FiiO FX15From real comments

Verdict distilled from 20 mentions across 9 aspects in comments under product review videos.

Positive sentiment39%
PROS 39%
CONS 61%

Rank based on 20 mentions across 9 aspects

View the verdict as

Buy this if...

  • You value airy, extended EST-driven treble detail
  • You want a premium-feeling package and build from FiiO
  • You're comparing against similarly priced tribrids like Monarch Mk2 or IE 600

What users love

Skip this if...

  • You're sensitive to bright or 'cursed' treble tuning
  • You expect strong bass without swapping tips
  • You think $750 is too much for FiiO's off-the-shelf driver approach

What users complain about

Compare in seconds

Based on user comments

Best choice
1Premium
Tanchjim Darling
Elegant, Premium DesignComfortable Final-Style WearExcellent ImagingPoor Value at Price PointHigh Price Relative to Sibling ModelFatiguing Treble Peak
Tanchjim Darling
Elegant, Premium Design
Comfortable Final-Style Wear
Excellent Imaging
Poor Value at Price Point
High Price Relative to Sibling Model
Fatiguing Treble Peak
2
Campfire Audio Alien Brain
Versatile TuningBalanced Overall SignatureFantastic Bass
Campfire Audio Alien Brain
Versatile Tuning
Balanced Overall Signature
Fantastic Bass
3Mid
FiiO FD3 Pro
Striking Design and BuildStrong Brand LoyaltyFlagship-Style Driver TechConnector Compatibility UnclearPossible Treble ImbalancePrice Uncertainty
FiiO FD3 Pro
Striking Design and Build
Strong Brand Loyalty
Flagship-Style Driver Tech
Connector Compatibility Unclear
Possible Treble Imbalance
Price Uncertainty
4Premium
Shure SE846
Rich, Detailed SoundExcellent for Live MusiciansLong-Term Durability and ConsistencyHigh Price Relative to CompetitionComfort and Fit IssuesDurability and Build Quality Concerns
Shure SE846
Rich, Detailed Sound
Excellent for Live Musicians
Long-Term Durability and Consistency
High Price Relative to Competition
Comfort and Fit Issues
Durability and Build Quality Concerns
5Premium
Moondrop Illumination
Attractive, lightweight designRefined HD650-like tonalityGood comfort and fitExcessive $800 priceUnderwhelming technical performance for priceCheap stock cable and case
Moondrop Illumination
Attractive, lightweight design
Refined HD650-like tonality
Good comfort and fit
Excessive $800 price
Underwhelming technical performance for price
Cheap stock cable and case
6Premium
Campfire Audio Astrolith
High Resolution and DetailRich, Balanced BassComfortable FitHigh PriceBoosted Bass and Harsh TrebleInconsistent or Dark Tonality
Campfire Audio Astrolith
High Resolution and Detail
Rich, Balanced Bass
Comfortable Fit
High Price
Boosted Bass and Harsh Treble
Inconsistent or Dark Tonality
7Premium
Shure Aonic 3
Detachable MMCX cableAdjustable, customizable fitFull-spectrum sound tuningInconsistent sound quality for the priceComfort limitation for side sleepingPrice value concerns
Shure Aonic 3
Detachable MMCX cable
Adjustable, customizable fit
Full-spectrum sound tuning
Inconsistent sound quality for the price
Comfort limitation for side sleeping
Price value concerns
8Mid
Moondrop KXXS
Strong overall sound qualityImproves with burn-inGood bass responseVery similar to cheaper StarfieldIsolation and fit concernsNot always a meaningful upgrade
Moondrop KXXS
Strong overall sound quality
Improves with burn-in
Good bass response
Very similar to cheaper Starfield
Isolation and fit concerns
Not always a meaningful upgrade
Best value
9Budget
FiiO F1
Excellent value for moneyPositive sound quality impressionsSecure, stay-in fitPrice perceived as slightly high by some
FiiO F1
Excellent value for money
Positive sound quality impressions
Secure, stay-in fit
Price perceived as slightly high by some
10Premium
Tanchjim Soda
Eye-catching translucent designDetailed, crisp treble presentationGenerous accessory packageHigh $300 price point questionedCable quality complaintsOverly bright tuning for some listeners
Tanchjim Soda
Eye-catching translucent design
Detailed, crisp treble presentation
Generous accessory package
High $300 price point questioned
Cable quality complaints
Overly bright tuning for some listeners
You are here
31Premium
FiiO FX15
Notable technical ambition as first tribridPremium packaging and materialsStrong pairing with FiiO sourcesHigh price relative to hardwarePolarizing, possibly harsh trebleThin or inaccurate bass with stock tips
FiiO FX15
Notable technical ambition as first tribrid
Premium packaging and materials
Strong pairing with FiiO sources
High price relative to hardware
Polarizing, possibly harsh treble
Thin or inaccurate bass with stock tips

Who wins on what

Ranked by what users actually praise

Overall Impression

The EST-driven treble is the FX15's most divisive trait. Multiple commenters focus heavily on the electrostatic tweeters, with some loving the sense of air and detail they bring compared to other EST-equipped IEMs, while others find the treble extension inferior to 64 Audio's TIA drivers or describe the upper frequencies as 'cursed' and questionable at this price point. One listener notes the ESTs specifically affect 15k and above, and disabling them removes that entire layer, leaving a more V-shaped, bass-and-treble-boosted signature reminiscent of the OH10.

Bass performance depends heavily on tip choice and listener expectations. Some reviewers wanted more bass to elevate the overall profile, finding low-frequency instruments like kick drum and bass guitar comparatively thin or inaccurate versus rivals like the Monarch Mk2. Others push back, blaming thin stock tips for poor bass seal and suggesting swapping to regular tips solves the issue, pointing to a similar fix working on FiiO's JD7. The EST on/off switch further complicates things, as turning ESTs off to listen loud reportedly guts the intended tuning.

Price and build quality spark the most polarized reactions. At $750, several commenters feel FiiO is overreaching for hardware they see as off-the-shelf and Chinese-made, unfavorably comparing it to options like the Final B1 or Sony XBA-Z5, while others simply say they won't buy FiiO IEMs due to perceived overpricing. Conversely, others praise the luxurious packaging and possible genuine leather touches, and many long-time FiiO fans are eager to compare it against the FH7 and FH9 rather than dismiss it outright.

Outdated / Not-accurate data?