same as a TRS balanced cable? I just bought a pair of Mackie MR5 studio monitors, and I tried plugging in a 1/8 inch stereo cable into my computer and plugging a 1/8 to 1/4 inch adapter into the end of the cable, then plugging it into the back of the monitor. I am not getting a clean sound, and I can not hear some high end frequencies (especially vocals). Can anybody help? Thanks