... functions. Features: 1, DSP Digital electro-acoustic power testing platform can select different types of power output combination according to ... . 2, It has outputs of single side 5 paths, double sides 10 paths and four sides 20 paths. 3, Also ... sine sweeping frequency signal DSP Digital electro-acoustic power testing platform is suitable for:Minitype loudspeakers (mobile phone, earphone, microphone, ...