The above is a summary for the RMAA tests of the following devices:
Astell & Kern AK240
iBasso DX90
Sharp MD-DR7
iPod shuffle 512
All tests were performed with the same input hardware, a lowly Edirol FA-66. Volume outputs were matched to within 0,5 dB. These are unloaded scores.
(BTW, I like the AK240 more than I care to admit.)