Audio amplifiers, AV receivers, soundbars, and home theatre systems were registered under IS 616 and must migrate to IS/IEC 62368-1:2023 by November 2028. This guide covers the specific safety considerations for high-power audio equipment.
Audio amplifiers have high power output — even a 100W per channel stereo amplifier draws significantly more than 100W from the mains at full power due to efficiency losses. A high-power AV receiver can draw 500W or more at full power. This puts many AV receivers firmly in PS3 territory under IS/IEC 62368-1:2023.
Speaker output terminals on amplifiers carry audio voltage — up to 30-40V peak on a 100W/8 ohm output. Under IS/IEC 62368-1:2023, these are evaluated as PS2 energy sources (capable of causing pain but not serious injury under normal conditions). The terminals must be designed to prevent accidental short circuits.
Amplifiers run hot — Class AB amplifiers particularly so, as they dissipate significant power as heat even at idle. The heatsink design must keep output transistors within safe junction temperatures during continuous full-power operation. Surface temperatures on accessible heatsinks and chassis must meet IS/IEC 62368-1:2023 limits.
IS/IEC 62368-1:2023 includes acoustic energy safety requirements. Amplifier systems must not produce sound pressure levels that could cause permanent hearing damage under single fault conditions — for example, if an amplifier oscillates at full power into connected speakers.
Vacuum tube (valve) amplifiers operate at high voltages — typically 300-450V DC on the plate supply. These are PS3 energy levels. Insulation between the high-voltage tube circuits and accessible surfaces requires particular attention. Tube amplifiers are a growing premium segment in India.
IS 616 → IS/IEC 62368-1:2023 by November 2028. High-power AV receivers need early migration planning due to PS3 documentation requirements. House of Testing handles IS 62368 audio equipment testing.