It can improve or may not ...... but it will not degrade
I do not have the W4S Recovery, but my experience is when I installed the PP USB Card V4, there was night and day difference. Then, when I install the iFi Audio iPurifier in between the PP USB Card V4 and the external DAC there was again another big improvement in the sound output.
Since the W4S Recovery is a very good product, I would presume combining it with the PP USB Card V4 it will both provide improvement in the sound output.
Sir Joey, what if i installed that PP USB card to my PC and use that as my connection instead of the builtin USB port, then connect it to recovery, then DAC. May improvement pa kaya? I've been looking at that USB card din kasi..