Oriolus Traillii and FATFreq Grand Maestro use 8BA+4EST and 1DD+8BA+4EST driver setups respectively. Oriolus Traillii costs $6,000 while FATFreq Grand Maestro costs $3,334. Oriolus Traillii is $2,666 more expensive. FATFreq Grand Maestro holds a clear 0.6-point edge in reviewer scores (7.9 vs 8.6). FATFreq Grand Maestro has significantly better bass with a 1.1-point edge, Oriolus Traillii has significantly better mids with a 1.8-point edge, FATFreq Grand Maestro has significantly better dynamics with a 2.5-point edge and Oriolus Traillii has significantly better details with a 1.5-point edge.
Insights
Metric | Oriolus Traillii | FATFreq Grand Maestro |
---|---|---|
Bass | 6.7 | 7.8 |
Mids | 8.7 | 6.8 |
Treble | 7.3 | 7.5 |
Details | 8.3 | 6.8 |
Soundstage | 7.9 | 9 |
Imaging | 7.3 | 7.3 |
Dynamics | 6 | 8.5 |
Tonality | 7.8 | 8.2 |
Technicalities | 7.3 | 8.1 |
Oriolus Traillii Aggregated Review Score
Average Reviewer Scores
Average Reviewer Score:
7.9Strongly Favorable
FATFreq Grand Maestro Aggregated Review Score
Average Reviewer Scores
Average Reviewer Score:
8.6Excellent
Reviews Comparison
Oriolus Traillii reviewed by Smirk Audio
FATFreq Grand Maestro reviewed by Smirk Audio
Oriolus Traillii (more reviews)
Oriolus Traillii reviewed by Super* Review
Oriolus Traillii reviewed by Bad Guy Good Audio
Youtube Video Summary
It looks like the transcript content didn’t come through. I’ll still provide a concise, provisional summary in Bad Guy Good Audio–style based on well-known impressions of the Oriolus Traillii. If you paste the transcript, I’ll tailor it precisely to that video.Oriolus Traillii comes across as a top-tier technical monster with a tuning that favors clarity, stage, and separation over brute-force slam. The bass—being all BA—is clean, fast, and textured, with enough sub-bass presence to anchor the mix without muddying the mids. Vocals sit front-and-center with lifelike timbre and zero shout, while instruments carve out space with pinpoint imaging and an almost holographic stage. Treble rides that sweet line of extended and airy yet non-fatiguing, giving cymbals sparkle and micro-detail without sandpaper.
This set is about refinement and resolution rather than chest-thumping impact: bassheads chasing DD heft may want more physicality, but anyone prioritizing coherency, layering, and effortless detail retrieval will find it special. Pairing stays simple—low-noise, low-output-impedance sources keep the background black and the dynamics snappy. The elephant in the room is the price; value is subjective, but performance sits in the summit-fi conversation. For vocals, acoustic, orchestral, and live recordings, Traillii delivers the kind of “forget the gear” presentation that keeps the play button getting tapped again.
Bad Guy Good Audio original ranking
Bad Guy Good Audio Youtube ChannelOriolus Traillii reviewed by Crin
Oriolus Traillii reviewed by Precogvision
Precogvision Youtube Channel
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 Jaytiss
Jaytiss Youtube Channel
FATFreq Grand Maestro reviewed by Yifang
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.
Oriolus Traillii Details
Driver Configuration: 8BA+4EST
Tuning Type: Neutral with Bass Boost
Brand: Oriolus Top Oriolus IEMs
Price (Msrp): $6,000
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FATFreq Grand Maestro Details
Driver Configuration: 1DD+8BA+4EST
Tuning Type: Neutral, Basshead
Price (Msrp): $3,334
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Oriolus Traillii User Review Score
Average User Scores
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FATFreq Grand Maestro User Review Score
Average User Scores
Average User Score: n/a
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Oriolus Traillii Gaming Score

Gaming Score & Grade
- The gaming score is prioritizing technical capabilities of the IEM (Separation, Layering, Soundstage) and good value.
Gaming Score
6Gaming Grade
BFATFreq 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+Oriolus Traillii Scorings
Average Technical & Tuning Grades
Average Tunign Grade
A- The response is even and composed, lending itself to effortless genre hopping. Voices sit comfortably in the mix.
Average Technical Grade
A-- A competent technical showing keeps separation intact while delivering modest staging. It feels tidy even when recordings stack layers.
FATFreq 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.
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