This part of IEC 60268 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 that should be included in specifications of
amplifiers and the corresponding methods of measurement.
In general, the specified methods of measurement are those which are seen to be most
directly related to the characteristics. This does not exclude the use of other methods that
give equivalent results.
In general, the methods are based on the simplest measuring equipment which can provide
useful results. This does not exclude the use of more complex equipment that can give higher
accuracy and/or allow automatic measurement and recording of results.
Rated conditions and standard measuring conditions are specified in order to allow
measurements to be reliably repeated.