64 Audio Volur VS Unique Melody MEST Jet Black

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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.

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MEST Jet Black takes the series’ quirky tuning and doubles down on the excitement: a bright, incisive top end, tight bass with real sub-bass reach, and that trademark holographic imaging that spreads voices and instruments across a wide stage. The FR is unusual—think a rise starting near ~300 Hz with relaxed upper mids—so it doesn’t read neutral or warm; instead it plays lively and intense, sometimes sibilant without the right tips. Ceramic shells look killer but are heavy, the stock cable is a thin 4.4 mm affair that feels mismatched, and there’s pronounced driver flex that can be distracting, especially when lying on a pillow.

Tip choice is pivotal: narrow-bore options (e.g., AS400-style or Dunu Candy) tame treble while preserving space, whereas Final E smooths things but blunts the “special” imaging. Get the fit deep and stable and the set rewards with crisp separation, energetic treble sparkle, and punchy—if not chest-thumping—mid-bass. It’s an engaging specialist rather than an all-day cruiser, and the $1,700 tag means those ergonomics matter.

Against peers, Fiio’s FX17 comes off warmer and more balanced with nicer bass texture but less image “wow.” AüR Audio’s Prestige Limited hits harder down low and stays contrasty, yet can sound a touch smoothed in timbre. DUNU’s Glacier follows a bigger-bass, Harman-leaning path that’s smoother and more natural overall while conceding some of the MEST’s lateral stage trickery. Net: stunning look, standout imaging, significant caveats; a solid 3/5 for those chasing spectacle over softness.

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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.

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The MEST Jet Black oozes premium flair: a jet-black shell with gold nozzle and screws, slightly recessed 2-pin sockets, and jewelry-like fit and finish. The accessories are playful and practical—think a “mushroom” case with IEM booties—and the bundled Dreamer/Dreamy cable feels well-made, if a bit dry/papery in hand and oddly marked for L/R behind the ear hooks. Pricing hovers around $2,000 with the cable (less without), positioning this as a luxury set where build quality clearly pulls weight.

Sonically, the Jet Black leans neutral, safe, and clean. A tasteful dip around 4 kHz tamps down sibilance, yielding treble that’s well-mannered with good air and clarity, while mids stay tidy rather than punchy. Resolution is high, imaging is confident, note weight is convincing, and the overall presentation feels laid-back and inoffensive—great across genres and an excellent EQ canvas for those who like to tailor. The trade-off: it doesn’t try to wow with big dynamics or spice; it’s more about polished refinement than fireworks.

Comparisons paint the picture: AFUL Performer 7 offers lively treble at a far lower price and could be the smarter pick for excitement per dollar. Stardust tracks a similar FR but feels less premium; Dusks (≈$350) sound flatter and similarly agreeable yet look/feel budget by comparison. Against peers, Apostle pushes a bit more upper-mid energy and vocal presence, while Chronicle can come off more engaging. For listeners chasing a neutral, resolute, and impeccably built IEM that plays everything gracefully—and who value aesthetic luxury as much as sonics—the MEST Jet Black is a compelling, if costly, choice.