Questyle M15i Mobile DAC Amp - MFi Certified Headphone Amplifier,ESS Flagship DAC, 3.5mm/4.4mm Balanced Output, Supports PCM 768kHz/DSD512 Portable USB C Audio Adapter for iPhone, Android, Laptop
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Availability:
In Stock.
Arrives
Saturday, Jul 25
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Color: Black
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 Current Mode Amplification] Desktop-Level Performance in Your Pocket Experience the signature Questyle sound with our patented Current Mode Amplification. Unlike traditional voltage amps, the M15i offers ultra-low distortion and high-speed transient response, delivering a natural, warm, and high-fidelity sound that brings your lossless music to life.
- [Dual Output: 3.5mm & 4.4mm Balanced] Drive Any Headphone with Ease Featuring both 3.5mm single-ended and 4.4mm balanced outputs, the M15i is designed for versatility. With a manual Gain Adjustment switch, it can delicately drive sensitive In-Ear Monitors (IEMs) without background hiss, or provide massive power to drive demanding full-sized headphones.
- [Flagship ESS DAC & Hi-Res Support] Pure Audiophile Grade Decoding Equipped with the flagship ESS ES9281AC DAC chip, the M15i supports hardware decoding for PCM up to 768kHz/32Bit and DSD512. Whether you are streaming from Tidal, Qobuz, or Apple Music, youll hear every micro-detail and subtle nuance of the original recording.
- [Official MFi Certified] Seamless Compatibility for iPhone 17/16 & More Enjoy peace of mind with MFi Certification. The M15i ensures 100% compatibility and stable connection with the latest iPhone 17/16 series, iPad, Mac, and Android devices. Plug-and-play performance without the battery drain or "device not supported" errors found in non-certified adapters.
- [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.
Brand: Questyle
Color: Black
Ear Placement: Over Ear
Form Factor: In Ear
Impedance: 90 Ohms
Brand Name: Questyle
Model Number: M15i
Model Name: M15i
Built-In Media: Cable
Age Range Description: Adult
Warranty Description: 1 year warranty
Customer Package Type: FFP
Number of Items: 1
Series Number: 15
UPC: 799194388246
Manufacturer: Questyle
Is Autographed: No
Headphones Ear Placement: Over Ear
Headphone Folding Features: In Ear
Earpiece Shape: Rounded Tips
Control Type: Media Control
Control Method: Touch
Controller Type: Wired
Impedance: 90 Ohms
Noise Control: None
Sensitivity: 90 Ohm
Audio Driver Type: Dynamic Driver
Frequency Range: 20 Hz - 20,000 Hz
Enclosure Material: Metal
Specific Uses For Product: High-fidelity audio playback
Antenna Location: Music, Gaming, Calling
Compatible Devices: Smartphones, Tablets, PCs, Laptops
Cable Features: Detachable
Additional Features: Lightweight
Number of Power Levels: 2
Headphone Jack: 3.5 mm Jack
Connectivity Technology: Wired
Wireless Technology: RF
Color: Black
Style Name: Minimalist
Carrying Case Color: Black
Theme: High-Fidelity Audio
Item Weight: 0.1 Kilograms
Unit Count: 1.0 Count
Frequently asked questions
If you place your order now, the estimated arrival date for this product is:
Saturday, Jul 25
Yes, absolutely! You may return this product for a full refund within 30 days of receiving it.
To initiate a return, please visit our Returns Center.
View our full returns policy here.
To initiate a return, please visit our Returns Center.
View our full returns policy here.
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Top Amazon Reviews
I loved this dongle amp/dac. It has a very clean and neutral presentation and I've driven a 64 Audio U4s IEM, a closed-back Focal Stellia, and an open-back Focal Utopia with this little thing. No problem with any of these and it's particularly good from it's balanced 4.4mm output. I'd also like to note that Questyle's usb-c to Lightning cable (unfortunately it needs to be purchased seperately) is one of only two brands of "short" dongle cables that I have not had issue with (even the high-end cable can exhibit too much wiggle in the Lightning port, causing the dac/amp to disconnect). However, I did have a problem. The M15i died on the 6th day. It simply would not connect or power on. Note that it was not due to a bad cable; I tried several others and none worked. That said, I love this dac/amp so much that rather than return for a refund, I requested a replacement. I'm hoping I will be able to return with a positive update, but for now I have to give this a low rating. UPDATE: The M15i mysteriously came back to life. Not sure if it suffered thermal shutdown (note that the case was cool when it died the previous day). Currently sounds great, but I'm still going to return this one when the replacement arrives as I fear this may happen again. Do note that I'm still going for a replacement rather than a refund because I love it that much. 2nd UPDATE: Replacement M15i arrived and it has been stable. Customer support was good, although replacement took longer than expected to arrive. I guess replacements do not qualify for Prime shipping; I should have returned for a refund and then bought a new one (that would still qualify for 2-day Prime shipping). Despite having run into a shutdown issue on the first unit, this is still currently my favorite dongle dac/amp. It gives me the mobility I want while using some high-end IEMs.
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Reviewed in the United States on May 4, 2024 by Gilman Wong
This thing sounds fantastic. I am using it with $900 Sure SE846 headphones. I haven't listened to any other dongle DACs so I don't have much for comparison, but compared to other audio equipment I've listened to over the years, this thing is precise and musical. It has a lively sound, playing FLACs from my iPhone via Doppler app. Just sitting and listening to music, doing nothing else, is very enjoyable now. The device seems to work best with Apple devices. I tried using it with my Windows desktop PC, but the sound was not nearly as good. I have no idea why. I won't bore you with a subjective description of the sound, just know it may be hit or miss with Windows. I haven't tried it with Linux yet. Fortunately I only need it for use with my Macbook Air and iPhone, but more compatibility is always good. The only improvement I could suggest to the manufacturer would be a small volume dial. From what I have heard while cruising the internet, software volume control causes a reduction of the sound quality. I have no idea if this is true, but supposing it is, it could be avoided with a volume dial. The sound and detail on this device is great so it may be beyond my ability to hear. If you're considering this device, just get it. I almost got a DAP instead of this DAC, but I'm glad I got this. While it does limit the compactness of the phone, I think it is better than fiddling with a crappy version of Android on one of the many DAPs out there. Until a new version of the iPod is released, I think this is the way to go. You probably have better battery on your phone with this plugged in than you would with many of the DAPs running Android anyway. I'm just a guy yapping, make your own choices. But know that this thing definitely has brought me happiness and I hope you enjoy it, too.
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Reviewed in the United States on November 24, 2024 by Davis Dye
My current headphone setup is about $5,500 without including headphones. A Holo Bliss KTE, a Holo Cyan 2, and a Holo Red Streamer. As far as sound quality goes, this tiny $250 thing is punching closer than it should to my big setup. It doesn't have as much power obviously, and doesn't sound as big, but it's still very impressive. I have only used 4.4 balanced with this dongle because using 3.5 dramatically reduces output. So, using 4.4 balanced, I've tried Hifiman HE1000SE, Sennheiser HD600, and ZMF Bokeh. It's not ideal for high impedance like HD600 @ 300 ohm. But it is acceptable performance for 300 ohms and would probably satisfy most people. It drives the HE1000SE and Bokeh very well. There were moments where I just shook my head and felt a bit silly, because sure my $5,500 setup sounds twice as good as this $250 dongle. But at 22 times the price. That should impress even the most skeptical listeners. Also, it's portable! This thing is a clear winner and an incredible value.
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Reviewed in the United States on October 8, 2024 by Robert D
Sounded great. Made occasional crackling static noises. Returned.
Reviewed in the United States on May 22, 2026 by Phillip J. Hyun
It worked well for a couple months but now it won’t turn on with my iPhone and does not work entirely for the phone. The audio quality was good but paying this price for something that won’t work after a couple months is not very good. This product is way too expensive for use problems. It was used very lightly and not damaged so there is no reason it does not work anymore. I am unable to reach out to questyle about the warranty replacement as they will not respond and there is no way to contact through Amazon it seems. I cannot sell it as I am unable to test if it even works anymore. Overall 2 stars for good audio quality but not any higher due to the quality control issues and lack of customer support. Not recommend.
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Reviewed in the United States on January 8, 2025 by Jaegar Horstman
The M15i delivers outstanding sound quality, especially when paired with a device that can provide full power over USB-C. I noticed a significant difference in volume when driving my unmodified DT770 Pro 80-Ohm headphones with an iPhone 16 Pro Max compared to an iPad Pro or Mac Studio. This suggests that a higher power delivery from your source device really boosts its performance. I'd highly recommend the Questyle M15i for anyone looking for a portable DAC with superb audio.
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Reviewed in the United States on May 30, 2025 by Nom De Guerre
Great bang for the buck. I make use of both 3.5 and 4.4 balanced jack iems, and both hi and low gain and dac mode confirmation LEDs. Perfect with a good pair of iems. Would need very sensitive cans, which means usually better off with a larger amp for over-ear headphones. This is a DAC/AMP that I highly recommend. Note that it is fussy about the usb-c digital source cable connections. The included shorty cable always works, but many other (cheaper) cables won't, which may constrain use with some sources.
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Reviewed in the United States on December 21, 2025 by S. Rodrick
I've owned 4 of these. The first had issues with the usb-c port and would disconnect at the slightest movement. The other 3 consistently had an issue where they would emit a quiet static/sputtering/buzzing sound intermittently. For context, I use it with my iphone 14 plus and macbook air 2025. I will say that this is one of the best sounding dacs I've heard but the consistent issue I've been having with the sound that it emits kinda defeats the point...
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Reviewed in the United States on June 11, 2025 by gavin