FATFreq Grand Maestro and Aroma Audio Fei Wan use 1DD+8BA+4EST and 2DD+10BA driver setups respectively. FATFreq Grand Maestro costs $3,334 while Aroma Audio Fei Wan costs $4,700. Aroma Audio Fei Wan is $1,366 more expensive. FATFreq Grand Maestro holds a slight 0.4-point edge in reviewer scores (8.6 vs 8.1). Aroma Audio Fei Wan has better bass with a 0.8-point edge, Aroma Audio Fei Wan has slightly better mids with a 0.4-point edge, FATFreq Grand Maestro has slightly better treble with a 0.3-point edge, FATFreq Grand Maestro has significantly better dynamics with a 1.3-point edge, FATFreq Grand Maestro has significantly better soundstage with a 2-point edge, Aroma Audio Fei Wan has significantly better details with a 1.8-point edge and Aroma Audio Fei Wan has significantly better imaging with a 1.3-point edge.
Insights
Metric | FATFreq Grand Maestro | Aroma Audio Fei Wan |
---|---|---|
Bass | 7.8 | 8.5 |
Mids | 6.8 | 7.3 |
Treble | 7.5 | 7.3 |
Details | 6.8 | 8.5 |
Soundstage | 9 | 7 |
Imaging | 7.3 | 8.5 |
Dynamics | 8.5 | 7.3 |
Tonality | 8.2 | 7.6 |
Technicalities | 8.1 | 8 |
FATFreq Grand Maestro Aggregated Review Score
Average Reviewer Scores
Average Reviewer Score:
8.6Excellent
Aroma Audio Fei Wan Aggregated Review Score
Average Reviewer Scores
Average Reviewer Score:
8.1Very Positive
Reviews Comparison
FATFreq Grand Maestro reviewed by Jaytiss
Jaytiss Youtube Channel
Aroma Audio Fei Wan reviewed by Jaytiss
Youtube Video Summary
Aroma Audio Fei Wan goes for broke with a dual-dynamic + 10BA hybrid and a sticker price around $4,688. The build is striking: a clear yellow shell with visible drivers and a glossy faceplate flecked with gold, though the shell runs large. The stock 2-pin cable is functional but a bit tangle-prone; the retro-styled unboxing and case feel premium. Minor quirks include occasional driver flex on insertion. Overall fit is comfortable despite the size, and the presentation screams boutique.
Sonically this IEM is all about texture, extension, and microdetail. Bass reaches deep with layered rumble rather than brute “slam,” mids are clean with slightly recessed vocals, and treble delivers air and sparkle without poking the 4–6 kHz zone. The graph shows healthy ear-gain and notable bass, but the magic is off-graph: resolution and overtones that feel world-class. Compared with benchmarks, Elysian Annihilator 2023 still wins on tone and vocal focus, while Fatfreq Grand Maestro and others share the “big-boy IEM” experimental flavor. Sets with shout or odd presence peaks (e.g., Dream XLS, E10/E12, Bonneville) don’t fare as well. EQ can nudge tone a touch “better,” but also trims some of Fei Wan’s special sauce—net maybe a 1–2% improvement.
Verdict: a special, statement-level IEM with second-to-none technicalities, deep textured bass, and elegant treble—tempered by a sky-high price and mids that could use more sparkle for vocal diehards. It slots just below Annihilator overall, earns a guarded recommendation, and absolutely warrants a demo before purchase. For value-minded listeners, options like Letshuoer Hype 10 capture a similar neutral-with-weight idea at a fraction of the cost, while many S–/A-tier picks remain safer bets for most.
Jaytiss Youtube Channel
FATFreq Grand Maestro reviewed by Smirk Audio
Aroma Audio Fei Wan reviewed by Smirk Audio
FATFreq Grand Maestro (more reviews)
FATFreq Grand Maestro reviewed by Jays Audio
Youtube Video Summary
FATFreq Grand Maestro aims squarely at a refined, sub-boosted tuning rather than a crude bass cannon. The bass quality shows real pedigree—excellent control, quick decay, and that clean, floor-shaking sub-bass rumble without smearing the mids. Treble reaches higher with better extension than typical basshead fare, and overall resolution, separation, and balance feel “endgame” in polish. For listeners who want muscular low-end that still plays nice with vocals and air, this tuning reads as a mature, high-performance take on “bass + hi-fi.”
But for pure basshead cravings, Grand Maestro doesn’t go overboard—it’s a bassy set, not a “basshead or bust” one. Compared with FATFreq’s own Scarlet Mini (or Maestro Mini), it brings less sheer quantity and “skull-rattle,” trading slam for finesse; next to ultra-dark hammers like HBB Hades, it’s far more balanced and controlled. The catch is diminishing returns: while the Grand Maestro is the most refined and technically capable among these bass-tilted options, those chasing maximum pound-for-pound slam may find better value in the Minis, and those wanting reckless low-end excess will still gravitate to sets like Hades. For most non-basshead audiophiles, though, Grand Maestro’s blend of sub-bass authority and top-end refinement hits the sweet spot.
Jays Audio Youtube Channel
FATFreq Grand Maestro reviewed by Nymz
FATFreq Grand Maestro reviewed by Head-Fi.org
FATFreq Grand Maestro reviewed by Web Search

The FATFreq Grand Maestro offers a highly adaptable sound signature through its NOAH modules and vocal switches, enabling four distinct tuning profiles. The black NOAH module emphasizes sub-bass "slam," while the blue variant provides tighter "rumble" control; combined with the vocal switch, these allow shifts from a bass-forward signature to a more mid-centric presentation. Bass is deep and authoritative but avoids midrange bleed, while the treble—handled by electrostatic drivers—delivers clarity without sibilance or fatigue.
Technically, it excels in imaging precision and creates an immersive, three-dimensional soundstage that positions instruments with remarkable specificity. However, its large shell size may challenge those with smaller ears, and it demands power-hungry sources—often requiring high-gain amplification to reach full potential. The deluxe package includes both NOAH modules and an upgraded cable, enhancing its tuning flexibility.
FATFreq Grand Maestro Details
Driver Configuration: 1DD+8BA+4EST
Tuning Type: Neutral, Basshead
Price (Msrp): $3,334
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Aroma Audio Fei Wan Details
Driver Configuration: 2DD+10BA
Tuning Type: U-Shaped
Brand: Aroma Audio Top Aroma Audio IEMs
Price (Msrp): $4,700
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FATFreq Grand Maestro User Review Score
Average User Scores
Average User Score: n/a
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Aroma Audio Fei Wan User Review Score
Average User Scores
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FATFreq Grand Maestro Gaming Score

Gaming Score & Grade
- The gaming score is prioritizing technical capabilities of the IEM (Separation, Layering, Soundstage) and good value.
Gaming Score
6.6Gaming Grade
B+Aroma Audio Fei Wan Gaming Score

Gaming Score & Grade
- The gaming score is prioritizing technical capabilities of the IEM (Separation, Layering, Soundstage) and good value.
Gaming Score
6.4Gaming Grade
BFATFreq Grand Maestro Scorings
Average Technical & Tuning Grades
Average Tunign Grade
A+- Tuning feels refined, blending frequencies with convincing realism and engagement. Transitions between registers feel effortless.
Average Technical Grade
A+- Layering is confident and precise, backed by imaging that locks elements firmly in place. Micro-details peek through without sounding forced.
Aroma Audio Fei Wan Scorings
Average Technical & Tuning Grades
Average Tunign Grade
A- Overall balance feels confident and refined, rewarding long listening sessions. A reliable all-rounder for everyday listening.
Average Technical Grade
A+- You get an articulate, polished performance with immersive stage depth and great control. There's a sense of polish across the whole spectrum.
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