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Audio, video and related equipment. Determination of power consumption - Audio equipment Ingestion-build-48974 BS EN IEC 62056‑8‑4 applies1 Scope This part of IEC 62087 specifies the determination of the power consumption of audio equipment for consumer use. The various modes of operation which are relevant for measuring power consumption are defined. This standard is limited to audio equipment which can be connected to the mains. Audio equipment that includes a non removable, main battery is not covered by this standard. Audio equipment may include any number of auxiliary batteries.