Kiwi Ears Aether VS Letshuoer S12

IEM Comparison: Expert & Community Scores Side-by-Side

Kiwi Ears Aether and Letshuoer S12 are 1Planar in-ear monitors. Kiwi Ears Aether costs $170 while Letshuoer S12 costs $150. Kiwi Ears Aether is $20 more expensive. Kiwi Ears Aether holds a decisive 4.1-point edge in reviewer scores (7.9 vs 3.8). Letshuoer S12 carries a user score of 6.8. Kiwi Ears Aether has significantly better mids with a 2-point edge, Kiwi Ears Aether has significantly better treble with a 5-point edge, Kiwi Ears Aether has significantly better dynamics with a 5-point edge and Kiwi Ears Aether has significantly better soundstage with a 1.5-point edge.

Insights

Jaytiss Score
Kiwi Ears Aether
7.9 /10
Jaytiss Score
Letshuoer S12
3.8 /10
Score gap: 4.2
Metric Kiwi Ears Aether Letshuoer S12
Mids 7 5
Treble 7 2
Soundstage 7.5 6
Dynamics 6 1
Tonality 6.9 3.8
Technicalities 7 2
Take these comparisons with a grain of salt—we don't have enough Kiwi Ears Aether and Letshuoer S12 reviews saved yet to provide an unbiased result.

Jaytiss Reviews Comparison

Kiwi Ears Aether reviewed by

Jaytiss 7.9 Reviewer Score
B+ Tuning
A- Tech
Not for bassheads, but one of the best planars I've ever heard.
Youtube Video Summary

Kiwi Ears Aether arrives as a ~$170 planar with a classy, comfortable shell that seals well despite its larger size and visible venting. The accessories are familiar—typical Kiwi Ears case, okay tip selection—while the cable feels like a real upgrade: soft, pliable, and tidy with a solid 3.5 mm termination. Fit can be great, but smaller ears should note the chunkier housing.

Sonically, Aether leans neutral-bright with a clean midrange, airy treble, and standout micro-detail retrieval for the price. There’s adequate measured bass, yet the added brightness trims some perceived slam, so it’s not for bassheads. Compared with earlier Kiwi planars, it feels more tonally correct, carrying that planar crispness without the shout or glare that often trips sets up around the mid-treble.

In A/Bs, Aether trades blows with Aöso: the latter reads a touch better tuned, but Aether pulls ahead in technicalities—micro-nuances, textural cues, “whispers.” Melody is warmer but less accurate; S08 is darker and cheaper but less balanced; S12 variants push more 5–6 k energy; MP145 is impressive yet bulkier. Overall, Aether scores roughly an 8/10 with a clear note: choose it for a mid-focused, detailed presentation and excellent value in the planar field, skip it if the priority is big bass weight.

Mids: A- Treble: A- Dynamics: B Soundstage: A

Jaytiss original ranking

Jaytiss Youtube Channel
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Price: $169

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Letshuoer S12 reviewed by

Jaytiss 3.8 Reviewer Score
D+ Tuning
E+ Tech
I think the s12 is fine, the pro and z12 don't add too much value

Jaytiss original ranking

Jaytiss Youtube Channel
Mids: C+ Treble: E+ Dynamics: E- Soundstage: B
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Price: $149

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Kiwi Ears Aether Details

Driver Configuration: 1Planar

Tuning Type: Neutral with Bass Boost

Brand: Kiwi Ears Top Kiwi Ears IEMs

Price (Msrp): $169.99

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Letshuoer S12 Details

Kiwi Ears Aether Scorings

Average Technical & Tuning Grades

Average Tunign Grade

B+
  • A mostly enjoyable signature keeps things listenable despite a handful of quirks. It handles most playlists without major complaints.

Average Technical Grade

A-
  • You get a controlled, composed performance, marrying decent clarity with a still-modest sense of space. A safe technical performer for the price bracket.
Mids A-
The mid band shines with organic tone and finely rendered textures. Long sessions remain fatigue-free.
Treble A-
It provides outstanding treble finesse, balancing brightness and control gracefully. It's engaging yet remarkably controlled.
Dynamics B
Expect energetic dynamics that bring music to life without harshness. It injects enthusiasm into fast music.
Soundstage A
The stage stretches in every direction, carving out clear three-dimensional pockets for each player. Placement accuracy impresses from the start.

Letshuoer S12 Scorings

Average Technical & Tuning Grades

Average Tunign Grade

D+
  • It struggles with balance, producing a lumpy response that rarely sounds coherent. Genre hopping highlights glaring inconsistencies.

Average Technical Grade

E+
  • Instrument separation collapses instantly, burying nuances and leaving everything in a gray blur. Layered arrangements collapse into a messy haze.
Mids C+
It presents a stable midrange foundation suitable for everyday listening. Clarity is serviceable without standing out.
Treble E+
Expect a dark-tilted treble that keeps excitement in check. Sibilants are dull, but so is everything else.
Dynamics E-
Expect limp dynamics that rob music of its natural rises and falls. Swells in orchestral tracks vanish.
Soundstage B
Good soundstage with proper width and depth, placing instruments in clearly defined positions. Instruments sit in their own lanes.

Kiwi Ears Aether User Reviews

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Letshuoer S12 User Reviews

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wpzdm
6.8

Best Planar IEM I've heard

Pros
Very impressive tech at its price
Cons
A bit artificial

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