Simgot Supermix 4 VS Letshuoer S12 Ultra
IEM Comparison: Expert & Community Scores Side-by-Side
Simgot Supermix 4 and Letshuoer S12 Ultra use 1DD+1BA+1Planar+1PZT and 1Planar (14.8 mm) driver setups respectively. Simgot Supermix 4 costs $150 while Letshuoer S12 Ultra costs $169. Letshuoer S12 Ultra is $19 more expensive. Letshuoer S12 Ultra holds a clear 0.8-point edge in reviewer scores (6.8 vs 7.6). Simgot Supermix 4 carries a user score of 6. Letshuoer S12 Ultra has significantly better treble with a 1.1-point edge, Letshuoer S12 Ultra has significantly better dynamics with a 1.4-point edge and Letshuoer S12 Ultra has significantly better soundstage with a 1.6-point edge.
Insights
| Metric | Simgot Supermix 4 | Letshuoer S12 Ultra |
|---|---|---|
| Bass | 8 | 7.8 |
| Mids | 7 | 6.8 |
| Treble | 6.5 | 7.6 |
| Details | 6.8 | 8.5 |
| Soundstage | 6 | 7.6 |
| Imaging | 6.8 | 7.9 |
| Dynamics | 6 | 7.4 |
| Tonality | 6.5 | 7.4 |
| Technicalities | 6.9 | 7.2 |
Simgot Supermix 4 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
Simgot Supermix 4 reviewed by Jays Audio
7
Reviewer Score
Jays Audio Youtube Channel
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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
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Simgot Supermix 4 reviewed by Jaytiss
7
Reviewer Score
Jaytiss Youtube Channel
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
Simgot Supermix 4 reviewed by Head-Fi.org
8.1
* score rescaled + normalized
Letshuoer S12 Ultra reviewed by Head-Fi.org
8.7
* score rescaled + normalized
Simgot Supermix 4 reviewed by Web Search
2025-07-08
6.4
Reviewer Score
The Simgot Supermix 4 packs a quadbrid driver configuration (1DD+1BA+1 Planar+1 PZT) into a comfortable resin shell. Its sound follows a U-shaped signature aligned with the Harman IE 2019 target, emphasizing sub-bass rumble and crisp upper-midrange clarity while keeping lower mids slightly recessed. The bass is deep and textured, though mid-bass punch can feel soft, and vocals sometimes edge into shoutiness at higher volumes.
Treble delivery is a standout, with the planar and PZT drivers offering snappy articulation and air without harsh sibilance. Technical performance is strong for the price, featuring a wide soundstage and precise imaging that excels in gaming scenarios. However, low impedance makes it source-sensitive, and accessories feel minimal with only one set of tips included.
While not class-leading in resolution, the Supermix 4 delivers cohesive tonality across its diverse drivers, making it a versatile choice for bass-forward genres and competitive gaming. Its slight warmth and holographic staging compensate for minor midrange thinning, offering solid value despite fierce competition.
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.
Simgot Supermix 4 (more reviews)
Simgot Supermix 4 reviewed by Tim Tuned
6.5
Reviewer Score
Tim Tuned Youtube Channel
Simgot Supermix 4 reviewed by
Fresh Reviews
6*
* The score of this reviewer influences only the Gaming
Score
Simgot Supermix 4 reviewed by Gizaudio Axel
5.5
Reviewer Score
Gizaudio Axel original ranking
Gizaudio Axel Youtube Channel
Simgot Supermix 4 Details
Driver Configuration: 1DD+1BA+1Planar+1PZT
Tuning Type: U-Shaped
Brand: Simgot Top Simgot IEMs
Price (Msrp): $149.99
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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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Simgot Supermix 4 User Review Score
Average User Scores
Average User Score:
Based on 1 user reviews
6Mixed to 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!
Simgot Supermix 4 Gaming Score
Gaming Score & Grade
- The gaming score is prioritizing technical capabilities of the IEM (Separation, Layering, Soundstage) and good value.
Gaming Score
7Gaming Grade
A-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-Simgot Supermix 4 Scorings
Average Technical & Tuning Grades
Average Tunign Grade
B+- It sounds pleasant overall, with some uneven spots that hint at room for refinement. Vocals remain pleasant despite the imperfections.
Average Technical Grade
B+- It offers a competent showing, maintaining cohesion on straightforward arrangements. Complex passages start to challenge it, but never derail the show.
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.
Simgot Supermix 4 User Reviews
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Pros
Responsiveness to EQCons
Typical harman IEM tuning - thin bodied and honky sounding.Buy Simgot Supermix 4 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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