64 Audio U4S VS Symphonium Titan

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The 64 Audio U4s hits a compelling sweet spot: a 1DD+3BA hybrid around $1,100 that echoes the lush, bass-tilted character of the Nio while fixing key drawbacks. Packaging and accessories feel improved, with multiple tip options and the included M12 APEX module; APEX not only tailors bass but also relieves pressure for long sessions. Fit follows 64 Audio’s comfortable triangular shell; the vented DD asks for a slightly shallower insert than the all-BA models. Sonically, expect a sub-bass-oriented shelf and a treble profile that’s more lively and “zingy” than the Nio, with extra energy around the upper treble. The big caveat is 64 Audio’s muted 2–4 kHz region, which can set soprano vocals a step back on the stage.

Against the brand’s full-BA staples (think U12t/U6t), the U4s trades some pinpoint imaging and coherency for unmistakable DD slam and tactile “air pushing.” Extension at both ends is excellent, with upper-treble energy that makes micro-detail and reverb trails pop. It’s not the clean, conventional neutrality of something like a Monarch-style tuning; rather, it’s a deliberate, colored signature that delivers fun plus technical chops. Crucially, it fills a missing niche at its price and, in many respects, outperforms the pricier Nio, making the U4s a standout recommendation for listeners who want bass authority, sparkle, and engaging dynamics without going all-in on the flagship tier.

Youtube Video Summary

The 64 Audio U4s hits a compelling sweet spot: a 1DD+3BA hybrid around $1,100 that echoes the lush, bass-tilted character of the Nio while fixing key drawbacks. Packaging and accessories feel improved, with multiple tip options and the included M12 APEX module; APEX not only tailors bass but also relieves pressure for long sessions. Fit follows 64 Audio’s comfortable triangular shell; the vented DD asks for a slightly shallower insert than the all-BA models. Sonically, expect a sub-bass-oriented shelf and a treble profile that’s more lively and “zingy” than the Nio, with extra energy around the upper treble. The big caveat is 64 Audio’s muted 2–4 kHz region, which can set soprano vocals a step back on the stage.

Against the brand’s full-BA staples (think U12t/U6t), the U4s trades some pinpoint imaging and coherency for unmistakable DD slam and tactile “air pushing.” Extension at both ends is excellent, with upper-treble energy that makes micro-detail and reverb trails pop. It’s not the clean, conventional neutrality of something like a Monarch-style tuning; rather, it’s a deliberate, colored signature that delivers fun plus technical chops. Crucially, it fills a missing niche at its price and, in many respects, outperforms the pricier Nio, making the U4s a standout recommendation for listeners who want bass authority, sparkle, and engaging dynamics without going all-in on the flagship tier.

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Symphonium Titan delivers a bass-centric tuning that keeps its house in order. The mid-bass is tactile and textured with satisfying slam, while the sub-bass reaches deep, rumbly, and clean. Crucially, vocals remain clear and the treble is well-extended without harsh peaks; there’s a small 5–8 kHz rise that adds excitement and “snap,” yet overall control prevents bleed into the mids. The stage feels big and open, and the set avoids excessive warmth, making it a genuinely balanced bassy IEM.

There is a caveat: that 5–8 kHz lift can come off a bit sharp on forward-snare or energetic K/J-pop and hip-hop tracks, so the Titan shines best at mid volume rather than cranking it. Even so, it stays smoother than options like Maestro/Scarlet Minis, offering better extension and less fatigue while keeping the fun. Scaling is above average, and the overall presentation remains engaging and authoritative.

In comparisons, Titan reads as a direct upgrade to Monarch Minis (bigger stage, less fatiguing), more balanced than Scarlet Minis (which chase sheer slam), and a far better value play than Grand Maestro or EVOs for low-end lovers, thanks to cleaner bass and tamer upper mids. For warmer, smoother needs, DUNU’s take is fuller but not as rumble-clean or open. Under $1,000, Titan sets a new benchmark for bass-heads who still want clarity, air, and control.

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Symphonium Titan shows up with a big box, a blue theme, and a cable that feels too soft for a $1,000 set, plus a hefty metal case that could double as a tiny sarcophagus. The shell styling reads plain, almost like a stickered faceplate, and the accessory pile is fine-but-forgettable. The headline spec, though, is the eyebrow-raising 3Ω impedance—a choice that can stress amps, make cable impedance matter far more than it should, and generally feels needlessly risky when series/parallel options and crossover tweaks exist. Swapping cables doesn’t fundamentally rescue it; the blue stock wire is comfy but uninspiring in hand, and tip-rolling doesn’t unlock anything magical.

Sonically, Titan delivers a tidy, punchy kick drum and then coasts. It comes across as an all-BA tuning that’s overly polite: narrow soundstage, very neutral demeanor, vocals that sedate rather than seduce, and detail that never reaches “crystalline.” The sensation is like a go-kart with a limiter—foot down, waiting for excitement that never arrives—leaving the set short on engagement or a defining “thing” that justifies the price. Across amps—tube pre, solid-state, speaker-ish outputs—the character stays the same: controlled bass thump surrounded by music that refuses to wake up. In a world where a $21 budget set can spark a grin, Titan’s ultra-safe tuning and 3Ω quirk make it more “why?” than “wow.”