The ik75 seems to be a gasket mounted board. If that's the case, your board will never be as loud as theirs because a gasket mount is designed to make the sound less harsh as it doesn't travel as effectively throughout the case of the board.
It's the same concept as the tape mod a lot of people are doing, the deskpad does the same thing except It's outside the keyboard. Removing it will make the sound resonate and echo off the desk.
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CorrodedRose t1_it5s037 wrote
The ik75 seems to be a gasket mounted board. If that's the case, your board will never be as loud as theirs because a gasket mount is designed to make the sound less harsh as it doesn't travel as effectively throughout the case of the board.