Thanks to those who have added to this thread, I've got some B3 Pro-1s today. It took a little time to get a good seal fitted shallow with some wide-nozzled tips, but I've found some that work for me. They play very nicely indeed with my ibasso DX90. Listening now to Cheskey's binaural album, and it's fantastic with this setup, the bass of the organ in Mozart's Ave Verum is in no way missing. Look forward to hearing how they change with some hours on them.