If you are thinking of the
Xduoo TA-20 then yes it is a good match, as the TA-20 supports 8ohm to 600ohm. And, the WP900's 100 dB/mW sensitivity should help too.
The
Xduoo TA-26 is a tube only AMP and the design supports 60 ohms to 600 ohms, so it would not be a good fit - theoretically - with a 38 ohm headphone, but here I am enjoying the sound of the TA-26 on my 25-33 ohm Ananda's, where Hifiman's listed 103 dB/mW sensitivity helps it perform well on the TA-26.
So IDK what to say, by specs the TA-26 wouldn't work, but it will likely depend on the headphone - and how it interacts with the TA-26 in real life.
Also the TA-26 handles 600 ohm with more punch than the TA-20, even though both list 600 ohm support.
With the TA-20 I can run the full output of my Topping D90 4v XLR into the TA-20 with all of my headphones, Xduoo lists maximum input voltage as 8v, but the TA-26 Volume control seems a bit over sensitive in that it has a very small volume "range" on the dial if I run the full RCA input from the D90. Especially with my Sennheiser 660s, it helps to attenuate the D90 output from -12dB to -20dB to get more travel on the TA-26 volume control.
I hope you were talking to me, asking about the TA-20/TA-26