sp400

I'm looking at replacing my Topping A50s with the SP400 as a headphone amp/preamp to my speaker amp. I'm curious to know if the input impedance stated by SMSL is real because my DAC (Denafrips Ares II) has oddly high output impedance which doesn't play well with the A50s' strangely low input...

Hello everyone, Firstly i'd like to say i am an avid reader of the forum but in no way an expert, in fact i am probably a n00b. now i've got that out the way here is my questions. Gear: SMSL SP200 (RCA In ) SMSL M400 (RCA out) (Optical in) Audio Engine D1 (superseded) Sebaj PHA-2 (superseded)...