Hello, I want to share my experience of three weeks with the dac smsl m300 mk2, out of the box the sound quality is not up to a dac of 246 euro, at the moment I always had my dac ifi zen dac with my smsl sp200 amp to make a direct comparison between them. the biggest problem I found was that the separation of the instruments was poor and the treble was neither clear nor bright. find a youtubeur who tests on audio equipment that has experienced the same situation with this dac, he advises to let it run for 48 hours to have the real potential of this dac. I do the same thing but the quality has not changed a lot and so I extended this time to around 150 hours. one day I started my favorite music and there it is the miracle that I discovered a new sound, the sound scene is immense and dynamic with a very good separation of the instruments, the mids are detailed and natural, the trebles us are detailed and lively without being exaggerated. the bass is very punchy and makes my akg k712 headset vibrate which has never sung like this before.