FATfreq x Effect Audio: Quantum VS Fiio FX15

FATfreq x Effect Audio: Quantum and Fiio FX15 are in-ear monitors. FATfreq x Effect Audio: Quantum costs $770 while Fiio FX15 costs $750. FATfreq x Effect Audio: Quantum is $20 more expensive. FATfreq x Effect Audio: Quantum holds a clear 0.7-point edge in reviewer scores (7.8 vs 7.1). Fiio FX15 has significantly better treble with a 1-point edge, FATfreq x Effect Audio: Quantum has significantly better dynamics with a 3-point edge and FATfreq x Effect Audio: Quantum has better soundstage with a 0.5-point edge.

Jaytiss Score

FATfreq x Effect Audio: Quantum

7.8 /10

Jaytiss Score

Fiio FX15

7.1 /10

Score gap: 0.8

Metric	FATfreq x Effect Audio: Quantum	Fiio FX15
Mids	5	5
Treble	6	7
Soundstage	7	6.5
Dynamics	9	6
Tonality	6.8	6.1
Technicalities	6	7

Take these comparisons with a grain of salt—we don't have enough FATfreq x Effect Audio: Quantum and Fiio FX15 reviews saved yet to provide an unbiased result.

Jaytiss Reviews Comparison

FATfreq x Effect Audio: Quantum reviewed by

7.8 Reviewer Score

B+ Tuning

B Tech

I don't want to like, but I love.

Jaytiss original ranking

Jaytiss Youtube Channel

Mids: C+ Treble: B Dynamics: S Soundstage: A-

Fiio FX15 reviewed by

2025-08-09

7.1 Reviewer Score

B Tuning

A- Tech

Unique tuning, but the switch would be better in the mids or bass.

Jaytiss original ranking

Jaytiss Youtube Channel

Mids: C+ Treble: A- Dynamics: B Soundstage: B+

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Price: $749.99

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Price: $799

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Driver Configuration:

Tuning Type: V-Shaped

Top V-Shaped IEMs

Price (Msrp): $770

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Driver Configuration: 1DD+4BA+4EST

Tuning Type: V-Shaped

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Brand: FiiO Top FiiO IEMs

Price (Msrp): $750

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$749.99

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$799

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FATfreq x Effect Audio: Quantum Scorings

Average Tunign Grade

B+

Expect a friendly tonal balance that could use polish but remains inviting. Great for casual listening, less so for purists.

Average Technical Grade

It offers a competent showing, maintaining cohesion on straightforward arrangements. Complex passages start to challenge it, but never derail the show.

Mids C+

The mids are solid and dependable, though not especially remarkable. Vocals stay reasonably grounded in the mix.

Treble B

Treble is articulate and clean, adding excitement without harshness. It adds sparkle without harshness.

Dynamics S

This is reference-grade dynamic performance with breathtaking realism. It mirrors live-music intensity perfectly.

Soundstage A-

Excellent spatial presentation that is wide, deep, and tall with precise instrument placement. Width, depth, and height all feel expanded.

Fiio FX15 Scorings

Average Tunign Grade

Tonality is generally agreeable, though a few bumps remind you of its limits. Certain tracks spotlight its tonal quirks.

Average Technical Grade

A-

The presentation feels orderly, balancing workable detail retrieval with acceptable imaging cues. It keeps momentum without smearing transients.

Mids C+

The region sounds agreeable overall, delivering clarity without flashiness. Slight warmth keeps things easy-going.

Treble A-

Expect effortless extension and clarity that keep the top end sparkling yet smooth. Layering in upper registers is impressive.

Dynamics B

Dynamic expression is good, delivering solid impact and convincing contrast. Percussion lands with convincing weight.

Soundstage B+

You can map the ensemble with confidence thanks to solid spacing and coherent depth layering. Ambient effects feel believable.

FATfreq x Effect Audio: Quantum User Reviews

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