Letshuoer S15

The reviewer, who generally dislikes planars, finds the Letshuoer S15 to be the most refined planar they've heard, describing it as a 'mini Supernova' with a neutral, smooth, and laid-back tuning that tames the typical planar peaks in the upper mids and treble while maintaining air and technical performance. They praise its natural timbre, tight bass, and excellent layering, though they note it lacks the excitement and vocal power of some competitors, making it a safe all-rounder rather than a specialist.

The reviewer praises the Letshuoer S15 planar IEMs as a flagship model with a warm, detailed sound, particularly excelling with female vocals and punchy bass. They find the build comfortable, the accessories generous, and recommend using an amp to get the most out of the sound, though they note it's not for those seeking a bright or reference-style tuning.

The reviewer finds the Letshuoer S15 to be a well-tuned and comfortable planar IEM with a balanced, natural sound and a unique soundstage presentation. While not the most expansive in depth, the height and separation are praised, and the overall tonality is considered very good for the price. The review is largely positive, with minor caveats about the cable and the need for direct comparisons.

The reviewer finds the Letshuoer S15 to be a smooth and refined planar IEM that addresses the brightness of earlier models, but criticizes its $330 price as too high for the performance level, and notes that the bass can be intrusive and the treble too recessed, requiring higher volume and careful source pairing. Overall, it's a competent but not exceptional set that may appeal more to those prioritizing smoothness over planar detail.