Not a lot more, but it was noticable at sound level of 5 on her cd player. I know mine puts out 98Db sound ratio, you can compare that to mine/iPod mini, but I think you may have a problem with your wiring, wire used, or it needs some sort of amplifier. I'll do some research on what your mp3 player puts out. I wasn't able to find how many mV it put out last night on a quick check.