Oriolus Traillii Japan (JP) version [pre order]

The reviewer praises the elevated, predominantly sub-bass-focused shelf for being energetic and unusually convincing for balanced-armature bass. It has enough mid-bass support to work especially well with rock and metal, without any reported bleed or loss of control.

Upper mids sit below the Harman target, avoiding the shoutiness the reviewer hears in more aggressively pinna-gain-focused tunings. Vocals are called class-leading and the overall timbre is described as highly natural, with none of the plasticky character sometimes associated with BA designs.

A carefully judged lower-treble dip is said to balance the subsequent air-region energy rather than making the presentation dull. The result is airy and open sounding, though the review provides less specific detail on treble texture and extension than it does on the midrange and spatial presentation.

Resolution is described as supreme, yet detail is presented naturally instead of being pushed aggressively forward. The reviewer specifically values its ability to remain musical and holistic while revealing fine information.

The spacious presentation is a major highlight, with unusually large gaps around instruments and a transparent, open effect. The reviewer hears an uncommon sense of out-of-head imaging and boundless space for an IEM, although the fundamental image shape is still described as a three-blob presentation.

Speed and dynamics are considered impressive for a BA-based design, giving rock and metal convincing energy. The reviewer also calls the combination of technical ability and tonality notably balanced, supporting a cohesive rather than disjointed presentation.

Using double-flange tips, the reviewer reports a good seal and says this also brings up the bass response. This indicates that tip choice materially affects the result, while the review does not provide broader evidence about fit security across listeners or movement.

Comfort receives emphatic praise from a reviewer who generally does not enjoy wearing IEMs. They describe the fit as very agreeable and say they could keep the set in for the entire review.

The review does not directly assess passive isolation in noisy environments. A successful double-flange seal may help attenuation, but no specific real-world isolation performance is reported.

The review provides no meaningful comments on shell construction, cable quality, connector reliability, included case or tip assortment. Long-term durability and accessory usefulness are therefore not established.

At the stated $6,600 price, the reviewer calls it the best IEM they have heard and gives it their highest recommendation. They did not personally purchase it at that price and note that used examples around $3,000 to $4,000 are available, so the praise is strong but not an unqualified claim that the new retail price is a bargain.