I recently bought a pair of in ear headphones, Shure SE530's, to use with my Macbook Pro. The problem is that it has a very low impedance rating so even at 2 ticks on the volume, the sound level in the headphones would almost be deafening. I know that the internal speakers and headphones have different volume settings but I was wondering if there was a way to cap the headphone volume range similar to a ipod limiter. Where if I cap the headphone volume at like 6 ticks, it'd stretch out the whole range from mute to that level?