Hello, I want to share my experience of three weeks with the dac smsl m300 mk2, at the exit of the box the sound quality is not up to a dac of 246 euro, at this moment I always had my dac ifi zen dac with my smsl sp200 amp to make direct comparison between them. the biggest problem i found is that the separation of the instruments was mediocre and that the treble was not clear or brilliant. find a youtubeur who tests on audio equipment who has experienced the same situation with this dac, he advises to leave it running for a period of 48 hours to have the true potential of this dac.i did the same thing but the quality did not change much and so I extended this duration to around 150 hours. one day I started my favorite music and there it is the miracle I discovered a new sound, the sound scene is huge and dynamic with very good separation of the instruments, the mediums are detailed and natural, the highs us are detailed and lively without being exaggerated. the bass is very punchy and makes my akg k712 headset vibrate which never sang like that before.