Audio Equipment for Your Home Practice! Check out this auction for some audio equipment. This lot consists of 1 Grason Stadler, audiometer model 1723, 1 Masden Elect audiometer visible speech, 1 Grason Stadler, audiometer model A0742, 1 Masden Elect, audiometer, 5 Interacoustics USA, hearing and fitting system, 1 CALDWELL LAB Electromygraph with four channel amp, 1 Nicolet Audio …