akkahmalakahThe old Radius TWF11r was my favorite IEM for years and was an incredible value at ~$160 six years ago. not so much now... pick a $60 IEM today and it'll handily beat it. Then the TWF21 was released with an updated design and even higher price but it was supposedly just marginally better, with a slight shift in sound signature and better fit. No one has really talked about Radius IEMs since those 5-6 years ago. I heard one comment about the TWF31 a while ago though, but nothing more than "it sounds good". I don't doubt that, but just really question if it's worth the high price now.