Despite my initial comments about the IM70, I have found them to be the most fun, best (and best value) IEMs I have owned to date. I would simply say that choice of tips is paramount to achieving proper isolation, bass control, fit and comfort, etc. I personally am using Sony Hybrids. Once everything is snug and comfortable, they are just a joy to listen to! Big thumbs up!
4/4/15 at 8:32am