Symphonium Helios VS Softears Twilight

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Positioned as a $1,100 4BA set with a proprietary “sub-woofer” armature, Helios promises consistency via FLAT (Filtered Linear Attenuation Tuning). In practice, the claimed impedance immunity proves fickle: desktop gear can skew the treble and dynamics, and tube amps are a no-go. Performance clicks on the right solid-state portable (e.g., a Violectric unit), where the presentation opens up with striking clarity, tactile microdetail, and pinpoint imaging. The stage doesn’t just spread left–right; there’s convincing presence—sounds pop in and around the head with tidy placement. Low end is tight and clean rather than head-rattling; it accommodates bass, it doesn’t chase it.

Ergonomics dampen the honeymoon. The shell is big and oddly shaped, the stock cable has poor ear retention, and the included tips feel thick and overdamp the voicing. Tip rolling (e.g., Xelastec, foam-hybrids, or Dunu SS) helps restore balance and bass grip, but fit remains fussy. Once settled, Helios delivers a smooth, near-tame signature that’s detailed without harshness—more refinement than fireworks. Verdict: a highly capable, clear and composed monitor for source- and tip-savvy listeners; brilliant when the chain is right, but the overall package—from fit to amp matching—can be annoying enough to test patience.

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Symphonium Helios hits the kilobuck arena with a 4-BA flagship co-developed with Subtonic, priced around $1,100. The unboxing is minimal: a waterproof, aluminum “hockey-puck” case (cool but gritty threading), assorted tips, and a standard 0.78 mm cable without ear guides. The shell is surprisingly large—reportedly to house bigger capacitors and wider tubing for the desired treble extension—and the wide nozzle plus stick-out fit will be the biggest hurdle for many ears. Comfort varies; demoing first is wise.

Sonically, Helios tracks Harman-ish through the lower mids, then diverges for a more relaxed ear-gain and a showpiece treble. Bass is sub-bass focused with near-zero mid-bass, staying impeccably clean of the mids; for BA, it slams impressively—competitive with U12t—though a touch light on texture. Mids read lean/clean (200 Hz dip), while the top end is remarkably linear with huge air; with AZLA SednaEarfit tips it can verge on abrasive, but the included silicone tips smooth things out to a class-leading treble at this price. Technicals are excellent: incisive imaging (even occasional “backwards” cues), strong macro & micro-dynamics, and lively transients; ultimate resolving edges still nod to sets like Annihilator and U12t. Taken as a whole, Helios stands as a top-tier kilobuck pick on sound quality—its fit is the make-or-break.

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Softears Twilight presents as a compact, metal, cube-like single-DD with a surprisingly comfortable fit, small nozzle, and recessed 2-pin sockets; build feels solid and understated. The stock cable is tasteful and practical, featuring a 4.4 termination with a matching 4.4-to-3.5 adapter that fits the aesthetic. Overall execution gives premium vibes without flash, and the in-ear ergonomics are notably good despite the chunky silhouette.

Tonally, Twilight carries modest bass presence with a gentle rise through the lower mids, then blossoms into crispy upper-mids and airy treble. The result is world-class imaging and stage, vivid separation, and some of the most engaging vocals in its bracket; however, cymbals can skew a touch sharp and strings may sound glassy if a track leans hot. Listeners craving slam or extra bite may notice a lack of “snap,” but a light EQ shelf can wake up the low end nicely.

Against peers, RSV offers a bit more bass weight and a smoother mid transition, Noir is the more balanced all-rounder, and Monarch trades blows on technicalities while feeling more polite. Twilight’s charm is its engagement: punchy, airy, and uniquely “fantastical,” with sweeter upper registers and less shout than sets like Aurora. Priced around $930, it’s best viewed as a must-demo for vocal lovers and those tolerant of leaner bass—an A-class experience for the right tuning preference, and a tempting buy if found closer to mid-fi pricing.

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Understated presentation, premium execution. Softears Twilight arrives in a minimalist box with a gorgeous leather case, a stock cable terminated in 4.4 mm plus a 4.4→3.5 mm adapter, and a thoughtful IEM sleeve to keep shells from clacking. The shells themselves are matte-black and cleanly finished, signaling a higher-end single dynamic-driver design that positions Twilight as the “little brother” to Turii while aiming at a similar refinement tier.

On first listen, the tuning comes across as mostly neutral with a vocal-forward slant. Bass reaches deep and hits punchy—classic DD dynamics—though some may read quantity as slightly bass-light. Treble is nicely extended with a touch of air, helping the stage feel open, and there’s a satisfying sense of depth and clarity that elevates detail without harshness. Price sits near the kilobuck mark, but early impressions suggest the performance and execution make a strong case, earning Twilight a spot as the session’s second standout and a compelling target for extended A/Bs against established in-game favorites.