What’s that? You say these look like headphones, so why are they called earspeakers? Well, maybe it’s because the Stax SR-009 are beyond headphones. Yeah, when you charge $5,200 a pop, “cans” ain’t gonna cut it in the product description. Electrostatic speakers (and headphones) use ridiculously thin, flexible, diaphragms to generate sound in a way that other speakers do not. Quite frankly, it’s a mathematical equation that we find too complex to fully comprehend. However, the earpads being made out of genuine lamb leather, that is a topic we know plenty about.