7th Acoustics Supernova VS Fiio FX17

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Hand-built in Indonesia with customizable abalone faceplates, Supernova feels like a boutique step up in value: a handsome, slightly medium-large shell, stable fit, strong isolation, and a tasteful, beefy copper cable. The only nit: a smooth nozzle with no tip notch means soft tips can slip. Overall execution—build, comfort, and the personal order-to-chat experience—delivers a “next level” vibe uncommon around $750.

Tonally, this is a clean, body-intact neutral with a touch of sub-bass lift and a tasteful push in the lower treble. Midrange is the star—full, natural, and richly timbred without the hollow lower-mid dip of leaner targets. Treble is well-extended, linear, and textured, giving transients snap without tipping into sibilance. Technicals impress: tight bass attack, clear separation, precise imaging, and strong micro-contrast that keeps dense mixes like The Cure’s “Disintegration” organized and alive. Caveats are mild: listeners sensitive to lower-treble energy should note its presence, and the low end—while punchy—still reads as BA bass with less sub-bass “flutter” than a dynamic driver.

Against peers, Supernova blends the fuller midrange charm of Moondrop Blessing 2 with the technical grace of Moondrop S8, yet sounds more natural than either. Symphonium Meteor offers bigger bass and a lush stage but trails in separation and mid texture; S8 feels smoother with even stronger 3D imaging but less body. Taken together, Supernova’s tuning, texture, and boutique fit/finish make a compelling all-rounder—and an easy five-star recommendation, especially for those who value lifelike mids and crisp, controlled sparkle over maximal slam.

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The Fiio FX17 emerges as a worthy flagship and a significant improvement over its predecessor, the FA19. This tribrid IEM boasts a unique driver configuration of one dynamic driver, four balanced armatures, and a staggering eight electrostatic drivers, all housed within a solid, lightweight titanium shell. While its aesthetic is considered a bit plain, the build quality is excellent. The package is loaded with a massive assortment of accessories, including seven different styles of ear tips and a cable with a clever built-in DAC adapter for smartphones.

Sonically, the FX17 delivers a warm, powerful, and engaging sound signature. Its bass is a particular standout, described as meaty, well-textured, and highly engaging without bleeding into the mids. The overall tonality is natural yet contrasty, offering a dynamic and punchy listen. The treble provides excitement and definition, though it can be slightly aggressive or "crashy" for those with high sensitivity, making it far from a "safe" tuning.

In direct comparisons, the FX17 is deemed superior in every way to the FA19, which was criticized for its bloated bass and splashy treble. It trades blows with competitors like the Dunu Glacier and ThieAudio Monarch Mk IV, offering a denser, more tactile experience than the Monarch's airy presentation and a more natural vocal tonality than the Glacier's more exaggerated V-shape. Ultimately, the FX17 is declared not only Fiio's best IEM to date but a compelling and engaging option in the high-end market.

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Custom-built shells and faceplates make Supernova feel special from the start, and the ergonomics seal the deal: a light, durable shell, super comfortable fit and a supple, well-textured stock cable. The tonality stays open, clean and free of sibilance, with imaging that snaps into place both horizontally and vertically. Detail retrieval in busy scenes is immaculate, making it superb for long gaming sessions—not to farm K/D ratios, but to elevate the overall experience as in-game micro-details sparkle. Tip rolling works well (SpinFit, Divinus, Latex H70), though the included tips are decent; the clamshell case is nice, if a bit annoying to twist shut.

Versus peers, Supernova shows almost perfect tuning with exceedingly strong technicals and a touch of juicy, lush timbre. Against Night Oblivion Butastur, the overall tone and bass texture on Supernova are a hair better, while Butastur gets you 95–98% of the way for less and shines for classical and pop. Compared with Monarch Mk III, the FR curves are scarily close (within a couple dB), yet Supernova’s treble refinement and stage feel a tad more convincing, even if Monarch brings different technical strengths. Net takeaway: a holographic, genre-agnostic performer that’s easy to recommend; the only real caveat is the long wait time to get one, and the bass could use a touch more authority.

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Fiio FX17 packs a wild driver stack—8x EST plus 1x dynamic and 4x BA—and a price that hovers around $1,500–$1,700. The shells are large and a little heavy, yet comfortable with solid isolation; the matte-steel finish looks slick but is a fingerprint magnet. MMCX sockets sit in a blue-ringed collar, and the included cable is genuinely nice: chin-slider equipped with swappable 4.4 / 3.5 / USB-C ends. Packaging is classic Fiio with a generous spread of ear tips (including SpinFits). Overall fit and finish scream audio-jewelry, in both the good and the pricey senses.

Sonically, this is a very wide, “open” presentation with impactful bass and noticeable warmth—sometimes veering toward mud rather than cleanliness. Upper-mids energy is restrained, while the 8 kHz region pops, and treble air extends well; the net effect leans neutral / deadpan-neutral with a slightly warm tilt and not a ton of bass heft. The tonality mirrors Truthear Pure more than many top-end sets, which will delight listeners who crave that profile but leaves others wanting more sub-bass punch and less incisive 8k. Technicals—detail, slam, and stage—are strong, yet the value is debatable when alternatives like Fiio FA19 / FX19 (more bass, less 8k bite), Dunu Glacier (more sub-bass and fun without losing correctness), Softears RSV / RSV MK2 (similar upper-mids with calmer 8k), Aful Dawn X (less warmth, better air for the price), or NiceHCK Rockies (cleaner treble) exist for less. Recommended for those chasing Fiio’s neutral house with a grand soundstage; everyone else may want EQ (a gentle clean-up of warmth/8k) or to shop the cheaper powerhouses.

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7th Acoustic Supernova brings a 6BA setup at around $850, dressed in pretty shells but a bit bulgy for the fit. Packaging quirks and micro-print gripes aside, the included Versus Audio cable (permanent 4.4) looks flashy and feels premium. Tip rolling from Dunu SS to Render shifts the presentation, but the core signature stays smooth to a fault—vocals sit a touch further back, treble hints at a lift then fades with different tips, and only the occasional techno track shows bass that carries well. It’s the kind of tuning that’s impeccably polite yet tip-dependent and rarely grabs attention.

Across sources—from a warmer Alpha Pro chain to other amps—the Supernova keeps a straight face: competent, clean, and ultimately boring for the price. Against known yardsticks (neutral “glass-of-water” sets, bass-heavy options, or value champs like Kiwi’s Astrals), the Supernova doesn’t carve a clear identity; it’s smooth without the thrill. Final takeaway: lovely looks, nice cable, but the sound feels meh at this tier—barely meeting the bar where musical moments should pop. On the value meter, the cable helps, the tuning doesn’t; there’s been better—and for less.

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The FiiO FX17 is a mind-bending flagship IEM priced at $1,500, packing an absolutely hilarious 13-driver configuration per side: one dynamic for bass, four balanced armatures for midrange control, and a staggering eight electrostatic drivers for the highs. The sheer number of electrostats isn't a gimmick; FiiO explicitly states they're necessary to achieve sufficient sound pressure and avoid being mere "decoration," throwing serious shade at competitors. The result is nothing short of wild. Forget typical soundstage descriptions – the music doesn't feel like it's coming from two points in your ears or even from speakers in a room. Instead, it creates an entirely internalized, coherent performance happening inside your head, like the band is set up within your skull. It’s a cognitive living experience prioritizing placement and realism over simple frequency response graphs.

This psychoacoustic magic translates into pure, infectious enjoyment. Tracks feel aggressively present yet controlled, with kick drums hitting the back of your eyewall and intricate details like tap dancing percussively located behind your eyes. The separation and realism are phenomenal, making everything from the Beastie Boys to complex techno feel immediate and utterly engaging. While physically large with a fingerprint-prone mirrored finish and using the less-favored MMCX connectors, the FX17 is surprisingly comfortable and not overly heavy. Criticisms like the connector type are dismissed as irrelevant noise compared to the sonic achievement. Plugged into anything from a high-end stack to the included USB-C dongle DAC, the FX17 delivers its unique, immersive magic consistently.

The unboxing experience screams flagship, absolutely justifying the price tag visually. It arrives in a luxurious British Racing Green case with magnetic closure, featuring gold-accented packaging, a wooden storage plaque (unit 240 shown), a cleaning cloth, MMCX tool, ear wax brush, magnetic cable clip, and a mind-boggling 22 pairs of various eartips. Add in a very nice cable with interchangeable terminations (3.5mm & 4.4mm included, 2.5mm adapter not included) and the aforementioned USB-C dongle, and the package feels comprehensive and premium. Ultimately, the FX17 stands out dramatically in the crowded $1,500 IEM field. It’s declared worth every penny of $2,000, delivering a unique, transformative listening experience that prioritizes how the sound is presented over traditional audiophile checkboxes. It earns full, emphatic marks as FiiO's best audio reproduction product to date.

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Supernova’s calling card is its treble: extended, butter-smooth, and startlingly even. No peaks, no weird dips, no BA glare—just airy shimmer with spot-on decay that stays stable at any volume. It rivals the best under $1K and even brushes the Symphonium Helios (OG) for finesse, yet remains less bright and more relaxed. Despite being all-BA, there’s no BA timbre. Dynamics feel controlled rather than fiery—big chorus swings (think “Run Away With Me”) are rendered cohesively without harshness, trading adrenaline for refinement.

The low end is clean, tight, and well-separated—not a sub-bass sledgehammer. Sets with DDs like Hype 2, EJ07M, or Monarch dig deeper and rumble harder, but Supernova’s bass gives body without smearing. Vocals sit mid-forward but not shouty, a hair warm from mid-bass/1.5k lift; extension around ~3k could use a touch more presence for extra “head voice,” yet the overall presentation remains natural and unfatiguing and scales beautifully with volume. Versus Moondrop S8, Supernova trades a bit of the S8’s clinical separation for fuller mid-bass weight and more textured, even treble; the S8 keeps a leaner, clearer stage and more vocal gain.

Comparisons sharpen its profile: against EJ07 (OG/KL), EJ07 offers darker tonality and stronger sub-bass immersion, while Supernova is airier and smoother up top. ThieAudio Monarch series: Mk1 has snappier vocal clarity, Mk3 hits harder with bass texture/slam, but Supernova wins on treble quality and macro-smoothness. Neon Pro can feel more engaging at mid volumes with firmer low-end and crisper imaging, whereas Supernova shines when cranked, remaining composed and immersive. Net take: an “endgame”-leaning, balanced all-rounder for those wanting refinement over fireworks—genre-agnostic, not a treble-head blaster or bass cannon, and short on “special sauce” theatrics, yet consistently excellent where it counts. Availability is the real enemy; production scarcity makes it hard to snag.

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The FiiO FX17 packs a hybrid 13-driver configuration featuring one dynamic driver, four balanced armatures, and eight EST drivers, priced around $1,500. Unboxing reveals a generous accessory suite: a premium leather case with magnetic closure, an MMCX removal tool, cleaning brush, cleaning cloth, and a magnetic cable holder. The highlight is the included modular cable with 3.5mm and 4.4mm terminations plus a specialized USB-C dongle enabling parametric EQ and firmware updates. Buyers also receive a staggering 22 pairs of ear tips – including SpinFits, liquid silicone, foam, bass-enhancing, vocal-focused, balanced, and double-flanged options – neatly organized across two cases. The cable itself earns praise for being soft, tangle-free, well-behaved, and featuring a functional chin slider.

Built from chunky titanium shells, the FX17 feels premium but substantial. While weight distribution prevents ear fatigue for some, its large size may cause fit issues for those with smaller ears, making a demo advisable. The nozzle diameter is 6.1mm. Sonically, the FX17 delivers a powerful, mid-bass focused slam described as punchy and meaty, though sub-bass rumble takes a backseat. The mid-range is warm, lush, and slightly relaxed, offering surprising clarity and excellent detail retrieval without shoutiness. Treble stands out as smooth, highly detailed, and non-fatiguing, providing ample air and shimmer without sibilance. Technical performance is strong, with great detail and separation, but the true star is the exceptionally wide, immersive, and realistic soundstage, particularly noticeable in the upper mids and treble.

Compared to the FiiO FA19, the FX17 offers a significant upgrade in bass physicality, smoother treble refinement, and superior soundstage. It also surpasses the Unique Melody MEST MKIII CF in detail, separation, stage width, and bass weight/texture. Against the pricier Elysian Apostle, the FX17 is warmer and more relaxed; the Apostle boasts tighter bass, clearer vocals, and sparklier treble, while the FX17 counters with a wider stage. This IEM is strongly recommended for mid-bass lovers seeking physical slam, listeners desiring warm, lush, non-fatiguing mids with clarity, treble enthusiasts wanting detail without harshness, and soundstage aficionados. It's not ideal for those with small ears due to shell size, listeners prioritizing deep sub-bass rumble over mid-bass impact, or anyone seeking a neutral or bright tuning. The FX17 earns a four-star rating for its standout qualities.