I have been doing this for universal IEMs using shapeways but now also using my own FDM printer with ABS filament. See http://imgur.com/a/D7JIU

Ive recently bought a pair of RS130 and through many hours of listening, began to notice some heavy distortion around the mid range frequencies (somewhere around 1000hz esp with pianos). Can anyone tell me if I have received defective headphones?? (found the distortion problem to be severe when...