Is the input impedance of SMSL SP400 actually 47k?

[Loomynarty]

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 impedance.
Damping factor in dB is around -1.94 dB with my current setup. With SP400 it would be around -0.23 dB.

Is this something I should be concerned about?

Thanks in advance!

 

[Snoopy]

Just sell the ares 2 and get a well designed D-S DAC instead

 

[Loomynarty]

Just sell the ares 2 and get a well designed D-S DAC instead

Ok, I bought the Gustard X16. Happy now?