... If your already late for your flight.
I learned my lesson, steel toed boots and a portable headphone rig wont make your journey to the boarding gate any faster. In fact you will have a pleasant company of the local security squad. A warm and welcome pat down, some strange machine that turns around you humming and a detailed questioning "Wtf is this? DId you make it yourself? Why do you need an amplifier? Is it a hearing aid? No? Than whats the point".
Well... lets see how the Germans react... 45 min connection flight.... oh my...







Open headphones on a plane?

