Sound system equipment; part 15: preferred matching values for the interconnection of sound system components; amendment 2 to IEC 268-15:1987

This document represents the second amendment to a foundational standard concerning electroacoustics, specifically addressing measurement methods for sound systems. Published in the early 1990s by a prominent international organization dedicated to electrical and electronic standardization, this update introduces technical revisions aimed at refining existing procedures. The text supplements the original core specification by incorporating new data or clarifying measurement protocols without altering the fundamental structure of the primary document. It serves as an essential reference for engineers and technicians seeking to align their sound system assessments with updated industry practices. The content focuses on precise methodologies for evaluating acoustic performance, ensuring consistency and reliability across diverse applications. By providing these specific adjustments, the amendment helps maintain the relevance and accuracy of the measurement techniques over time. Users of this standard benefit from clarified guidelines that reflect technological advancements and accumulated experience within the field. This supplementary document is designed to be used in conjunction with the main specification, offering a targeted update to enhance technical precision.