The 3X are, along with the 2X, the first universal-fit in-ear monitors (IEMs) made by Unique Melody, a brand that previously dealt exclusively in custom-moulded IEMs.
More than just a first for the company, though, they’re also a pretty rare sight in general for IEMs as they combine both the balanced armature drivers used by most IEMs with a dynamic driver. This should in theory give the ‘phones both accuracy at the top end but plenty of oomph down low too.
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