8518.29.40.00 - Without housing, having a frequency range of 300 Hz to 3.4 kHz with a diameter of not exceeding 50 mm, for telecommunication use

This HTS classification, 8518.29.40.00, specifically identifies loudspeakers that are designed for telecommunication use and possess particular physical characteristics. These loudspeakers are characterized by not being housed within an enclosure, operating within a frequency range of 300 Hz to 3.4 kHz, and having a diameter not exceeding 50 mm. The narrow frequency range is a key indicator of their intended application in voice transmission systems, such as those found in telephones or other communication devices.

Distinguishing this subcategory from its sibling, 8518.29.80.00 (Other), is crucial for accurate classification. While both fall under "Other loudspeakers, whether or not mounted in their enclosures," this specific code targets the telecommunication-oriented, unhoused units with defined frequency and size limitations. The sibling category would encompass other types of unhoused or mounted loudspeakers not meeting these precise criteria, such as those intended for broader audio applications or with different technical specifications.

As this classification is a leaf node, there are no further subcategories to introduce. Classification at this level relies heavily on the precise fulfillment of the described technical parameters: the absence of an enclosure, the specific frequency response tailored for voice communication, and the defined maximum diameter. Importers and exporters must ensure that the goods precisely match all these criteria to correctly apply this HTS code.