I have used my rti1 for about 60 hours now and they sound great. Could have more bass. But the cable has failed after 4 weeks. I have to say rhapsodio makes amazing iems but their cables are some of the worst I have seen. My rhapsodio R^2s cable just fell apart after three weeks. Other cables I have still works after several years.
Thanks for answering. I have a Em32 but before I went with the EM32 I was looking at the K10. I seem to have made the right choice. I think it has about as much bass as the Heir 8a but less midbass and tighter.