Do they have to be dynamic, V-shaped and ready-made?

Ty Mr. Butterfly, could you please help me first with a link to the datasheet and tech specs pdf? I'm starting to think someone was selling a mislabeled GK-31732

I made a pair of IEMs using the GV-32830 and got great results using dampers, as the GV has an excellent amount of bass/sub-bass, a sweet, smooth and balanced sound. It doesn't sound flat at all, quite the opposite! I have tried several proposed combinations of RAB, GQ, GK and in the end GV is...

NVM