On Changstar I discovered the gem called KSC-75. (Way too late to prevent stupid side-grades though.) In the coming time I will have some cash to spend on audio again and the bang-for-the-buck KSC-75 will be one project I am going to spend time on. How about putting all the modification methods in one single thread again? The quarter mod or "cutting out a quarter size hole in the ear pad material covering the driver" already made a difference. My personal goal is to create a semi-open KSC-75 with a fuller low-end, fuller midrange and mostly open sound.