Describes sound system loudspeakers, treated as entirely passive elements. Loudspeakers with built in amplifiers are excluded. Covers conditions, test signals, acoustical environment, unwanted acoustical and electrical noise, positioning of loudspeaker and measuring microphone, measuring equipment, accuracy of acoustical measurement, mounting of loudspeakers, standard baffle, preconditioning, type description, marking of terminals and controls, reference plane, reference point and reference axis, impedance and derivative characteristics, input voltage, input electrical power, frequency characteristics, sound pressure under free field and half space free field conditions, response under free field and half space free field conditions, output power, directional characteristics and amplitude nonlinearity.

BS 5428-11(1977) : 1977

BS 5428-11:SUPP1(1981) : 1981

BS 6840-5(1995) : 1995 AMD 9409

HD 483.5 : 200S2 - Identical

IEC 60268-5 : 3.1 - Identical