The Stax SR-Gamma Pro is an electrostatic headphone designed for audiophiles seeking a unique listening experience. This model features an open-back design that allows for a natural soundstage and a more immersive audio experience. It is typically used in conjunction with a dedicated Stax amplifier, which is necessary for driving electrostatic headphones. The SR-Gamma Pro is known for its lightweight construction and comfortable earpads, making long listening sessions enjoyable. The frequency response typically ranges from around 10 Hz to 30 kHz, providing a wide bandwidth that captures deep bass and crisp highs. The headphones exhibit low distortion levels and exhibit excellent transient response, contributing to their clarity and detail. The impedance of the headphones is generally low, which allows them to efficiently pair with compatible Stax amplifiers. Overall, the SR-Gamma Pro is designed to deliver a detailed and engaging listening experience that appeals to those who appreciate fine audio quality without compromise.