Hello, while this topic has been already discussed, I want to share my own results

After the passive mod, in my mind the next step to improve performance is working around WM8716 ps decoupling caps

I proceeded step by step analizing the result of every single action; my system is so transparent that allows me to catch the most subtle difference in DAC signature

1) replaced the 220uF coupled to the 7805 and the 100uF near the chip with rubycon ZA 220uF 35 V: improved bass depth and weight

2) added a 1uF unbranded film cap (orange drops) in parallel to the tants for AVDDL and AVDDR: smoother and more refined highs

So far so good

3) added a couple of 330nF MKT to bypass each tantalum for AVDD and DVDD: further refined highs, but a noticeable drop in bass and overall volume, I actually have to rotate furhter the knob to get same volume before 3)


I don't really have an explanation for this behaviour, someone else does?

I'm planning to replace both tantalums on AVDDL and AVDDR with 3x3.3uF wima MKS2, somebody did try this solution yet?

Thanks