I'm planning on setting up a small sound board/mp3 player type that I can use in addition to my mic. Currently testing it with my laptop as the mp3 player until it gets here and I just can't get it to work, Basically, it's either one or the other. The Aker I have apparently boasts to ability to use it with an mp3 player and if I plug a male-to-male cable from my laptop headphone socket to the mic-in socket, I get sound from my laptop through the speaker. If I replace the male-to-male with my mic cable, I get my voice through the speaker. I've tried mic/speaker splitters to try and get both of them simultaneously to no effect; either way the speaker works, but I lose the mic capability when I use a splitter. Not sure where I'm going wrong or if it's simply not possible. I don't think I'm supposed to plug anything into the line in plug but I've tried that too with no results.