FATFreq Grand Maestro VS Fir Audio RN6
IEM Comparison: Expert & Community Scores Side-by-Side
FATFreq Grand Maestro and Fir Audio RN6 use 1DD+8BA+4EST and 1EST+1DD BA driver setups respectively. FATFreq Grand Maestro costs $3,334 while Fir Audio RN6 costs $3,300. FATFreq Grand Maestro is $34 more expensive. FATFreq Grand Maestro holds a decisive 1.2-point edge in reviewer scores (8.6 vs 7.4). Fir Audio RN6 has slightly better bass with a 0.3-point edge, FATFreq Grand Maestro has slightly better mids with a 0.3-point edge, FATFreq Grand Maestro has better treble with a 0.5-point edge, FATFreq Grand Maestro has better details with a 0.8-point edge and FATFreq Grand Maestro has significantly better imaging with a 1.3-point edge.
Insights
| Metric | FATFreq Grand Maestro | Fir Audio RN6 |
|---|---|---|
| Bass | 7.8 | 8 |
| Mids | 6.8 | 6.5 |
| Treble | 7.5 | 7 |
| Details | 6.8 | 6 |
| Soundstage | 9 | 7.4 |
| Imaging | 7.3 | 6 |
| Dynamics | 8.5 | 7.4 |
| Tonality | 8.2 | 7.2 |
| Technicalities | 8.1 | 7 |
FATFreq Grand Maestro Aggregated Review Score
Average Reviewer Scores
Average Reviewer Score:
8.6Excellent
Fir Audio RN6 Aggregated Review Score
Average Reviewer Scores
Average Reviewer Score:
7.4Generally Favorable
Reviews Comparison
FATFreq Grand Maestro reviewed by Nymz
6.5
Reviewer Score
Fir Audio RN6 reviewed by Nymz
6.2
Reviewer Score
FATFreq Grand Maestro (more reviews)
FATFreq Grand Maestro reviewed by Jays Audio
9.5
Reviewer Score
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
9.3
Reviewer Score
Jaytiss Youtube Channel
FATFreq Grand Maestro reviewed by Yifang
8.5
Reviewer Score
FATFreq Grand Maestro reviewed by Smirk Audio
7.7
Reviewer Score
FATFreq Grand Maestro reviewed by Head-Fi.org
9.5
* score rescaled + normalized
FATFreq Grand Maestro reviewed by Web Search
9
Reviewer Score
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.
Fir Audio RN6 (more reviews)
Fir Audio RN6 reviewed by Bad Guy Good Audio
8.5
Reviewer Score
Youtube Video Summary
Fir Audio RN6 brings a six-driver recipe and a limited-edition flair to the tour, dressed in satin black aluminum with a sapphire-glass faceplate and that signature grill exposing the Kinetic Bass dynamic. The stock cable behaves like a less-stiff Code 23, build feels solid and low-profile, and comfort clicks once the right tips are locked in. Priced at an eye-watering $3,300 and capped at 300 units, the RN6 aims squarely at “Stratos-Fi” territory.
On tuning, the RN6 plays it balanced: bass has punch and some rumble but is the tamest of its siblings, not delivering the full “feel-it” effect promised by Kinetic Bass—especially versus NE4 and the poster-child XE6. The midrange is clean with a touch of warmth, pushing vocals center stage while keeping instruments neatly spaced with plenty of air. Treble is energetic, sparkly, and crisp, lifting detail and openness, but may bite for treble-sensitive listeners given the lighter low-end masking. Technical chops are where it shines—imaging, layering, and a spherical sense of stage width/depth make parts easy to pinpoint without turning clinical; it’s revealing yet still musical. Versus Neon 4, this is the more detail-forward, vocal/treble-emphasized choice, though a little extra sub-bass weight would sweeten the deal. It’s trivially easy to drive. As a package, RN6 sits a step above Neon 4 on presentation and refinement, but the “gotta-have-it” factor isn’t unassailable at this price, with alternatives offering similar flavor at lower tiers. Still, for those craving a clean, airy, vocal-focused flagship with strong technicalities, this is a compelling—if costly—ticket.
Bad Guy Good Audio original ranking
Bad Guy Good Audio Youtube ChannelFATFreq Grand Maestro Details
Driver Configuration: 1DD+8BA+4EST
Tuning Type: Neutral, Basshead
Price (Msrp): $3,334
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Fir Audio RN6 Details
Driver Configuration: 1EST+1DD BA
Tuning Type: n/a
Price (Msrp): $3,300
Support our free service! Buying through our affiliate links costs you nothing extra:
FATFreq Grand Maestro User Review Score
Average User Scores
Average User Score: n/a
Based on 0 user reviews
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Fir Audio RN6 User Review Score
Average User Scores
Average User Score: n/a
Based on 0 user reviews
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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+Fir Audio RN6 Gaming Score
Gaming Score & Grade
- The gaming score is prioritizing technical capabilities of the IEM (Separation, Layering, Soundstage) and good value.
Gaming Score
5.5Gaming Grade
B-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.
Fir Audio RN6 Scorings
Average Technical & Tuning Grades
Average Tunign Grade
A-- It balances warmth and clarity well, showing only minor quirks along the way. Timbre feels believable with most instruments.
Average Technical Grade
A-- A competent technical showing keeps separation intact while delivering modest staging. It feels tidy even when recordings stack layers.
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