listened to about 15-20 tracks yesterday, the headphone output seem to be suficient for driving the DT150 250ohm but the AKG K601s were a whole different story
Wonder what happens if connect a dedicated headamp to my case's front panel green jack, set the card's volume to 100% and adjust accordingly with the amp's volume knob ....
beamforming mic along with the crystal voice enchancements was a very nice bonus, finally got rid of my zalman clip on mic
I would advise strongly against using the front panel output. Not sure why you would want to. Why don't you connect it to the headphone out.
Most worries about double amping were dispelled as some users have already done this with no degrade in quality or issues.
The front out in the z bypasses the DAC anyway I believe and uses the soundcore 3d internal DAC. More testing with this is needed.