The Japanese brand Stax is generally known for one thing: headphones. Specifically, electrostatic headphones.
Most headphones use dynamic drivers and some use planar magnetic drivers. For both, the current is driven through a coil within a magnetic field, thus causing the coil and an attached diaphragm to move. Electrostatic drivers place an extraordinarily thin diaphragm within a high-voltage electrostatic field, and then alter its voltage, causing it to move.
The responsiveness of this system has been almost legendary, and Stax has been producing electrostatic headphones for more than sixty years. It knows its stuff.
