To give you a background, i have never been into iems. Don'tlike the hassles of finding a perfect fit with so many combinations of tips and flange etc.I love my open back headsets and for portable i do have a vast array of earbuds to choose from :). On the topic of portable use,earbuds with few exception do falter to reproduce a very clean and tight bass.So i finally decide to get the magaosi k3 pro pro(they seemed interesting and it was 11.11).Surprised by the way they sound,till date they have been my go to portable iems. Very good low end...