Questyle M18i

For the first time, you'll be able to enjoy a Questyle dongle that promises leading signal-to-noise ratio numbers.

Helped by the analog volume controls aboard its ESS DACs, increasing and decreasing both signal and noise at the same time, M18i counts on a small-signal that is a lot more linear than the average Questyle, and certainly other dongles.

You'll want to get your music aboard M18i. Integrating Qualcomm's advanced next-generation Snapdragon Sound™ technology, a feature rigorously certified by both Qualcomm and Sony LDAC, M18i delivers an exceptional wireless audio experience.

Questyle have unlocked the potential of Qualcomm's aptX Adaptive and aptX HD audio codecs, enabling the transmission of wireless lossless Bluetooth audio at CD-quality 16-bit 44.1kHz, and high-resolution audio at 24-bit 48kHz and 96kHz, suitable for a wide range of wireless earbuds and headphones.

M18i further enhances user flexibility by supporting seamless transitions between lossless Bluetooth and USB DAC modes, catering to both wired and wireless listening preferences.

Equipped with Bluetooth 5.4, M18i supports a comprehensive suite of audio codecs, including AAC, SBC, aptX, aptX HD, aptX™ Adaptive, LE AUDIO, and 24bit/96kHz LDAC, ensuring compatibility with a diverse array of devices.

Questyle's extensive codec support empowers users to enjoy wireless, high-fidelity Bluetooth audio across all devices that support these codecs, providing a truly versatile and premium listening experience.

Whether you feed M18i by USB or Bluetooth, you'll count upon the advantages of Questyle's current mode amplification. By doing away with the issue of transmission delay in M18i, Questyle virtually eliminates any of the harshness caused by the intermodulation distortion associated with high capacitance, solid-state circuits.

That small signal then takes advantage of being unhindered by capacitance in the signal path. An added benefit from current-mode amplification is that huge signal bandwidth is possible, leading to phase response being accurately preserved in the human hearing range.

Indeed, to hear current-mode is to hear a naturalness to music not encountered before in a conventional circuit, and Questyle build M18i as a premium example of such a topology.

Happily use with any low-impedance device (current signals excel the closer a load is to ground) such as Rosson Audio Designs, the Vision Ears Elysium EXT, plus CIEM heavyweights Craft Ears and Empire Ears – particularly the latter's Triton and Odin.

Driving low impedances is M18i's forte. But bridge-tied load balanced operation now means this dongle also doubles voltage swing compared to single-ended operation, to drive higher impedances credibly too.

It's the complete taste of what modern Bluetooth technology, advanced DACs and a clean battery power supply can add to ever-reliable USB-C connection and current mode amplification. 

To step up is to further benefit your big planar-magnetic headphones in CMA18P here, Otherwise, check out Questyle's other offerings here, or browse all our other mobile DAC/amps here.