ok I hope I'm posting this in the proper forum. I joined hopefully to get an educated guess with this.Ok so i bought a used atpl120 it did not come with a cartridge just a headshell. Anyway I bought 2 different cartridges one for regular record playing and another for playing 78s. I bought another headshell to use for the 78 cartridge hooked it all up and it played great well then I went and tried the other cartridge hooked it up to the headshell that came with the turntable and got no sound other than hearing the music from the surface of the record. I initially thought maybe the lead wires on the headshell were bad so I went and bought a brand new one and hooked it up and the same thing happened. I know it's not anything to do with something hooked up wrong otherwise the other cartridge wouldn't work. Defective cartridge perhaps ? Any input you guys give would be greatly appreciated!