An amplifier set combined with a radio tuner in a single housing is typically classified as a radio receiver or combined radio/amplifier apparatus rather than as a standalone amplifier set. The presence of a reception function generally shifts the classification to the reception apparatus heading, so the product's technical configuration should be reviewed carefully.

Importers should provide technical specifications confirming that the unit contains both preamplification and power amplification stages in a single enclosure, along with commercial invoices and product literature describing it as a complete system. This documentation helps distinguish the product from a bare power amplifier module, which would fall under a different subheading.