Amendment 1 - Sound system equipment. Part 3: Amplifiers

This document represents an amendment issued to the technical specification concerning sound system equipment, specifically focusing on the third section dedicated to amplifiers. Originally published in the late 1980s, this supplement was released shortly thereafter to introduce necessary updates and modifications to the original requirements. The text establishes revised criteria for performance, safety, and testing procedures relevant to amplifier units used in professional and consumer audio environments. It addresses specific technical parameters that required adjustment to align with evolving industry practices and technological advancements existing at the time of its issuance. The content outlines detailed methodologies for assessing audio characteristics and ensures consistency in how manufacturers design and evaluate their products. By providing these additional provisions, the document serves to refine the core technical definitions found in the main standard without replacing the entire original text. It is structured to be integrated directly into the existing framework, offering clarity on particular aspects that needed refinement. This update maintains the rigorous standards expected for audio equipment while adapting to new insights and practical experiences gained since the initial publication.