I dug into the Alpha Prime and AK100 II a bit further.
Dan told me the AK100 II might not be enough to drive the Alpha Prime, and I believe he is correct when using the balanced connection.
For the unbalanced 3.5mm jack the output of the AK100 II, AK120 and AK240 are almost the same.
From AK Site:
AK100 II Output Level: Unbalance 2.0Vrms / Balance 1.7Vrms (Condition No Load)
AK120 II Output Level: Unbalance 2.1Vrms / Balance 2.3Vrms (Condition No Load)
AK240 Output Level: Unbalance 2.1Vrms / Balance 2.3Vrms (Condition No Load)
I have the AK100 II and must say it drives it very well with the 3.5mm cable.
The Centrance M8 adds the very low base (to my impression), you can hear every vibration of a string bass on the Alpha Prime, heck, even the vibrations of the bass drum you can pick-up. Very tight, very fast bass of a very pure nature. I feel like the Centrance sometimes adds a bit to much base. It can be 'very' present (also in Centrance as PC/USB DAC).
And of course, the Centrance M8 is far from its max output to drive the headset, the AK 100 II does not have it that easy I think.
On a side note: The Alpha Prime is also a "wauw" gaming headset. Battlefield 4 is quite something!!
I' ve been using the Prime in the at home for music, for gaming, on the go with my AK 100 II and in the office on AK 100 II and AK 100 II + Centrance. Lucky me that my IT colleagues find this cool and not "abnormal"! Although the team leader asked me if I could get the airport control tower on it as well!?
(no comments yet on my review .... or it is not very good, or people don't comment much)
Edited by CasperBxl - 11/21/14 at 12:04pm