Digital reverberators
Digital reverberators for audio signal processing
HSN 8543 70 21 (Digital reverberators) is not covered by a Bureau of Indian Standards Quality Control Order and carries no Partner Government Agency clearance requirement at the tariff-line level. Import follows the standard customs procedure: Importer-Exporter Code (IEC), bill of entry, commercial invoice, packing list. Other electrical machines and apparatus within Chapter 85 — particularly those incorporating radio-frequency transmission or wireless functionality — may attract compliance under separate tariff lines within the same heading.
The absence of compliance at this tariff line does not extend to functionally adjacent apparatus: audio equipment with integrated wireless or Bluetooth capability, or signal-processing units classified elsewhere in Chapter 85, may attract mandatory certification. Re-classification on customs examination — for instance, if the reverberator is found to incorporate a wireless interface — triggers retrospective compliance, including detention pending the relevant approval. Verify the product's technical specification against the customs tariff before relying on the absence of compliance.