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FiiO JM21 specifications and in-depth review

FiiO JM21

Manufacturer: FiiO

The FiiO JM21 is a versatile MP3 player that delivers a solid performance with a sleek, compact design. With 32GB of internal storage and the ability to expand it via an external memory slot, this device offers flexibility for all your music needs. The device features a 4.7″ LCD touchscreen for easy navigation and weighs just 156g, making it a portable option for everyday use. Its 12.5-hour battery life ensures long-lasting performance for listening sessions.

Powered by a Qualcomm Snapdragon 680 chipset, the FiiO JM21 supports a wide range of audio formats, including MP3, FLAC, MQA, DXD, and more. It also includes Bluetooth 5.0 with aptX, LDAC, and AAC codec support for high-quality wireless audio. With a 130 dB signal-to-noise ratio and dual Cirrus Logic CS43198 DACs, it ensures excellent audio output through its 3.5mm, 4.4mm, and USB-C audio outputs. The device operates on Android 13, offering a modern user experience.

Pros
  • The 32GB internal storage is expandable via an external memory slot, providing flexibility for storing more media.
  • Supports a wide range of audio formats including MP3, FLAC, MQA, DSD, and others, ensuring compatibility with various music files.
  • The 12.5-hour battery life offers sufficient playback time for extended listening sessions on the go.
  • Bluetooth 5.0 with support for aptX, LDAC, and aptX HD enables high-quality wireless audio streaming.
  • Compact and lightweight design with a 4.7″ LCD touchscreen, making it portable and easy to use.
Cons
  • Does not support GPS functionality, limiting its use for location-based services.
  • Lacks wireless charging capability, requiring a physical connection to charge the device.
  • Not weather-sealed, so it may not withstand exposure to moisture or adverse weather conditions.
  • Does not support aptX Adaptive or aptX Low Latency for specialized audio performance needs.
Who is this for?

The FiiO JM21 is ideal for users who prioritize portable, high-quality audio with a variety of file format support, including MP3, FLAC, MQA, and DSD. Its long battery life of 12.5 hours makes it great for extended listening sessions, while Bluetooth 5.0 with aptX and LDAC compatibility offers top-notch wireless audio streaming. The compact design, including a 4.7″ touchscreen, is well-suited for those who need a lightweight and easy-to-carry MP3 player for on-the-go use.

Who is this NOT for?

This product is not ideal for users who need location-based services, as it lacks GPS functionality. Additionally, users who require the highest audio performance for ultra-low latency or adaptive streaming may find it limiting, as it does not support aptX Adaptive or aptX Low Latency. Those in need of a device with better durability in harsh conditions may also find the lack of weather-sealing a drawback.

General info:

internal storage 32GB
Audio outputs 3.5 mm, 4.4 mm, USB-C
DAC name Cirrus Logic CS43198 x2
Audio file types MP3, FLAC, MQA, DXD, DSD, APE, ALAC, AIFF, WAV, WMA, OGG, AAC, DFF
Battery life 12.5 hours
release date January 2025
charge time 2 hours
has an external memory slot ✓
Signal-to-noise ratio (SNR) 130 dB
has wireless charging ✕
is weather-sealed (splashproof) ✕
battery power 2400 mAh
RAM 3GB
Chipset (SoC) name Qualcomm Snapdragon 680
Android version Android 13

The FiiO JM21 offers 32GB of internal storage with an external memory slot for additional capacity. It features a dual Cirrus Logic CS43198 DAC configuration for high-quality audio playback. The device supports a wide range of audio file types, including MP3, FLAC, MQA, DSD, and more, ensuring compatibility with various music formats. Battery life is up to 12.5 hours, and it takes around 2 hours to fully charge. For audio outputs, it includes 3.5 mm, 4.4 mm, and USB-C options, delivering versatile connection possibilities. With a 130 dB signal-to-noise ratio, it guarantees clear, detailed sound reproduction.

Design:

screen size 4.7"
resolution 750 x 1334 px
pixel density 326 ppi
weight 156 g
Display type LCD
has a touch screen ✓
volume 106.6988 cm³
width 68 mm
thickness 13 mm
height 120.7 mm

The FiiO JM21 has a compact design with a 4.7″ LCD touchscreen that offers a resolution of 750 x 1334 px and a pixel density of 326 ppi for clear visuals. Weighing just 156g, it has dimensions of 120.7 mm in height, 68 mm in width, and a thickness of 13 mm, making it lightweight and portable. With a volume of 106.7 cm³, it is easy to handle and fits comfortably in your hand, offering a seamless user experience.

Connectivity:

Bluetooth version 5
has aptX ✓
has LDAC ✓
has LDHC ✓
has aptX HD ✓
has aptX Adaptive ✕
has aptX Lossless ✕
has AAC ✓
has aptX Low Latency ✕
has AirPlay ✓
supports Wi-Fi ✓

The FiiO JM21 offers robust connectivity options, including Bluetooth 5.0 for wireless audio streaming. It supports multiple advanced audio codecs such as aptX, LDAC, and aptX HD, ensuring high-quality sound over Bluetooth. The device also supports AirPlay for seamless streaming and has Wi-Fi support for additional connectivity options. Notably, it does not support aptX Adaptive or aptX Low Latency for certain low-latency applications.

Miscellaneous:

has GPS ✕

The FiiO JM21 does not include GPS functionality, meaning it does not support location tracking or navigation features.

Final Verdict

The FiiO JM21 is a solid choice for users seeking a compact, high-quality MP3 player with versatile audio support, including aptX, LDAC, and a wide range of file formats. Its 12.5-hour battery life and expandable storage make it well-suited for extended listening sessions. However, the absence of GPS and some advanced audio features like aptX Adaptive may limit its appeal for those with more specialized needs. Overall, it's a great option for those who prioritize portability, sound quality, and ease of use.

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