Was this the Geek Out Version1 or the current?latest Version 2? Seems the Version 2 is significantly improved over the first version.
I never took to the first version. Very detailed and transparent but lacked didn't sound engaging or musical to me. Lacked fullness and warmth.
So I may really prefer the Dacport Slim. But as for "heft and bite"...what do you mean? When you say fullness it sounds like full mids but when you say heft and bite, sounds like V-shape--bass boost and treble brightness.
Thanks for the review! I wanted to do one myself, but it seems that CEntrance aren't answering my emails at the moment
In regard to harder to drive headphones, are you sure that the HE1000 is a good test of that? I mean, after all, the HE1000 only has a 35 ohm rating, which is closer to portable than anything. Sure, it benefits from power, but it sounds good out of an iPhone 6 as well...
Do you have a K7XX, HD600/650, or a Beyer T90 to pair it up with? That would really test if it was meant for harder to drive headphones, IMO.
I used harder to drive headphones such as the HD650, DT 770 600 ohm version and HE1000 with the Questyle QP1R, and the DACport Slim powered the HE1000 to louder volume levels, which means I would presume the DACport Slim should power harder to drive headphones to at least normal listening levels. With that said, every headphone and listener is different, so it may be best to try your specific preferred combination (headphone, source, etc.) and choose what sounds the most optimal to you.