Letshuoer S12 Ultra

The reviewer finds the Letshuoer S12 Ultra to be a competent but largely redundant update to the original S12, with very similar tuning and performance. While it handles bass and vocals well and has a good fit, it doesn't offer a meaningful improvement over its predecessors, making it more of a collector's item for fans of the series.

The reviewer finds the Letshuoer S12 Ultra to be a neutral-warm IEM that lacks clarity and detail, with vocals that are slightly off and can get covered during busy choruses. While the bass is decent, the reviewer believes several cheaper alternatives sound better, making this a disappointing value at its price.

The reviewer finds the Letshuoer S12 Ultra to be the smoothest and most natural-sounding model in the S12 lineup, with a sub-bass boosted, dynamic all-rounder tuning. While it sacrifices some treble detail compared to the original S12 and S12 Pro, the trade-off is a more musical, less fatiguing listen that works well for pop, hip-hop, and EDM. The reviewer recommends it for those who prefer a smoother, more enjoyable sound over pure technical detail.

The reviewer finds the Letshuoer S12 Ultra to be a solid, well-rounded planar IEM that improves on the original S12 with better tuning and accessories, though it lacks visual flair and doesn't dramatically surpass its predecessors. He considers it a worthy swan song for the S12 family, offering good value with the included dongle and comfortable fit, but notes it faces stiff competition from newer brands.

The reviewer finds the Letshuoer S12 Ultra to be an excellent final entry in the S12 series, praising its wide, open, and airy soundstage, natural and organic tonality, and deep, punchy bass. He notes that it is non-fatiguing and highly resolving, and considers it on par with the Simgot ET42 as one of the best planar IEMs under $200, especially when paired with the included D01 dongle or more powerful sources.

The reviewer finds the Letshuoer S12 Ultra to be a well-tuned, smooth, and generally appealing planar IEM that sits between the S08 and S12 Pro, offering a safer, less bright sound that most people will prefer. However, for the reviewer personally, it lacks the transparency, dynamics, and open soundstage of the S12 2024, making it a good but not perfect choice for their tastes.