Do you mean the Micro iDSD combo vs the Lyr + HPA4 stack? Sure, I can do that, but since the HPA4 acts as a preamp, where should I leave the volume knob at for a fair comparison? The other issue I can think of that might affect volume is that I'd using Fostex Audio player with the HPA4 + Lyr stack and Foobar with the Micro iDSD. BTW, I'm pretty much a newbie, so take what I say with a pinch.....no, a cupful of salt.
thanks for replying.
I mean headphone out of both fostex and ifi without any external amp.
which one is better pairing with k812?