sound via USB or Bluetooth
-
Dual flagship DACs and patented amplifier tech
-
MFi certified for seamless iOS integration
-
OLED screen, mic, gain control & versatile outputs
-
Ultra-low noise and distortion performance
Compact yet uncompromising, the Questyle M18i redefines what a portable DAC & amp can do. Perfect for audiophiles, gamers, and music lovers who demand the best — wherever they go.
Appearance
Material: CNC Anodized Aluminum Alloy
Color: Black
Size: 75mm x 35mm x 14.5mm
Bluetooth
Version 5.4
Supports: AAC, SBC, aptX, aptXHD, aptX adaptive, LDAC, LE Audio
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-384kHz (16/24/32bit)
DSD: DSD64, DSD128, DSD256
Output Power
4.4mm: 28mW @ 300 ohms
Frequency Response & THD
Frequency Response: ±0.1dB (20Hz-20kHz); ±2dB (20Hz-80kHz)
THD+N: 0.0002%
DAC: (2x) ESS ES9219Q
In the Box
M18i 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.
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OUR HONEST REVIEWS FROM THE CO-FOUNDERS & AUDIOPHILES
View allTRUSTED BY OVER 35K+ MUSIC ENTHUSIAST
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