FATFreq Grand Maestro and Campfire Astrolith use 1DD+8BA+4EST and 2PLA driver setups respectively. FATFreq Grand Maestro costs $3,334 while Campfire Astrolith costs $2,200. FATFreq Grand Maestro is $1,134 more expensive. FATFreq Grand Maestro holds a slight 0.1-point edge in reviewer scores (8.6 vs 8.5). FATFreq Grand Maestro has better mids with a 0.8-point edge, FATFreq Grand Maestro has better treble with a 0.5-point edge, Campfire Astrolith has better dynamics with a 0.5-point edge and FATFreq Grand Maestro has significantly better soundstage with a 1-point edge.
Insights
Metric | FATFreq Grand Maestro | Campfire Astrolith |
---|---|---|
Bass | 7.8 | 8.5 |
Mids | 6.8 | 6 |
Treble | 7.5 | 7 |
Details | 6.8 | 8.5 |
Soundstage | 9 | 8 |
Imaging | 7.3 | 8.5 |
Dynamics | 8.5 | 9 |
Tonality | 8.2 | 7.5 |
Technicalities | 8.1 | 7 |
FATFreq Grand Maestro Aggregated Review Score
Average Reviewer Scores
Average Reviewer Score:
8.6Excellent
Campfire Astrolith Aggregated Review Score
Average Reviewer Scores
Average Reviewer Score:
8.5Excellent
Reviews Comparison
FATFreq Grand Maestro reviewed by Jaytiss
Jaytiss Youtube Channel
Campfire Astrolith reviewed by Jaytiss
Jaytiss 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 Yifang
FATFreq Grand Maestro reviewed by Smirk Audio
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
Support our free service! Buying through our affiliate links costs you nothing extra:
Campfire Astrolith Details
Driver Configuration: 2PLA
Tuning Type: n/a
Brand: Campfire Top Campfire IEMs
Price (Msrp): $2,200
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
No user reviews yet. Be the first one who writes a review!
Campfire Astrolith 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 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+Campfire Astrolith Gaming Score

Gaming Score & Grade
- The gaming score is prioritizing technical capabilities of the IEM (Separation, Layering, Soundstage) and good value.
Gaming Score
5.7Gaming 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.
Campfire Astrolith Scorings
Average Technical & Tuning Grades
Average Tunign Grade
A- You get a polished tonal profile that stays natural from bass through treble. Subtle tuning choices keep things engaging.
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 User Reviews
"This is an example review"
Pros
- Example pro 1
- Example pro 2
Cons
- Example con 1
- Example con 2
Share your experience and build your personal ranking list.
You need to be signed in to write your own reviewCampfire Astrolith User Reviews
"This is an example review"
Pros
- Example pro 1
- Example pro 2
Cons
- Example con 1
- Example con 2
Share your experience and build your personal ranking list.
You need to be signed in to write your own reviewFind your next IEM:
IEM Finder Quiz
newIEM Comparison Tool
newVS