Kefine Quatio VS Letshuoer S12 Ultra
IEM Comparison: Expert & Community Scores Side-by-Side
Kefine Quatio and Letshuoer S12 Ultra use 2DD+2BA and 1Planar (14.8 mm) driver setups respectively. Kefine Quatio costs $130 while Letshuoer S12 Ultra costs $169. Letshuoer S12 Ultra is $39 more expensive. Letshuoer S12 Ultra holds a clear 0.8-point edge in reviewer scores (6.8 vs 7.6). Kefine Quatio carries a user score of 8. Letshuoer S12 Ultra has better bass with a 0.8-point edge, Letshuoer S12 Ultra has better mids with a 0.8-point edge, Letshuoer S12 Ultra has significantly better treble with a 1.6-point edge, Letshuoer S12 Ultra has slightly better dynamics with a 0.4-point edge and Letshuoer S12 Ultra has better soundstage with a 0.6-point edge.
Insights
| Metric | Kefine Quatio | Letshuoer S12 Ultra |
|---|---|---|
| Bass | 7 | 7.8 |
| Mids | 6 | 6.8 |
| Treble | 6 | 7.6 |
| Details | 6.8 | 8.5 |
| Soundstage | 7 | 7.6 |
| Imaging | 6.8 | 7.9 |
| Dynamics | 7 | 7.4 |
| Tonality | 6.8 | 7.4 |
| Technicalities | 6.5 | 7.2 |
Kefine Quatio Aggregated Review Score
Average Reviewer Scores
Average Reviewer Score:
6.8Cautiously Favorable
Letshuoer S12 Ultra Aggregated Review Score
Average Reviewer Scores
Average Reviewer Score:
7.6Strongly Favorable
Reviews Comparison
Kefine Quatio reviewed by Jaytiss
7
Reviewer Score
Jaytiss Youtube Channel
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Letshuoer S12 Ultra reviewed by Jaytiss
2025-10-05
8
Reviewer Score
Youtube Video Summary
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.
Jaytiss Youtube Channel
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Kefine Quatio reviewed by Jays Audio
6.5
Reviewer Score
Jays Audio Youtube Channel
Letshuoer S12 Ultra reviewed by Jays Audio
2025-10-09
6.5
Reviewer Score
Youtube Video Summary
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.
Jays Audio Youtube Channel
Kefine Quatio reviewed by Head-Fi.org
7.9
* score rescaled + normalized
Letshuoer S12 Ultra reviewed by Head-Fi.org
8.7
* score rescaled + normalized
Kefine Quatio reviewed by Web Search
8
Reviewer Score
The KEFINE Quatio impresses with its premium build quality and versatile tuning options. Its lightweight aluminum alloy shells offer both durability and comfort, while the included modular cable with 3.5mm/4.4mm terminations provides flexibility for various sources . The standout feature is the three interchangeable nozzles: gold for a bright, detailed signature, silver for balanced neutrality, and black for a warm, smooth presentation - allowing users to tailor the sound to their preferences .
Sonically, the hybrid 2DD+2BA configuration delivers punchy bass and textured mids across all tunings, with the gold nozzles particularly enhancing vocal clarity and treble energy . While bass enthusiasts might desire more impact, the overall coherence and natural timbre are exceptional for the price point. The technical performance shines through articulate imaging and a spacious soundstage, though some critical listeners may note slight treble roll-off on the black/silver nozzles .
At $129, the Quatio offers remarkable value with its triple-tuning system and comprehensive accessory package including multiple ear tips and a premium case . It stands as a compelling choice for those seeking adaptable sound signatures without compromising on build or technical prowess.
Letshuoer S12 Ultra reviewed by Web Search
2025-10-05
7.1
Reviewer Score
The Letshuoer S12 Ultra continues the brand’s planar lineage with a 14.8 mm planar-magnetic driver in a compact metal shell. Notable upgrades include a 392-core silver-plated cable with interchangeable 3.5/4.4 mm plugs and even a bundled DT01 Pro Type-C DAC cable in some packages, positioning it as a self-contained portable solution at an MSRP around $169.
Tonally, the Ultra aims for a lively U-shaped balance common to prior S12 variants—crisp upper-treble energy with solid bass presence—while early impressions from show-floor demos frame it as the most refined take yet. That aligns with the S12 family’s reputation for strong resolution and a brisk top-end; the original S12 was praised for technical performance albeit with a brighter tilt, context that helps set expectations for the Ultra’s direction.
As with many planars, the S12 line can benefit from competent source power to realize dynamics and control; community reviews note the Ultra responds well to suitable amplification. Staging remains more intimate than expansive compared to some hybrids, but imaging and micro-detail are competitive at the price, making the Ultra a pragmatic sub-$200 pick for listeners who value clarity and transient speed over warmth.
Kefine Quatio (more reviews)
Kefine Quatio reviewed by Gizaudio Axel
2025-07-31
6.5
Reviewer Score
Gizaudio Axel original ranking
Gizaudio Axel Youtube Channel
Kefine Quatio reviewed by
Fresh Reviews
2025-09-30
6*
* The score of this reviewer influences only the Gaming
Score
Kefine Quatio reviewed by Tim Tuned
2025-08-09
5
Reviewer Score
Tim Tuned Youtube Channel
Kefine Quatio Details
Driver Configuration: 2DD+2BA
Tuning Type: Neutral, Neutral with Bass Boost
Price (Msrp): $129.99
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Letshuoer S12 Ultra Details
Driver Configuration: 1Planar (14.8 mm)
Tuning Type: U-Shaped
Brand: Letshuoer Top Letshuoer IEMs
Price (Msrp): $169
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Kefine Quatio User Review Score
Average User Scores
Average User Score:
Based on 1 user reviews
8Very Positive
Letshuoer S12 Ultra User Review Score
Average User Scores
Average User Score: n/a
Based on 0 user reviews
No user reviews yet. Be the first one who writes a review!
Kefine Quatio Gaming Score
Gaming Score & Grade
- The gaming score is prioritizing technical capabilities of the IEM (Separation, Layering, Soundstage) and good value.
Gaming Score
6.8Gaming Grade
B+Letshuoer S12 Ultra Gaming Score
Gaming Score & Grade
- The gaming score is prioritizing technical capabilities of the IEM (Separation, Layering, Soundstage) and good value.
Gaming Score
7.2Gaming Grade
A-Kefine Quatio Scorings
Average Technical & Tuning Grades
Average Tunign Grade
B+- Tonality is generally agreeable, though a few bumps remind you of its limits. Certain tracks spotlight its tonal quirks.
Average Technical Grade
B+- An honest, middle-of-the-road performance preserves structure without chasing micro-detail. It's respectable for everyday listening sessions.
Letshuoer S12 Ultra Scorings
Average Technical & Tuning Grades
Average Tunign Grade
A-- It balances warmth and clarity well, showing only minor quirks along the way. Timbre feels believable with most instruments.
Average Technical Grade
A-- The presentation feels orderly, balancing workable detail retrieval with acceptable imaging cues. It keeps momentum without smearing transients.
Kefine Quatio User Reviews
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You need to be signed in to write your own reviewOutstanding value hybrid IEM offering refined musicality and premium feel at $129, competing above its price tier.
Pros
Premium CNC aluminum build, versatile tuning nozzles, and exceptional accessories including modular cable. Warm, lush sound with punchy bass and natural mids ideal for vocals.Cons
Treble lacks air/sparkle for some, mid-bass warmth occasionally blurs definition. Soundstage width is average despite good depth.Buy Kefine Quatio on Aliexpress
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Letshuoer S12 Ultra User Reviews
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Pros
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Cons
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