See Audio Kaguya VS Fir Audio M4

IEM Comparison: Expert & Community Scores Side-by-Side

Home Ranking Compare IEMs

See Audio Kaguya and Fir Audio M4 use 4BA+4EST and 1DD+3BA driver setups respectively. See Audio Kaguya costs $1,399 while Fir Audio M4 costs $1,900. Fir Audio M4 is $501 more expensive. See Audio Kaguya holds a decisive 1.5-point edge in reviewer scores (7.4 vs 6). See Audio Kaguya has significantly better bass with a 3-point edge, See Audio Kaguya has significantly better mids with a 1.5-point edge, See Audio Kaguya has significantly better treble with a 3-point edge, See Audio Kaguya has significantly better soundstage with a 1.5-point edge, See Audio Kaguya has significantly better details with a 3-point edge and See Audio Kaguya has significantly better imaging with a 1.5-point edge.

Insights

Metric See Audio Kaguya Fir Audio M4
Bass 7 4
Mids 7 5.5
Treble 7.5 4.5
Details 8 5
Soundstage 8.5 7
Imaging 8 6.5
Tonality 7.2 5.6
Technicalities 7.9 6.4
Take these comparisons with a grain of salt—we don't have enough See Audio Kaguya and Fir Audio M4 reviews saved yet to provide an unbiased result.

See Audio Kaguya Aggregated Review Score

Average Reviewer Scores

Crin
Shuwa-T
Web Search

Average Reviewer Score:

7.4

Generally Favorable

Fir Audio M4 Aggregated Review Score

Average Reviewer Scores

Shuwa-T
Crin

Average Reviewer Score:

6

Mixed

Reviews Comparison

See Audio Kaguya reviewed by Shuwa-T

Shuwa-T 7.7 Reviewer Score
A- Tuning
A+ Tech
Comment: Retuning fixed the wonky midrange. Clean sounding with massive soundstage Thinner lower-midrange

Shuwa-T original ranking

Shuwa-T Website

Bass: A- Mids: A- Treble: A Soundstage: S- Details: A+ Imaging: A+

Fir Audio M4 reviewed by Shuwa-T

Shuwa-T 5.4 Reviewer Score
C Tuning
B Tech
Comment: Warm and lush midrange. Soundstage is surprisingly wide, midrange focused tuning Note definition is strangely subpar despite treble boost

Shuwa-T original ranking

Shuwa-T Website

Bass: C- Mids: B- Treble: C Soundstage: A- Details: C+ Imaging: B+

See Audio Kaguya reviewed by Crin

Crin 6 Reviewer Score
B Tuning
B+ Tech
Somewhat mid-scooped, decent bass and treble extension though with underwhelming resolving ability.

Crin original ranking

Crin Youtube Channel

Fir Audio M4 reviewed by Crin

Crin 6.5 Reviewer Score
B+ Tuning
B+ Tech
Too similar to the M3 to be worth the price markup.

Crin original ranking

Crin Youtube Channel

See Audio Kaguya (more reviews)

See Audio Kaguya reviewed by Web Search

uses AI-Search to turn user, reddit and head-fi reviews into clear, concise summaries.
Web Search 8.6 Reviewer Score
A+ Tuning
S Tech

The See Audio Kaguya is a flagship hybrid built around 4BA+4EST per side in a three-way division, using Sonion drivers and a 6N OCC silver-plated Litz cable. The package targets a premium audience with a listed MSRP of $1,399.

Tonally, Kaguya leans neutral-bright: bass is tight and contained rather than heavy, mids are clean with a slight upper-mid lift for presence, and treble is extended yet smooth. Detail retrieval and micro-texture are emphasized, making cymbals, strings, and vocal air stand out without harshness.

Technical performance is a clear strength: imaging feels lifelike and layered, and the stage spreads wider than many IEMs while keeping an intimate, “in-room” feel. Listeners who prefer clarity and treble air over heavy slam will likely appreciate the balance; bass-heads may want more punch. Build, fit, and accessories align with the price tier.

See Audio Kaguya User Review Score

Average User Scores

Average User Score: n/a

Based on 0 user reviews

No user reviews yet. Be the first one who writes a review!

Fir Audio M4 User Review Score

Average User Scores

Average User Score: n/a

Based on 0 user reviews

No user reviews yet. Be the first one who writes a review!

See Audio Kaguya Gaming Score

Gaming Score & Grade

  • The gaming score is prioritizing technical capabilities of the IEM (Separation, Layering, Soundstage) and good value.

Gaming Score

6.7

Gaming Grade

B+

Fir Audio M4 Gaming Score

Gaming Score & Grade

  • The gaming score is prioritizing technical capabilities of the IEM (Separation, Layering, Soundstage) and good value.

Gaming Score

4.6

Gaming Grade

C

See Audio Kaguya Scorings

Average Technical & Tuning Grades

Average Tunign Grade

A-
  • A smooth, agreeable balance keeps the presentation engaging without obvious flaws. Only sensitive ears will nitpick the bumps.

Average Technical Grade

A
  • You get a well-rounded technical package that keeps separation, detail, and staging in harmony. It's a solid middle ground between fun and fidelity.
Bass A-
Bass is strong and well-defined, delivering slam with admirable control. Electronic drops hit with authority.
Mids A-
The mids sound lush and articulate, capturing emotion effortlessly. Strings and keys shimmer with realism.
Treble A
It provides outstanding treble finesse, balancing brightness and control gracefully. It's engaging yet remarkably controlled.
Soundstage S-
Immersive holography surrounds the listener, making the venue feel tangible and enveloping. It delivers a grand, cinematic presentation.
Details A+
Inner textures glow vividly yet never feel etched or artificial. It borders on studio-monitor transparency.
Imaging A+
Even dense mixes remain locked in place, reinforcing the illusion of physical performers. The stage remains stable regardless of complexity.
Gaming B+
Respectable environmental presentation favors atmosphere over precision. Detects obvious directional cues while conveying game world ambiance. Bad value-to-cost for gaming purpose - not recommended

Fir Audio M4 Scorings

Average Technical & Tuning Grades

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

B
  • Technical ability is serviceable, keeping basic detail intact across simpler tracks. It keeps up with acoustic tracks without much fuss.
Bass C-
Bass stays subdued, content to hover in the background. It keeps things tidy, yet unremarkable.
Mids B-
The region sounds agreeable overall, delivering clarity without flashiness. Slight warmth keeps things easy-going.
Treble C
The top end sounds acceptable but lacks the smoothness of higher tiers. Air is hinted at more than delivered.
Soundstage A-
Immersion steps up dramatically as width, depth, and height integrate into a cohesive hologram. Everything sounds naturally spaced.
Details C+
Decent detail retrieval that handles most textures while leaving some micro-information understated. Most textures come through cleanly.
Imaging B+
Good imaging with precise instrument placement and clear front/back localization. Positions snap into place convincingly.
Gaming C
Minimal environmental definition provides only general audio cues. Suitable for games where positioning isn't critical. Bad value-to-cost for gaming purpose - not recommended

See Audio Kaguya User Reviews

Example User Posted on ...
0.0

"This is an example review"

Pros
  • Example pro 1
  • Example pro 2
Cons
  • Example con 1
  • Example con 2
No User-Reviews Yet

Share your experience and build your personal ranking list.

You need to be signed in to write your own review

Fir Audio M4 User Reviews

Example User Posted on ...
0.0

"This is an example review"

Pros
  • Example pro 1
  • Example pro 2
Cons
  • Example con 1
  • Example con 2
No User-Reviews Yet

Share your experience and build your personal ranking list.

You need to be signed in to write your own review

Find your next IEM:

IEM Finder Quiz

new
Use this quiz and answer a few questions to get your individual IEM recommendation list
(1/3) How much are you willing to spend on the IEM?
(2/3) Which sound characteristics are particularly important to you?
(3/3) Which tuning do you prefer?
You can select multiple options.

Footer