FATfreq x Effect Audio: Quantum VS LetShuoer EJ07

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

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FATfreq x Effect Audio: Quantum and LetShuoer EJ07 are in-ear monitors. FATfreq x Effect Audio: Quantum costs $770 while LetShuoer EJ07 costs $900. LetShuoer EJ07 is $130 more expensive. LetShuoer EJ07 holds a clear 0.8-point edge in reviewer scores (7 vs 7.7). FATfreq x Effect Audio: Quantum has better bass with a 0.5-point edge, LetShuoer EJ07 has significantly better mids with a 3-point edge, LetShuoer EJ07 has significantly better treble with a 1.5-point edge, LetShuoer EJ07 has significantly better soundstage with a 1-point edge, LetShuoer EJ07 has significantly better details with a 2-point edge and LetShuoer EJ07 has significantly better imaging with a 2-point edge.

Insights

Metric FATfreq x Effect Audio: Quantum LetShuoer EJ07
Bass 7.5 7
Mids 5 8
Treble 5 6.5
Details 6 8
Soundstage 6.5 7.5
Imaging 5.5 7.5
Dynamics 9 7.7
Tonality 7 8.5
Technicalities 7.5 7.9
Take these comparisons with a grain of salt—we don't have enough LetShuoer EJ07 reviews saved yet to provide an unbiased result.

FATfreq x Effect Audio: Quantum Aggregated Review Score

Average Reviewer Scores

Shuwa-T
Audio Amigo
Kois Archive Jaytiss Jays Audio Head-Fi.org

Average Reviewer Score:

7

Cautiously Favorable

LetShuoer EJ07 Aggregated Review Score

Average Reviewer Scores

Shuwa-T Head-Fi.org
Jays Audio Audionotions

Average Reviewer Score:

7.7

Strongly Favorable

Reviews Comparison

FATfreq x Effect Audio: Quantum reviewed by Jays Audio

Jays Audio 7 Reviewer Score
A- Tuning
S Tech
Bright and full sound, very detailed, sparkly, airy, tons of treble extenstion... but it gets fatiguing with the stock filters. Blue filter has the best balance but still doesn't scale too well. 300 mesh filter goes hard tho - check modded ranking at bottom.

Jays Audio original ranking

Jays Audio Youtube Channel

LetShuoer EJ07 reviewed by Jays Audio

Jays Audio 8.5 Reviewer Score
S+ Tuning
A+ Tech
TOTL mids. Most 3D and holographic staging yet. Imaging, separation, layering, and staging are all S level - only thing that's holding it back is the darker treble which can lead to softer notes vs, Diva, for example.The most immersive set for rock, alternative, ballads, and classical. An 07M that scales better with better staging. Great clarity and seperation. Treble is pushed back but still clear and evident in tracks (at higher volumes). Could use more low-end (but not an issue) and sharper note transients. Takes you on a journey. Needs to be listened to at high volume for the full effect.

Jays Audio original ranking

Jays Audio Youtube Channel

FATfreq x Effect Audio: Quantum reviewed by Shuwa-T

Shuwa-T 5.7 Reviewer Score
B- Tuning
B- Tech
I struggle with this, perhaps it was insertion depth but that unconventional iem shape should never have been greenlit Average bass, thin midrange, unbearably sibilant treble

Shuwa-T original ranking

Shuwa-T Website

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

LetShuoer EJ07 reviewed by Shuwa-T

Shuwa-T 7.4 Reviewer Score
A- Tuning
A Tech
Comment: My favourite of the EJ lineup. Vocal centric with great clarity and thick note weights in the midrange Bass may be too polite

Shuwa-T original ranking

Shuwa-T Website

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

FATfreq x Effect Audio: Quantum reviewed by Head-Fi.org

Head-Fi.org 7.5 * score rescaled + normalized
2 community members have rated the FATfreq x Effect Audio: Quantum at an average of 4.0/5 on Head-Fi. Overall sentiment: Very Positive.

URL to full Review

Head-Fi.org original ranking

LetShuoer EJ07 reviewed by Head-Fi.org

Head-Fi.org 7 * score rescaled + normalized
4 community members have rated the Letshuoer EJ07 at an average of 3.8/5 on Head-Fi. Overall sentiment: Strongly Favorable.

URL to full Review

Head-Fi.org original ranking

FATfreq x Effect Audio: Quantum (more reviews)

FATfreq x Effect Audio: Quantum reviewed by Kois Archive

Kois Archive 7.8 Reviewer Score
S- Tuning
S Tech
Rating: A+ | Value: ⭐ | Gaming: 🎮🎮🎮 | Comfort: 4 very technical. wide. well tuned planar grainy treble due to the air

Kois Archive original ranking

Kois Archive Youtube Channel

FATfreq x Effect Audio: Quantum reviewed by Jaytiss

Jaytiss 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-
YouTube video thumbnail

FATfreq x Effect Audio: Quantum reviewed by Audio Amigo

Audio Amigo 6 * score rescaled + normalized
An interesting sort of Science Project IEM. FatFreq tried to extract as much Sub-bass power and texture while making an airy, detailed planar that isn't fatiguing. They succeeded, and with the Super Stage NOAH modules, this is the most open and wide sounding single Planar I've ever heard. Wish it was cheaper and didn't come with the Ares S II cable.

Audio Amigo original ranking

Audio Amigo Youtube Channel
YouTube video thumbnail

LetShuoer EJ07 (more reviews)

LetShuoer EJ07 reviewed by Audionotions

Audionotions 8 Reviewer Score
Very engaging and very natural sounding. Decent technicalities. Instruments sound correct. Staging and imaging very good for an IEM. Very enjoyable. Leans dark and maybe a bit lacking in treble extension but also very easy to just enjoy the music which, at the end of the day, is what we even want from IEMs right?

Audionotions original ranking

Website (Audionotions)

FATfreq x Effect Audio: Quantum User Review Score

Average User Scores

Average User Score: n/a

Based on 0 user reviews

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LetShuoer EJ07 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!

FATfreq x Effect Audio: Quantum Gaming Score

Gaming Score & Grade

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

Gaming Score

6.8

Gaming Grade

B+

LetShuoer EJ07 Gaming Score

Gaming Score & Grade

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

Gaming Score

7

Gaming Grade

A-

FATfreq x Effect Audio: Quantum Scorings

Average Technical & Tuning Grades

Average Tunign Grade

A-
  • Tuning lands in a pleasing sweet spot with mostly coherent frequency integration. Tonality stays consistent from track to track.

Average Technical Grade

A
  • You get a controlled, composed performance, marrying decent clarity with a still-modest sense of space. A safe technical performer for the price bracket.
Bass A
Expect a commanding bass response that reaches deep without clouding the mix. There's both slam and nuance in equal measure.
Mids C+
The mids are solid and dependable, though not especially remarkable. Vocals stay reasonably grounded in the mix.
Treble C+
Highs come through with reasonable clarity while staying mostly smooth. Sibilance is mostly controlled.
Dynamics S
This is reference-grade dynamic performance with breathtaking realism. It mirrors live-music intensity perfectly.
Soundstage B+
A satisfying balance of width and depth yields a stage that feels organized and engaging. Imaging lines up with the intended mix.
Details B
Finer gestures snap into focus without sounding clinical or forced. Layering holds strong across genres.
Imaging B-
A stable phantom center appears, lending vocals a consistent anchor. It maintains a coherent phantom center.
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

LetShuoer EJ07 Scorings

Average Technical & Tuning Grades

Average Tunign Grade

S-
  • It offers a luxurious, natural presentation with spot-on balance across the spectrum. Vocals and instruments weave together seamlessly.

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-
It serves up confident rumble and texture while keeping the spectrum balanced. You can enjoy bass-heavy music without fatigue.
Mids A+
Midrange quality is superb, rich with resolving power and transparency. Micro-details leap out effortlessly.
Treble B+
Expect crisp, well-balanced treble that keeps shimmer intact. You hear reverbs decay naturally.
Soundstage A
Excellent spatial presentation that is wide, deep, and tall with precise instrument placement. Width, depth, and height all feel expanded.
Details A+
Inner textures glow vividly yet never feel etched or artificial. It borders on studio-monitor transparency.
Imaging A
Each element locks into a steady coordinate even as the mix grows dense. Imaging holds even during busy segments.
Gaming A-
Good fundamental spatial awareness for most gaming scenarios. Handles basic positioning well but may lack nuance in complex situations. Bad value-to-cost for gaming purpose - not recommended

FATfreq x Effect Audio: Quantum User Reviews

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LetShuoer EJ07 User Reviews

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