7Hz Timeless 2 VS Letshuoer S12 Ultra

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Timeless II modernizes the original’s high-detail character into a more approachable package. The headline is four tuning nozzles (Gold Flower, Silver Flower, Gold Bullet, Silver Bullet) that meaningfully shift presence/upper mids and treble, letting listeners choose between a relaxed, natural profile and a forward, planar-typical clarity. Build quality, modular cable and accessories are polished, fit is comfortable, and the overall aim is to give newcomers an easy entry into planar detail without the harsher edges.

With the Silver Bullet, vocals move forward with crisp articulation and strong resolve; the bass shelf sits near Timeless AE levels with clean definition, while treble is consciously smoothed to reduce planar sharpness and sibilance. The Flower filters sound more relaxed and dynamic-driver-like but give up some nuance and air. Out of the box it is not as perfectly balanced as the S12 2024 reference, yet the nozzle/foam system provides real tuning flexibility: small foam changes can restore upper-treble air and add stage height, making Timeless II a versatile, top-tier option at its price.

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Final revision of the series brings a very coherent, slightly warmer presentation with treble pulled into safer territory and mids that feel a bit weightier. Ultra sits between the smoother S08 and the rawer S12 Pro, and it comes across a touch bassier than the graphs suggest. As a single-driver planar, it retains solid resolve and a natural, easy tonality that will suit most listeners, especially at the 169 price point.

Despite graphs looking similar to S12 2024, Ultra sounds smaller and flatter, with less transparency and dynamics. Soundstage is mainly left-right; height and depth are curtailed, so placement is not always in the right place on more spacious tracks. The smoother top end avoids harshness and makes long sessions comfortable, but the trade-off is reduced sparkle and air versus the 2024 tuning.

Versus budget planar standouts like KZ PRX, Ultra is a clear, smoother upgrade; versus S12 2024, it is the safer all-round pick but not as open or exciting. Dense mixes can nudge the bass toward a slight bloom and compress the center image. For most, this is the one S12 to buy; stage and transparency chasers may still prefer the 2024 version.

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LETSHUOER S12 Ultra wraps up the S12 line with a 14.8 mm planar driver and a familiar metal shell in gunmetal or mocha. The housing is vented, comfy for long sessions, and solidly built with a flat 2-pin interface that grips tips well. The stock package is practical: a soft case, a fair tip spread, a braided cable with swappable 4.4 mm termination, and even a plug-and-play USB-C DAC that performs capably for on-the-go use.

Sonically, this set aims for a mild V-shape with tasteful tweaks that elevate it over prior S12 iterations. There’s a touch more sub-bass than the S12 Pro and a smoother 10 kHz zone, reducing fatigue while keeping upper-treble reach for air. The presentation favors balance over sparkle: detailed without the brittle edge many planars flirt with, and notably non-fatiguing over longer listens. Technical chops are strong for the class—clean, clear, and “planar-fast”—though instrument separation can lag behind pricier hybrids, and the topmost “crispy” sheen is slightly restrained.

On graphs and in practice, S12 Ultra reads as a refined take on modern planars—more bass weight, tidier 4–6 kHz, and better treble behavior than its siblings. Listeners hypersensitive up top may still prefer something like the S15 for a softer treble contour, while those chasing maximal separation may lean to sets like AFUL Performer 7 (with a spicier treble). With the usual planar caveat about unit variance and fit, this edition comes through as the standout of the S12 series: a clean, engaging, and genuinely high-value recommendation under $500.

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7Hz Timeless 2 arrives as a polished successor to the original, delivering a smoother, more refined treble and a presentation that feels less “planar” in timbre. Its headline feature is the interchangeable nozzle system that meaningfully changes the sound—three distinct tunings rather than subtle tweaks—so fit and flavor are easier to dial in. Technicals remain solid for the class (layering, separation, staging), but the emphasis shifts from raw edge to easy, airy listenability; compared to brighter, snappier planars, this one trades a touch of bite for balance and comfort. Pairing with regular Sedna-style tips further smooths the top end without dulling it.

Midrange is handled with a calmer 2 kHz region, so vocals sound less forward and less shouty on energetic tracks. The silver nozzle tames that zone even more, appealing to listeners who prefer flatter upper-mids while adding a sense of openness and clarity. Bass is punchy, quick, and clean with good impact that avoids bleed; it won’t out-slam a strong dynamic-driver set, but the planar low-end here feels tight and versatile, fitting an all-rounder profile. If ultra-etched detail and hyper-tactile treble are the goal, some rivals push further; if the priority is smoothness without boredom, Timeless 2 hits the brief.

As a value play, sub-$100 options still undercut it, yet the combination of refinement + three nozzles makes Timeless 2 competitive at its price. Owners of recent planars may find it a side-grade in sheer technicals, but for anyone starting fresh—or seeking a safer, fuller tuning that scales reasonably—this is a confident recommendation. Use the smoothing tips and select the nozzle that fits the library, and it becomes a comfortable daily driver for most listeners.

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The Letshuoer S12 Ultra comes through as the smoothest tuning in the S12 family— a sub-bass boosted all-rounder with quick transients and satisfying rumble that makes pop, hip-hop, and EDM notably fun. Technical performance sits around earlier S12 variants, but treble detail is dialed back a touch versus the OG/Pro in exchange for a more natural timbre and less “planar-bright” edge. It’s the bassiest S12 to date, hitting with better texture, impact, and extension, while keeping imaging crisp enough to stay engaging rather than clinical.

Tuning tweaks tame the upper range: a cut past 1.5 kHz and an 8–15 kHz dip ease shout and sibilance, with air returning via a lift around 15 kHz. Vocals sit a bit pulled back and the treble is the least energetic of the series, which helps long-session comfort—though brighter, heavily produced tracks or songs with little low-end can still sound peaky if pushed. Best results come at ~65–70 dB; tip-roll toward clear or bass-supporting tips to smooth the top and reinforce the lows, while avoiding brightening tips that exaggerate energy.

Versus peers, S12 Ultra feels like a bassier, less shouty take on Supermix 4/Nova and a slightly more V-shaped, punchier alternative to Defiant. It’s not a value monster for sheer detail compared with cheaper planars (T10, F1 Pro, etc.), but the payoff is a presentation that’s more musical, smoother, and easier to live with. For listeners wanting added slam without losing the S12’s speed and airy sense of space, this version offers the most enjoyable balance in the lineup.

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Timeless 2 shows up with a bigger, round shell (carbon-fiber face, metal rim), a nice hard case, and an oddball-but-cool ribbon cable on MMCX that feels a bit stiff. The real headline is the swappable nozzles: tiny side-vent “pin” nozzles (stock), a “flower” top-vent nozzle, and a large side-vent set. Tip pack is a colorful grab bag (no foams), and care is needed because narrow bores can block those side vents. Power isn’t a problem—this set is very efficient and plays happily from a phone or desktop amps without turning harsh.

Sonically, the three nozzles behave like three different tunings. The stock tiny side-vents are wide, chill, and distant—easy listening with big space. Swap to the “flower” top-vent and everything snaps into focus: detail rockets up, staging comes closer, and transients clean up without tipping into sibilance; bass also tightens and gains punch. The big side-vent option brings more bass weight and a huge stage, trading a bit of hyper-detail for scale and fun. Tip rolling matters: wide-bore silicone (e.g., Dunu SS) or high-seal foams can make it a party in the head, while tight-bore foams can choke the vents and thin the sound.

With the right nozzle/tip combo, Timeless 2 goes from “good planar” to aggressively engaging: thunderous taiko hits, breathing and string texture on acoustic tracks, and club-ready energy on electronic. It feels like the most complete planar IEM here—big soundstage, real bass presence, and crisp clarity that invites louder listening. If pricing sits around the speculated $260–$320 range, this could muscle aside a lot of sets under $500–$600. Verdict: a bold, successful experiment that delivers three flavors of planar goodness, with the “flower” nozzle as the standout for clarity + slam.