Quote: Hi Anak.. The gain that i always use is at high gain. The medium gain is just too low to drive my cans. Although all my cans mostly under 100ohm (except hd650) but with medium gain it does not give me enough power to light up to max performance (though at max volume). I though the clas db will give a bit of power..but sadly is not ! I still can drive my shure535 or sm3v2 at medium gain with fuller sound. This because they are iems with low impedance. It is not the case with my SM64 which has 112ohm impedance and i must use the high gain to drive it to get a juicy sound. Is that mean my clas db is the one with 1.2V ??