Originally introduced as the SR-007 and later updated to the SR-007A, this third-generation model retains the signature round earcup body and open-back design, but includes significant upgrades, many of which are inspired by STAX’s current flagship, the SR-X9000. At the heart of the STAX SR-007S are redesigned internal components, including a new diaphragm and fixed electrode structure. STAX engineers have reduced the diameter of the vents by 20% compared to previous generations using a precision etching process. This change optimizes airflow and improves acoustic output, delivering greater clarity and resolution without sacrificing the signature warm, rich sound of the 007 series.