The ability to respond adequately to high power, especially (of a loudspeaker) the ability to respond to high signal power without undue distortion; frequently attributive.
Origin
1920s; earliest use found in The Times.
Definition of power handling in US English:
power handling
noun
The ability to respond adequately to high power, especially (of a loudspeaker) the ability to respond to high signal power without undue distortion; frequently attributive.