Questyle M18i | M18i Max - Mobile DAC & Headphone Amplifier
Questyle M18i | M18i Max - Mobile DAC & Headphone Amplifier
Delivery time approx. 2 weeks
Questyle M18i | M18i Max
Flagship among mobile DACs & headphone amplifiers
The M18i and M18i Max redefine the portable flagship DAC. Equipped with Qualcomm Snapdragon Sound™ technology, an intelligent battery energy management system, and a high-resolution OLED display, they also support HD calls to avoid unpleasant call interruptions. Whether via lossless wireless Bluetooth transmission or in USB DAC mode – the devices deliver an unprecedented high-fidelity listening experience.
Technical highlights
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Patented amplification: Inside are two SiP modules with four groups of Questyle’s extremely low-distortion, patented "Current mode" amplifiers. These combine powerful drive with fine tonality and achieve an extremely low distortion of just 0,0002 %.
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Desktop-class conversion: The flagship ESS combo DAC is used ES9219Q in a dual DAC mono decoding design, paired with a three-tier architecture (TTA – Three-tier architecture).
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Extensive compatibility: The 16-core XMOS XU316 USB platform ensures full compatibility with smartphones, PCs, and gaming consoles. Additionally, the M18i Apple MFi licensed, ensuring perfect and secure integration into the Apple ecosystem.
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Crystal-clear telephony: Thanks to a flagship microphone from Infineon and Qualcomm’s cVc 8.0 solution with ClearVoice Capture-Technology effectively suppresses ambient noise.
Design philosophy: Bauhaus aesthetics
True to the Bauhaus principle "Form follows function, less is more" The devices feature a housing made of pure matte black metal that seamlessly transitions into the display when inactive. All buttons and ports are discreetly placed on the sides to provide a visually unobstructed experience. The layered, exposed internal circuit design creates a fascinating contrast to the minimalist exterior.
Technical data and model comparison
M18i MAX
M18i
| Feature | M18i | M18i Max |
|
Compatible systems |
• Android: From version 5.0 (smartphones & tablets) • iOS: Apple Phones (Lightning requires Questyle LTC02 adapter) • macOS: Apple Computers • Windows: From Version 10 (1803+) (Driver-Free) |
Same Compatibility as M18i |
|
Bluetooth |
Bluetooth 5.4; Supports AAC / SBC / aptX / aptX HD / aptX adaptive / LDAC / LE Audio |
Same Bluetooth Specifications |
|
Call Function |
Supports Voice Calls, Infineon Flagship Microphone |
Same Call Function |
|
Battery Capacity |
500 mAh |
1800 mAh |
|
Battery Life |
• Bluetooth Mode: 3.6 Hours • USB Mode: 2 Hours |
• Bluetooth Mode: 12 Hours • USB Mode: 7 Hours |
|
Decoding Capability |
PCM 44.1 kHz – 384 kHz (16/24/32 Bit); DSD64, DSD128, DSD256 |
Same Decoding Capability |
|
Outputs |
3.5 mm Standard Headphone Jack (Single-Ended), 4.4 mm Symmetrical Headphone Jack (Fully Balanced) |
Same Outputs |
|
Max. Output Current |
1.5 A |
1.5 A |
|
Frequency Response |
±0.1 dB (20 Hz – 20 kHz); ±2 dB (20 Hz – 80 kHz) |
Same Frequency Response |
|
THD+N (Distortion) |
0,0002 % |
0,0002 % |
|
Impedance / Gain |
Two-Stage Gain Control (HIGH, STD) |
Same Gain Control |
|
DAC Chip |
ESS Flagship USB DAC Decoding Chip ES9219Q $\times 2$ |
Same DAC Configuration |
|
Housing Material |
CNC-Anodized Aluminum |
Same Material |
|
Dimensions |
$75 \text{ mm (L)} \times 35 \text{ mm (W)} \times 14.5 \text{ mm (H)}$ |
$86 \text{ mm (L)} \times 55 \text{ mm (W)} \times 15 \text{ mm (H)}$ |
|
Color |
Tech Black (Technical Black) |
Tech Black (Technical Black) |
Intelligent Power Management
Both the M18i and M18i Max feature a sophisticated power management system in collaboration with TOREX:
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Phone Mode: The audio USB port transfers data only. The device is powered entirely by its own internal battery to preserve the smartphone’s battery.
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PC Mode: The USB port transfers data and simultaneously supplies power to the system while charging the internal battery. If the PC connection is power-limited, the device intelligently distributes power and prioritizes system operation over battery charging.
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Simultaneous Listening and Charging: Once a power supply is connected to the dedicated USB charging port, the devices switch to charging mode and support music playback during charging in any mode.
Scope of Delivery and Accessories
Included in the packaging of both the M18i and M18i Max:
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M18i or M18i Max Main Device
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USB Type-C to Type-C Cable
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Type-C to USB-A Adapter
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Warranty Card & User Manual