FiiO, a leading innovator in high-resolution audio devices, has officially released an upgraded version of its acclaimed JM21 portable lossless music player. The new JM21 (4GB+64GB) model addresses user feedback by doubling internal storage, boosting RAM, and significantly improving battery performance, making it an even more compelling choice for audiophiles seeking premium sound in a compact, budget-friendly package.
The original JM21, launched to widespread praise for its clean audio reproduction, slim design, and versatile Android-based functionality, featured 3GB RAM and 32GB internal storage (approximately 22GB usable). The upgraded variant builds directly on that foundation with meaningful hardware enhancements:
- Storage: Increased to 64GB ROM (approximately 52GB usable), providing ample space for high-resolution audio files without relying solely on microSD expansion (which still supports cards up to 2TB).
- RAM: Upgraded from 3GB to 4GB, ensuring smoother multitasking, faster app loading, and better overall responsiveness when running streaming services or the customized Android 13 OS.
- Battery: A larger 3100mAh capacity (up from 2400mAh) delivers extended playback times—up to 16 hours on single-ended (3.5mm) output and 12.5 hours on balanced (4.4mm) output, compared to the previous 12.5 hours and 9.5 hours respectively.
Signature Ultra-thin profile
These changes maintain the JM21’s signature ultra-thin profile (approximately 120.7 × 68 × 13mm and 156g weight) and core audio architecture, including dual Cirrus Logic CS43198 DACs and dual SGM8262 amplifiers for powerful, detailed, and low-noise performance across a wide range of headphones and IEMs.
The JM21 continues to offer multiple operating modes—Android mode for full app access, Pure Music mode for distraction-free listening, USB DAC mode, Bluetooth receiving, and AirPlay support—while delivering bit-perfect audio thanks to FiiO’s bypass of Android resampling. It remains available in stylish color options like sky blue and black.
Pricing
Priced competitively at around £199 / $210 (with regional variations, such as approximately 1299 yuan in China or ~$250 in some markets), the upgraded JM21 (4GB+64GB) is available now through FiiO’s official channels, authorized retailers, and platforms like AliExpress. Media samples are readily accessible for reviews.
FiiO positions this update as a direct response to consumer needs for greater capacity and endurance in entry-to-mid-level hi-res players, especially as lossless streaming and large personal libraries become more common. The enhancements make the JM21 an even stronger contender in its category, offering exceptional value without compromising on sound quality or portability.
