FATFreq Grand Maestro and 64 Audio Volur use 1DD+8BA+4EST and 2DD+8BA driver setups respectively. FATFreq Grand Maestro costs $3,334 while 64 Audio Volur costs $2,499. FATFreq Grand Maestro is $835 more expensive. FATFreq Grand Maestro holds a slight 0.2-point edge in reviewer scores (8.6 vs 8.4). FATFreq Grand Maestro has better mids with a 0.8-point edge, FATFreq Grand Maestro has better treble with a 0.5-point edge, FATFreq Grand Maestro has significantly better dynamics with a 1.5-point edge and FATFreq Grand Maestro has significantly better soundstage with a 2-point edge.
Insights
Metric | FATFreq Grand Maestro | 64 Audio Volur |
---|---|---|
Bass | 7.8 | 8.4 |
Mids | 6.8 | 6 |
Treble | 7.5 | 7 |
Details | 6.8 | 8.4 |
Soundstage | 9 | 7 |
Imaging | 7.3 | 8.4 |
Dynamics | 8.5 | 7 |
Tonality | 8.2 | 6.8 |
Technicalities | 8.1 | 7 |
FATFreq Grand Maestro Aggregated Review Score
Average Reviewer Scores
Average Reviewer Score:
8.6Excellent
64 Audio Volur Aggregated Review Score
Average Reviewer Scores
Average Reviewer Score:
8.4Very Positive
Reviews Comparison
FATFreq Grand Maestro reviewed by Jaytiss
Jaytiss Youtube Channel
64 Audio Volur reviewed by Jaytiss
Youtube Video Summary
64 Audio Volür comes across as a tour-de-force of bass tech: dual true isobaric dynamic drivers deliver deep, textured rumble with a “speaker-in-the-room” feel, while the Tia BA adds pronounced upper-treble energy. Ergonomics are excellent—compact metal shells, smooth nozzles that take tips well, and a best-in-class top two-pin connection that makes cable swaps effortless. Build feels built-to-last and the purple faceplate looks classy, though a more varied aesthetic across 64 Audio’s lineup would be welcome.
The APEX modules change flavor more than fundamentals: M20 adds a touch more bass, M15 strikes the best balance, M12 runs leaner, and MX is very flat and generally skippable; running it empty is a hard no. On music, Volür shines with EDM/modern productions, projecting holographic low-end and vivid dynamics; in dense mixes with strong instrumentals and vocals, the midrange can feel overrun and less engaging. Versus peers: U4s tracks similarly in bass level (with different modules), Elysian Annihilator brings stronger 3 kHz vocal presence while Volür counters with superior bass texture, and Monarch MKIII sounds more overtly U-shaped with greater mid/upper energy.
As a package, this is a fantastic IEM—arguably a favorite from 64 Audio—yet not flawless. The price is steep, the APEX ecosystem feels like paid tuning switches, and there’s some treble peaking plus occasional vocal thinness; a simpler, cheaper, M12-style fixed tuning would be a dream. For listeners prioritizing hip-hop, rap, and modern genres, Volür can absolutely be endgame; for vocal-centric or classical libraries, it’s impressive but not definitive. Overall verdict: a five-star recommendation for those who can afford it, anchored by class-leading bass and exceptional build, with clear trade-offs noted.
Jaytiss Youtube Channel
Buy 64 Audio Volur on audio46
Ad
Price: $2,573
Buy 64 Audio Volur on audio46
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.
64 Audio Volur (more reviews)
64 Audio Volur reviewed by
Fresh Reviews
Youtube Video Summary
64 Audio’s Volür is described as a holographic, highly resolving IEM with unusually high bass quantity that still preserves separation, layering, and air between notes. In games, positional cues feel 3D with immaculate depth and verticality; footsteps are prominent without smearing the mix, and vocals remain transparent with accurate timbre. The upper range presents as clean and non-sibilant, though certain upper-mid effects (e.g., shield cells/light taps) could use a touch more presence. For music, the stage is wider with singers a bit farther out, and micro-details—breaths, mic proximity, subtle slurs—emerge easily, delivering a fun yet technical listen.
Hardware choices matter: the preferred module is the gray (then silver, gold, and lastly black, which can feel fatiguing). Tip rolling significantly alters the presentation; foam tips shift it the most, while alternatives like Snailfit/SpinFit change stage depth and comfort. The driver pack—dual dynamic drivers in a true isobaric low end, six BAs for mids, an extra BA up top, plus 64 Audio’s TIA—underpins the speed, texture, and punch that remain controlled even at elevated bass levels. The main gripe is the included 3.5 mm cable on a flagship at this price; a balanced 4.4 mm option in the box would better fit expectations.
Overall, Volür is framed as an S-tier “unicorn” for gaming and a top-shelf choice for music if a bass-boosted but impeccably separated signature is the goal. It’s expensive, but for those in this bracket, the combination of impact, imaging, and resolution makes it a compelling daily driver—powerfully engaging while staying precise across the range.
Fresh Reviews original ranking
Fresh Reviews Youtube Channel64 Audio Volur reviewed by Super* Review
Youtube Video Summary
64 Audio’s Volür brings a bold, U-shaped tuning powered by a 10-driver array (8 BA + 2 DD in an isobaric setup) at a premium $2,500 price. The headline is the bass: a meaty, wallopy low end with unusually tight, textured attack that hits hard yet stays controlled, preserving clarity through the mids. Upper mids sit a touch relaxed, while an upper-treble zing adds bite, separation, and a roomy stage. 64 Audio’s APEX modules (M10/M12/M15/M20) primarily shift bass quantity; counterintuitively, the set shines most with the M20, where elevated bass balances the treble sparkle.
Build and ergonomics mirror recent 64 Audio releases: medium-sized shells with a slightly long nozzle (comfortable overall but fit stability can be just okay), plus a decent if slightly kinky stock cable. Technically, imaging, separation, and stage feel contrast-rich and more convincing than many peers. Tone preferences will matter: reduce the bass with lighter modules and the treble can dominate; leave the bass up and the presentation becomes satisfyingly muscular without smearing. As a proposition, Volür suits bass enthusiasts who want quantity and quality in tandem, earning a solid 4/5 for delivering big low-end thrills with high-end technical finesse.
Super* Review original ranking
Super* Review Youtube ChannelFATFreq 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:
64 Audio Volur Details
Driver Configuration: 2DD+8BA
Tuning Type: Neutral
Brand: 64 Audio Top 64 Audio IEMs
Price (Msrp): $2,499
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!
64 Audio Volur 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+64 Audio Volur Gaming Score

Gaming Score & Grade
- The gaming score is prioritizing technical capabilities of the IEM (Separation, Layering, Soundstage) and good value.
Gaming Score
6.7Gaming 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.
64 Audio Volur Scorings
Average Technical & Tuning Grades
Average Tunign Grade
B+- It sounds pleasant overall, with some uneven spots that hint at room for refinement. Vocals remain pleasant despite the imperfections.
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 review64 Audio Volur 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