Generally yes — a grille alone does not constitute an enclosure. The critical distinction is whether the driver is housed in a cabinet or box that forms an acoustic chamber. A driver with only a protective grille or frame would typically remain classified as an unmounted loudspeaker, but edge cases should be confirmed with a licensed customs broker.

Replacement drivers and new OEM drivers fall under the same SITC heading; the end-use purpose does not change the classification. However, if the drivers are imported as declared parts of a specific apparatus, they may alternatively be classifiable as parts under a different HTS subheading, so the commercial invoice description and intended use should be clearly documented.