Nearly every aspect of the technology inside the FiiO M11 Plus Portable High-Resolution Lossless Wireless Music Player has been crafted to deliver audiophiles with a portable solution that's capable of reproducing a clean and authentic listening experience. To achieve this goal, FiiO incorporates their own Digital Audio Purification system (DAPS), dual ES9068AS DACs for incredibly low distortion, dual THX AAA-78 headphone amps for a live concert feel, and MQA 8x decoding for sound quality meant to match the master as closely as possible with compatible MQA files. There are also internal engineering touches made to reduce interference and offer a higher dynamic range, such as using independent power supplies and individual component shielding.

FiiO utilizes the LDAC, aptX, aptX HD, and AAC Bluetooth codecs for a high-quality Bluetooth streaming experience with most compatible devices. The M11 Plus also achieves both Hi-Res Audio and Hi-Res Audio Wireless certifications. When utilizing wired headphones, you're fully supported with three outputs: balanced 2.5 and 4.4mm, and an unbalanced 3.5mm. The 4.4mm headphone output also doubles as a balanced line output, and the 3.5mm jack also provides line output and a coaxial audio output. If you would like to utilize the power inside this handheld player to enhance your PC audio experience, you can use the M11 Plus as a USB DAC. All of this and more can be controlled via the integrated 5.5" 18:9 bezel-less display.