Actual i30 & i60 owner
From an actual i30 & i60 owner (yes, both), this app is perfectly compatible with both units running El Capitan. Don’t down-vote the app because it doesn’t work for headphones other than those that it clearly states that it supports. Read the app description - why would you think that it would work for units other than the ones that are specifically listed?
I ranked it 4 stars because there are some missed opportunities for feature support in the software. A slider bar volume control and equalizer would be welcome additions.
lnxprof about Ear Force Audio Hub