Has anyone tried Spinfit CP500 or CP155 on FD5? I've noticed that the wide eartips make treble more crystal sounding, and overall sound becomes harder and more accurate. I kinda like how oem bass tips sound, but it also makes treble much louder. So, I'm searching for eartips that will subtract the treble yet make it crystal clean if that's possible.
Have you tried a silicone tip? Even the stock silicone tips are pretty good. And I agree the FD5 does so much right it just needs a touch of that treble energy tamed a tad.