The X7 provides access to files and formats that some players—incuding Apple's—don't support.
A number of portable audio players support these audio files, and Fiio, a Chinese company with a solid reputation for low-cost, high-quality audio hardware, has a full range of such devices.
The latest is the Fiio X7 $769 MSRP, $600 on Amazon , an Android-based device that supports nearly all the commonly used audio formats: MP3, AAC, FLAC, Apple Lossless, WMA, WAV, AIFF, APE, and OGG at sampling rates up to 384kHz and up to 64-bit resolution, as well as DSD up to 5.6MHz.
The main body of the device, without the amplifier module, is about the same size as an iPod classic, but much thicker.
The sound is clear and crisp, with a wide, expansive soundstage; it s not overly bass-heavy or tinny, and you can adjust the sound using a built-in equalizer.
The X7 also offers Pure Music Mode, which you can toggle in the settings screen that displays when you swipe down from the top of the display.