The present invention relates to a stage-variable stage acoustic apparatus positioned on the left and right sides of a stage (S), comprising a lower body (11) formed with four lower attachment / detachment holes (12) A main base 10 including a lower turntable 13 rotatably supported on a lower body 11 inside the lower attachment / detachment hole 12 and on which a first speaker SP1 is seated; An upper body 21 which is located on the upper side of the main base 10 and is formed with four upper attachment and detachment holes 22 formed to be opened downward on the side of the main body 10, A sub base 20 including an upper turntable 23 on which a second speaker SP2 is seated; And a support frame 30 detachably coupled to the lower attachment / detachment hole 12 and the upper attachment / detachment hole 22, the support frame 30 having a total of four.
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