"You prefer soft drivers, right? Yes, that’s what we use at Sennheiser. Now, a softer diaphragm on its own can have resonances in the audible range. So we add a damping material to the driver — it works similar to a car door. If a car door were pure sheet metal, you’d hear a crashing sound every time it closed. But with dampers, you get the nice sound that a door should have. This is how our dynamic drivers behave. You just hear the basic impulse, not all those grating high-frequency resonances"