The Stax SRM-500T is an electrostatic headphone driver that is designed to pair with Stax electrostatic headphones. It features a high-quality amplifier circuit that provides the necessary power and signal conditioning for electrostatic transducers. The SRM-500T has a solid-state output stage and is known for its ability to deliver detailed sound reproduction with a wide frequency response. It also includes a variety of input options to accommodate different audio sources, such as balanced XLR and unbalanced RCA inputs. The design emphasizes low distortion and high signal integrity, making it suitable for critical listening and audiophile applications.