The FiiO JM21 is a hi-res music player with a Qualcomm Snapdragon 680 processor, Android 13 and two Cirrus Logic CS43198 DACs. It can play music from its internal storage or a microSD card, and supports streaming apps.
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Hardware and apps
The player is powered by a Snapdragon 680 processor built on a 6 nm process, paired with 3 GB of RAM. Android 13 lets you install apps such as TIDAL, Apple Music and Spotify directly on the device. This means you can use the JM21 for both your own music library and streaming services.
Audio components and output power
Two Cirrus Logic CS43198 chips handle digital-to-analog conversion. They are accompanied by two SGM8262 operational amplifiers in the audio output path.
The balanced output delivers up to 700 mW per channel. However, the figure does not specify the load at which it was measured, so it is not enough on its own to determine whether the player is suitable for a particular pair of headphones. The headphones’ specifications also affect the result.
Battery life and dimensions
The battery has a capacity of 2,400 mAh. Playback lasts approximately 12.5 hours through the 3.5 mm output or 9.5 hours through the balanced 4.4 mm output. Actual battery life may vary depending on use.
The player weighs 156 grams and is 13 mm thick, making it suitable for carrying in a pocket or bag.
Storage for your music library
The JM21 has 32 GB of internal storage. For a larger collection, it supports microSD cards up to 2 TB. The extra space is particularly useful for storing more music in hi-res formats for listening without an ongoing internet connection.
Outputs and wireless connectivity
The JM21 offers 3.5 mm and balanced 4.4 mm headphone outputs, plus USB-C and S/PDIF. These allow you to connect headphones and other audio devices, depending on the available interface.
Bluetooth 5.0 supports the aptX HD, LDAC and LHDC codecs. The connected wireless device must also support the relevant codec to use it.
When used as a USB DAC, the player handles signals up to 384 kHz / 32-bit. Digital USB output supports up to 768 kHz / 32-bit and DSD512. These figures describe supported signal formats; they do not by themselves guarantee better sound with every recording or setup.
