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IEC 60581-7 Ed. 1.0 b:1986
High fidelity audio equipment and systems: Minimum performance requirements. Part 7: Loudspeakers
Applies to loudspeakers and loudspeaker systems provided with a baffle or enclosure. Also applies to systems intended to be assembled by the user (so-called 'loudspeaker kits') provided that the instructions for assembly meet certain requirements. Gives the minimum performance requirements and methods of measurement for loudspeakers and loudspeaker systems.
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International Electrotechnical Commission [iec]