But what gain setting was on the Rx Mk3 when you were driving the HD650?
To answer Currawong's curiosity, the new CLAS -dB is now at 1.69V whereas the original CLAS from 2 yrs back was 2V. Note that the initial release of -dB were at 1.2V however most of that should have been re-called by now (except for mine).
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 ??