The Fiio JM21 Digital Audio Player (DAP) offers a compelling blend of compact design, user-friendly functionality, and surprisingly balanced audio performance. This review delves into the JM21's strengths and weaknesses, comparing it to other DAPs in its class, particularly the Hiby R4 and Hiby Digital M300. We'll explore its unboxing experience, physical design, software features, and most importantly, its sonic characteristics. From its sleek packaging and ergonomic build to its versatile connectivity options and responsive interface, we assess whether the JM21 lives up to the hype.This in-depth review examines the JM21's impressive Snapdragon 680 processor, Wi-Fi and Bluetooth connectivity, and various listening modes. We'll discuss the initial battery life concerns and how a firmware update addressed these issues. Ultimately, we evaluate the JM21’s overall performance and value, determining if its balanced sound signature and convenient portability make it a worthy addition to your music listening arsenal, and if it truly delivers a superior mobile listening experience.
Pros And Cons
- Compact and comfortable to hold
- Good case included (velcro closure)
- Balanced, natural sound
- Includes 3.5mm and 4.4mm jacks
- Fast OS
- Sufficient battery life (8-9 hours)
- Simple and easy to use
- Case is a bit loose
- No screen protector included
- Battery life was initially poor (before a firmware update)
Read more: EPZ P50 In-Ear Monitor Review: A Breakout Performer?
Unboxing and First Impressions
The Fiio JM21 arrived in a surprisingly sleek package, a definite upgrade from my previous DAP experiences. The included clear case is a nice touch, though it felt slightly loose. The packaging itself was simple but well-designed, containing the DAP, a USB-A to USB-C charging cable, and the standard documentation. Overall, the unboxing experience was pleasant and efficient.
The case, while a bit loose, is practical and uses a convenient velcro closure. This is a smart design choice, avoiding the potential damage from forceful button presses that I've encountered with other cases. The translucent nature of the case allows the stylish blue of the DAP to shine through.
Physical Design and Build Quality
The Fiio JM21's physical design is both compact and ergonomic. Its slightly elongated shape feels comfortable in the hand. The device features a 3.5mm jack, a 4.4mm balanced output, and a USB-C port, offering versatile connectivity options. The buttons are responsive and well-placed, making navigation intuitive and easy.
Compared to my Hiby R4 and Hiby Digital M300, the JM21 is longer and slightly wider. Despite its size difference, it still feels remarkably compact and lightweight. The build quality feels sturdy and premium, which is essential for a portable device that will likely endure frequent handling and travel.
Technical Specifications and Software
Under the hood, the Fiio JM21 packs a punch with its Snapdragon 680 processor. The device also includes Wi-Fi and Bluetooth connectivity, essential for seamless streaming and device pairing. The interface is smooth and responsive, handling various tasks without noticeable lag. The 2400mAh battery provides ample listening time.
The software offers various listening modes, including Android mode, pure music mode, and USB DAC mode. This versatility caters to diverse user preferences and listening setups. However, a notable omission is the lack of a pre-installed screen protector, a feature found in competing models.
Sound Quality and Performance
The Fiio JM21's sound signature is remarkably balanced and natural. It avoids excessive coloration in any frequency range, delivering a well-rounded listening experience. Compared to my Hiby Digital M300 (which leans towards vocals) and Hiby R4 (which emphasizes bass), the JM21 offers a more neutral presentation that elevates all frequencies harmoniously.
The JM21's sound is more refined than its predecessors. Vocals are clear and well-defined, without being overly forward. The bass is present and well-controlled, adding depth and warmth without overwhelming other elements. The treble is detailed and smooth, offering excellent clarity without harshness. This balanced approach makes the JM21 suitable for a variety of musical genres.
Battery Life and Overall Impression
Initial battery life was a concern, but after a firmware update (1.05), the battery performance significantly improved. I now get roughly 8-9 hours of continuous playback, which is quite sufficient for my daily use. The battery life is heavily influenced by usage, such as whether streaming is involved or if local files are played.
Considering its compact size, intuitive controls, balanced sound profile, and improved battery life, the Fiio JM21 DAP is a strong contender in the market. It excels in portability and simplicity, but doesn't skimp on sound quality. While it might lack certain advanced features found in high-end DAPs, the JM21 provides an excellent balance of functionality and convenience. This is my go-to DAP for mobile listening.
