Audio Equipment Step-Down Transformer
18VA toroidal transformer for powering tube preamplifiers and small audio components, providing clean isolated 12V AC power. Classified under HTS 8504.31.40.35 for its low power rating below 40VA and audio-specific design with minimal electromagnetic interference.
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Alternative Classifications
This product could be classified differently depending on its characteristics or intended use.
If integral part of complete audio amplifier assembly
Microphone/audio frequency amplifiers and parts classified under 8518 when not separate transformers
If power handling exceeds 1kVA for professional audio racks
Higher power capacity transformers shift to different subheading regardless of VA under 40
If designed for measurement/instrumentation audio applications
Oscillators and test equipment transformers classified with measuring instruments
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Import Tips & Compliance
• Specify toroidal vs EI core type affecting EMI performance; include ground isolation diagrams; verify audio frequency response characteristics if questioned
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