FiiO M23 portable music player review: delicate yet muscular, assertive yet subtle, lavishly detailed and vaultingly dynamic

The FiiO M23 arrives as a fairly large, lavishly specified and beautifully constructed digital audio player with a number of technological highlights. It’s ready to power wired or wireless headphones, or to act as a USB DAC in a desktop audio system. And it’s ready to handle anything you care to throw at it – any file type, any file size, any genre of music – with confidence, poise and positivity.