CPV code 32552400 designates Audio-frequency signal conversion apparatus in the Common Procurement Vocabulary (CPV 2008), the EU classification used to describe the subject of public contracts.
32552400 sits under 32552000 (Electrical apparatus for line telephony or line telegraphy) and groups 3 more specific sub-codes. When classifying a tender, choose the narrowest code that still covers the full subject of the contract.