Portable music players are something of a rarity, with S. Korea's Astell & Kern being one of the few companies making such devices-- with the latest being the A&norma SR25, an upgrade on the SR15 launched back in 2018.
The SR25 promises a number of improvements in terms of both hardware and software. Described by the company as a "mass premium" product, it carries two Cirrus Logic 43198 MasterClass DAC in dual-mono configuration like the SR15, and includes 64GB of internal storage (expandable to 1TB via microSD card) with support for DSD256 and 32-bit/384kHz PCM high-resolution audio. Control comes through a 3.6-inch touchscreen, while battery life clocks up to 21 hours on a single charge. Construction is in aluminium, and Astell & Kern says the volume wheel was made using the same machines used for luxury Swiss watches.