FiiO JM21From real comments

Verdict distilled from 45 mentions across 15 aspects in comments under product review videos.

Positive sentiment60%
PROS 60%
CONS 40%

Rank based on 45 mentions across 15 aspects

View the verdict as

Buy this if...

  • You want strong sound quality and power for around $180-199
  • You want Android streaming (Tidal/Qobuz/Apple Music) plus offline file playback
  • You want a compact, light DAP for travel or daily carry

What users love

Skip this if...

  • You need long battery life (10+ hours) without frequent charging
  • You need modular/replaceable battery or premium build materials
  • You want lag-free USB-DAC use for gaming or video

What users complain about

Compare in seconds

Based on user comments

Best choice
1Premium
FiiO M15
Useful 'delete currently playing song' featurePowerful driving power for demanding headphonesPremium packaging and build detailsHigh price relative to value for many usersSingle MicroSD slot limits storage flexibilityDiminishing returns versus cheaper alternatives
FiiO M15
Useful 'delete currently playing song' feature
Powerful driving power for demanding headphones
Premium packaging and build details
High price relative to value for many users
Single MicroSD slot limits storage flexibility
Diminishing returns versus cheaper alternatives
Best value
2Mid
FiiO M21
Cassette case designMusical, warm sound signatureDesktop mode with battery bypassCrackling/popping between tracksButton/port layout debateWeak or fiddly EQ
FiiO M21
Cassette case design
Musical, warm sound signature
Desktop mode with battery bypass
Crackling/popping between tracks
Button/port layout debate
Weak or fiddly EQ
3Mid
Cambridge Audio CXN v2
Detailed, high-quality soundBroad connectivity and service supportPairs well with Cambridge Audio ecosystemTreble can sound bright or harshApp usability issuesBluetooth and Chromecast reliability problems
Cambridge Audio CXN v2
Detailed, high-quality sound
Broad connectivity and service support
Pairs well with Cambridge Audio ecosystem
Treble can sound bright or harsh
App usability issues
Bluetooth and Chromecast reliability problems
4Premium
FiiO R9
Dynamic, lifelike soundAttractive, understated designImprovement over the R7High priceMissing features some wantedBuggy app and Bluetooth
FiiO R9
Dynamic, lifelike sound
Attractive, understated design
Improvement over the R7
High price
Missing features some wanted
Buggy app and Bluetooth
5Mid
Marantz NA6006
Positive purchase confidence from reviewsAnalogue-like sound signatureWorks well as a preamp with separate ampsUnanswered compatibility questionsFiddly menus and login entryFile format playback errors
Marantz NA6006
Positive purchase confidence from reviews
Analogue-like sound signature
Works well as a preamp with separate amps
Unanswered compatibility questions
Fiddly menus and login entry
File format playback errors
6Premium
Cambridge Audio Azur 851N
Excellent sound qualityFlexible digital connectivityWorks well as preamp with external power ampsUnclear Roon and DSD supportNo HDMI ARC inputNo headphone output
Cambridge Audio Azur 851N
Excellent sound quality
Flexible digital connectivity
Works well as preamp with external power amps
Unclear Roon and DSD support
No HDMI ARC input
No headphone output
7Mid
Onkyo NS-6170
Strong Sound QualityHi-Res and MQA PlaybackBroad Storage Format SupportConfusing Streaming App SetupSlightly Muted Treble vs CDThinner Sound Compared to CD Player
Onkyo NS-6170
Strong Sound Quality
Hi-Res and MQA Playback
Broad Storage Format Support
Confusing Streaming App Setup
Slightly Muted Treble vs CD
Thinner Sound Compared to CD Player
8
Cambridge Audio Minx Xi
Flexible Subwoofer IntegrationVersatile Digital ConnectivityInternet Connectivity Failures
Cambridge Audio Minx Xi
Flexible Subwoofer Integration
Versatile Digital Connectivity
Internet Connectivity Failures
9Premium
Sony NW-A105
Excellent sound qualityPhysical buttons and dedicated music focusPremium build and designPoor battery lifeBluetooth and headphone driving limitationsHigh price for the value
Sony NW-A105
Excellent sound quality
Physical buttons and dedicated music focus
Premium build and design
Poor battery life
Bluetooth and headphone driving limitations
High price for the value
10Premium
FiiO M23
Exceptional sound qualityPowerful desktop mode & transport useBuild quality and design touchesBuggy, laggy softwareBattery life and battery quality concernsTrack playback glitches
FiiO M23
Exceptional sound quality
Powerful desktop mode & transport use
Build quality and design touches
Buggy, laggy software
Battery life and battery quality concerns
Track playback glitches
You are here
11Mid
FiiO JM21
Excellent sound quality for the priceAndroid streaming versatilityGood value upgrade from older playersPoor battery lifeScreen and build quality issuesAudio stuttering bugs
FiiO JM21
Excellent sound quality for the price
Android streaming versatility
Good value upgrade from older players
Poor battery life
Screen and build quality issues
Audio stuttering bugs

Who wins on what

Ranked by what users actually praise

Overall Impression

Sound quality is the JM21's standout strength. Multiple commenters say the JM21 outperforms pricier or comparable devices, including the M23 and Hiby R4, citing stronger bass, more resolving treble, and an open, airy presentation from its CS DACs and pentaconn output stage. Filter options like Non-oversampling and features like Pure Music mode let users tailor tonal balance further, and pairings with IEMs and headphones are widely described as satisfying for the price.

Battery life is the most persistent frustration. Numerous users report only 4-6 hours of use despite FiiO's 12.5-hour claim, plus significant standby drain even with Wi-Fi off, with one losing 88% overnight. Some sold the device over this issue, while others found firmware updates 1.0.4 through 1.0.7 meaningfully reduced drain, and a newer 4GB RAM variant reportedly extends runtime further.

Build and software have minor but notable rough edges. Reviewers note the screen lacks Gorilla Glass and scratches easily, buttons and display are underwhelming, and a thin strip near the USB/jack ports looks fragile. Some experienced audio stuttering requiring restarts, failed firmware updates, and unresponsive FiiO support, while others recommend third-party launchers and player apps since the stock Fiio Music app disappointed several users.

Outdated / Not-accurate data?