Apparatus for measuring a plurality of loudspeakers arranged at different positions, comprising: a test signal generator for generating a test signal for a loudspeaker; a microphone device being configured for receiving a plurality of different sound signals in response to one or more loudspeaker signals emitted by a loudspeaker of the plurality of loudspeakers in response to the test signal; a controller for controlling emissions of the loudspeaker signals by the plurality of loudspeakers and for handling the plurality of different sound signals so that a set of sound signals recorded by the microphone device is associated with each loudspeaker of the plurality of loudspeakers in response to the test signal; and an evaluator for evaluating the set of sound signals for each loudspeaker to determine at least one loudspeaker characteristic for each loudspeaker and for indicating a loudspeaker state using the at least one loudspeaker characteristic for the loudspeaker, wherein the microphone device comprises a microphone array comprising three pairs of microphones arranged on three spatial axes; wherein the evaluator is configured for deriving an omnidirectional pressure signal by using the signals received by the three pairs or by using a further microphone arranged at a point in which the three spatial axes intersect each other, calculating a distance between the microphone array and a loudspeaker based on a first length of the omnidirectional pressure signal, wherein the first length extends from 0 to the time of the direct sound maximum of the omnidirectional pressure signal; calculating an impulse response or transfer function of the loudspeaker using a microphone signal from an individual microphone of the three pairs, the microphone signal having a third length, the third length having at least a direct sound maximum and early reflections, the third length being longer than the first length; and calculating a direction of arrival of the sound from the loudspeaker using signals from all microphones, the signals having a second length being longer than the first length and shorter than the third length, the second length including values up to an early reflection so that the early reflections are not included in the second length or are included in the second length in an attenuated state determined by a side portion of a window function. a test signal generator for generating a test signal for a loudspeaker; a microphone device being configured for receiving a plurality of different sound signals in response to one or more loudspeaker signals emitted by a loudspeaker of the plurality of loudspeakers in response to the test signal; a controller for controlling emissions of the loudspeaker signals by the plurality of loudspeakers and for handling the plurality of different sound signals so that a set of sound signals recorded by the microphone device is associated with each loudspeaker of the plurality of loudspeakers in response to the test signal; and an evaluator for evaluating the set of sound signals for each loudspeaker to determine at least one loudspeaker characteristic for each loudspeaker and for indicating a loudspeaker state using the at least one loudspeaker characteristic for the loudspeaker, wherein the microphone device comprises a microphone array comprising three pairs of microphones arranged on three spatial axes; wherein the evaluator is configured for deriving an omnidirectional pressure signal by using the signals received by the three pairs or by using a further microphone arranged at a point in which the three spatial axes intersect each other, calculating a distance between the microphone array and a loudspeaker based on a first length of the omnidirectional pressure signal, wherein the first length extends from 0 to the time of the direct sound maximum of the omnidirectional pressure signal; calculating an impulse response or transfer function of the loudspeaker using a microphone signal from an individual microphone of the three pairs, the microphone signal having a third length, the third length having at least a direct sound maximum and early reflections, the third length being longer than the first length; and calculating a direction of arrival of the sound from the loudspeaker using signals from all microphones, the signals having a second length being longer than the first length and shorter than the third length, the second length including values up to an early reflection so that the early reflections are not included in the second length or are included in the second length in an attenuated state determined by a side portion of a window function.