The big one is OPA564. The small one is OPA1612. What is their purpose in the THX888 module? Is the output of one feeds the input of the other? Is one of the controls the feedback of the other?
Sorry for reviving an old thread but I just watched the latest video on Headfi's YouTube regarding MDAQS. It sounded like BS in the first one, about a year ago, and it sounds the same today.
I like the way the Headphone Show presents its measurements. It gives a range most people's preferences...
L50 has no difference between the balanced and SE inputs which means it works as SE-only input. You can compare specs but the SP400 will have more power. The question is if you need more power.
Got my EHA5 today and it has the same problem. It seems to be unable to handle a full 4 volts in passthrough mode. I use PC as the source and have tried it with multiple DACs. Finally turned the PC volume to 40 out of 100 and the distortion went away.