I just carried a quick amp test and my results are as follows:
Portaphile 627x: Sadly this amp proves to be the worst offender. Mojo has out classed this amp by a large margin.
Meir Audio quickstep: This amp did not alter the sound but to me there is no point in pairing it with quickstep as Mojo alone offers far more volume than paired with quickstep.
Wagnus Epsilon S: Expanded the soundstage which was nice but like the other amp the amp section is just nowhere as...