If you have a file named D14.rar , it is a proprietary archive format developed by Eugene Roshal.
: It utilizes the Sabre32 ES9018K2M DAC chip, delivering a neutral to bright performance with excellent clarity and high resolution (up to 32bit/384kHz PCM and native DSD256).
: To access the contents, you must use software like WinRAR , 7-Zip , or PeaZip .
"clean" and "flat" ESS-based sound, recommending it for pairing with warmer gear, while noting that USB DAC/AMP usage yields a lower, ~7-hour battery life compared to other inputs.
Please clarify if you need a deeper hardware review or assistance with the file itself. iBasso D14 Bushmaster Review - Headfonics.com