7Hz Timeless 2 VS Letshuoer S12 Ultra
IEM Comparison: Expert & Community Scores Side-by-Side
7Hz Timeless 2 and Letshuoer S12 Ultra use 1Planar and 1Planar (14.8 mm) driver setups respectively. 7Hz Timeless 2 costs $229 while Letshuoer S12 Ultra costs $169. 7Hz Timeless 2 is $60 more expensive. Letshuoer S12 Ultra holds a slight 0.3-point edge in reviewer scores (7.2 vs 7.6). Letshuoer S12 Ultra has better treble with a 0.6-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 | 7Hz Timeless 2 | Letshuoer S12 Ultra |
|---|---|---|
| Bass | 8 | 7.8 |
| Mids | 7 | 6.8 |
| Treble | 7 | 7.6 |
| Details | 7.2 | 8.5 |
| Soundstage | 6 | 7.6 |
| Imaging | 7.2 | 7.9 |
| Dynamics | 6 | 7.4 |
| Tonality | 7 | 7.4 |
| Technicalities | 7.6 | 7.2 |
7Hz Timeless 2 Aggregated Review Score
Average Reviewer Scores
Average Reviewer Score:
7.2Generally Favorable
Letshuoer S12 Ultra Aggregated Review Score
Average Reviewer Scores
Average Reviewer Score:
7.6Strongly Favorable
Reviews Comparison
7Hz Timeless 2 reviewed by Jaytiss
7.3
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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7Hz Timeless 2 reviewed by Jays Audio
7
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
7Hz Timeless 2 reviewed by Web Search
2025-07-23
8.1
Reviewer Score
The 7Hz Timeless II updates its predecessor with a 14.5mm planar magnetic driver featuring a dual-sided silver alloy diaphragm and N52 magnets, offering improved responsiveness and reduced "planar timbre" compared to the original . Its standout feature is the four interchangeable nozzles, allowing tonal adjustments—though the bullet-shaped variants suffer from condensation issues and noticeably reduce treble clarity . Comfort is decent for medium-to-large ears, but the aluminum shells may challenge smaller anatomies, and isolation remains average despite a secure fit .
Tonally, the Timeless II leans neutral with a sub-bass lift, delivering fast, textured lows that avoid bleeding into the mids . Midrange clarity is strong but can edge into harshness with upper-mid-forward tracks, while treble extends well without excessive sibilance . Technically, it excels in imaging precision and soundstage width, though depth and height feel constrained next to hybrids like the Simgot ET142 .
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.
7Hz Timeless 2 (more reviews)
7Hz Timeless 2 reviewed by Z-Reviews
8.5
* score rescaled + normalized
7Hz Timeless 2 reviewed by Tim Tuned
6.5
Reviewer Score
7Hz Timeless 2 reviewed by Gizaudio Axel
6
Reviewer Score
Gizaudio Axel original ranking
Gizaudio Axel Youtube ChannelLetshuoer S12 Ultra (more reviews)
Letshuoer S12 Ultra reviewed by Head-Fi.org
8.7
* score rescaled + normalized
7Hz Timeless 2 Details
Driver Configuration: 1Planar
Tuning Type: Neutral with Bass Boost
Brand: 7Hz Top 7Hz IEMs
Price (Msrp): $229
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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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7Hz Timeless 2 User Review Score
Average User Scores
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Letshuoer S12 Ultra User Review Score
Average User Scores
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7Hz Timeless 2 Gaming Score
Gaming Score & Grade
- The gaming score is prioritizing technical capabilities of the IEM (Separation, Layering, Soundstage) and good value.
Gaming Score
7.4Gaming 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-7Hz Timeless 2 Scorings
Average Technical & Tuning Grades
Average Tunign Grade
A-- A mostly enjoyable signature keeps things listenable despite a handful of quirks. It handles most playlists without major complaints.
Average Technical Grade
A- Overall technical control is strong, presenting instruments with clarity and sensible staging. Textures are portrayed with satisfying clarity.
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.
7Hz Timeless 2 User Reviews
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