![Questyle M15i DAC/Amplificador Portátil (Caixa Aberta) [Full Warranty]](https://questyleshop.com/cdn/shop/files/DSC02690_1.jpg)
Questyle M15i DAC/Amplificador Portátil (Caixa Aberta) [Full Warranty]
Best portable DAC for audiophiles seeking high-fidelity sound on Apple devices.
Experience high-fidelity audio on the go with the Questyle M15i Portable DAC/Amplifier. This open-box unit offers exceptional sound quality, powered by four patented dual current mode amplification modules and an upgraded ESS ES9281AC DAC chip. It supports high-resolution audio up to DSD512 and PCM768, ensuring every note is rendered with clarity. Enjoy seamless integration with Apple devices thanks to MFi certification, and versatile connectivity with 3.5mm single-ended and 4.4mm balanced outputs. Manual gain adjustment allows for perfect headphone matching.
$224.10
Owner Satisfaction
4.7
/ 5
Category Rank
53
/ 807
#53 in Headphone Amplifiers
Price vs Category Average
-84%
Below average
DAC Chip
9281
/ ESS ESAC
Who it's for
- Audiophiles seeking ultra-low distortion and high-fidelity sound
- Value-focused buyers wanting premium performance at a discount
- Listeners using demanding, high-impedance headphones
Who should skip it
- Budget-conscious shoppers looking for entry-level pricing
- Mobile users prioritizing long smartphone battery life
- Travelers needing a compact, cool-running portable device
Performance breakdown
Audio Fidelity
Current mode amplification delivers exceptional clarity and high-resolution detail.
Device Compatibility
MFi certification ensures seamless, plug-and-play performance with all Apple devices.
Build Quality
CNC anodized aluminum provides a premium feel and robust daily durability.
Output Versatility
Dual 3.5mm and 4.4mm outputs accommodate a wide range of headphones.
Gain Control
Manual adjustment allows for precise matching with various headphone impedance levels.
Noise Floor
Ultra-low noise floor ensures a pristine, silent background for your music.
Key Specs
DAC Chip
ESS ES9281AC
PCM Support
Up to 768 kHz (32 bits)
DSD Support
Up to DSD512
Output Interfaces
3.5mm single-ended, 4.4mm balanced
3.5mm Output Power (RL=3000)
11.97 mW
4.4mm Output Power (RL=3000)
22.60 mW
Total Harmonic Distortion + Noise (THD+N)
0.0003% (at RL=3000)
Noise Floor
-130dB
Features
- Apple MFi Certified for seamless integration
- Four patented dual current mode amplifiers
- Ultra-low distortion and noise floor
- Upgraded ESS ES9281AC DAC chip
- 3.5mm and 4.4mm balanced outputs
- Manual gain adjustment for headphone matching
- Supports high-resolution audio up to DSD512
- Open Box with full 1-year warranty
What customers say
The Questyle M15i is highly regarded as a benchmark portable DAC/Amp, primarily due to its Current Mode Amplification technology. Users consistently praise the resulting sound signature for being exceptionally clean, transparent, and detailed. This device offers impressive power reserves, easily driving everything from sensitive IEMs, benefiting from the low noise floor, to demanding planar magnetic headphones. The inclusion of both 3.5mm and 4.4mm outputs adds significant versatility. When acquired as an Open Box item with a full warranty, the M15i transforms into an outstanding value proposition, overcoming typical cost concerns. It delivers reference grade audio performance in a compact format, making it a strongly recommended upgrade for enthusiasts prioritizing fidelity and power.
Know before you buy
An open-box unit is a product that has been returned or used for display purposes. This M15i has been inspected to ensure it functions perfectly and comes with the full 1-year manufacturer warranty, offering the same performance as a brand-new unit at a better value.
Yes, the M15i is Apple MFi certified, meaning it is fully compatible with iPhones and iPads. It provides a seamless plug-and-play experience without the need for additional camera adapters or complex workarounds.
The 3.5mm output is standard for most consumer headphones and IEMs. The 4.4mm balanced output provides higher power and better channel separation, which is ideal if your headphones support balanced cables and you want to maximize their performance.
Manual gain adjustment allows you to optimize the output power for your specific headphones. You can set it to low gain for sensitive in-ear monitors to avoid background hiss, or high gain to provide enough power for more demanding over-ear headphones.
No, the M15i is powered directly by your source device, such as your smartphone, tablet, or computer, via the USB-C connection. It does not contain an internal battery, making it lightweight and convenient for travel.
Yes, the M15i is compatible with Android 5.0+ and Windows 10 (v1803+) and later. It functions as a high-quality external sound card for your devices, significantly improving audio fidelity over standard onboard headphone jacks.
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$224