The Stax SRA-7S is an electrostatic headphone amplifier designed to drive Stax electrostatic headphones. It features a compact and elegant design, aimed at enhancing the listening experience with clarity and detail. The amplifier is known for its low distortion and high damping factor, ensuring accurate sound reproduction. It includes a built-in volume control and is compatible with various Stax headphones. The SRA-7S provides a wide frequency response, enabling it to reproduce both low and high notes with precision. The device typically requires specific power supply considerations due to its unique operating principles. Overall, it serves as a high-performance solution for audio enthusiasts seeking to maximize the capabilities of their electrostatic headphones.