Mebaali, I really recommend to slap on some large bore Philips UE silicone tips on them - they get noticeably better with less mid-bass bump and more open soundstage. Unfortunately, for my taste, imaging (vocals and bass placement) was/is little too inside headstage and mib-bass still causes little "irritation" after some listening. Also got them for 52$ from gearbest. I prefer Magaosi BK50 (also with Philips UE tips) over them. Thanks for early impressions! If You get them "burned-in" and start more thorough comparison - please inform us what music did You use and what was the source gear. They might be my next IEM if Senfer 4in1 modding doesn`t show improvements.