音响系统设备.第3部分:放大器(GMT)

[中文适用范围]： IEC 60268 的这一部分适用于模拟放大器以及模拟/数字放大器的模拟部分，它们构成专业或家庭应用音响系统的一部分。它规定了放大器规格中应包含的特性以及相应的测量方法。 [外文原描述]： IEC 60268-3:2013 applies to analogue amplifiers, and the analogue parts of analogue/digital amplifiers, which form part of a sound system for professional or household applications. It specifies the characteristics which should be included in specifications of amplifiers and the corresponding methods of measurement. This fourth edition cancels and replaces the third edition published in 2000 and constitutes a technical revision. It includes the following technical changes: - rated condition of multi-channel amplifier is expanded; - arrangement for the D-class amplifier is added; - method of measurement for output power (distortion-limited) is expanded; - Annex B is newly added. This publication is to be read in conjunction with IEC 60268-1:1985 and IEC 60268-2:1987