I paired it with a Lehmann Headphone Amp (China rebuild by SUQIYA Audio) and it sounds great right at this moment with a pair of AFUL Performer 5.
Now, the Lehmann/AFUL combo sounded also good with a FOSI Audio DX-3, but imo the SMSL sounds even better. Part of it may be, that the SMSL supports DSD, which the Fosi did not. The Combo has a slight hum though, which is less than with the Fosi, but still noticeable ... when I turn the volume to about 50%, which I can only do, when no music is playing, otherwise I'd need a hearing aid and hum wouldn't be my least concern.

I might have to try this Y-split cable too. Although it could also be the amp.
I still have to open the Lehmann, because I got these OPA2134 PA and MUSE02 to play with.

They should improve the sound even further. Not sure were this will lead to.
