Zeph

A one-piece headphone design The goal was straightforward: create a headphone with no resonance and a sound as dynamic and clean as possible. That pursuit pushed SJY toward a simple yet radical solution: remove all non-essentials. The Zeph’s driver, chassis, and ear cup form a single precision-machined structure, reducing variables and minimizing vibration. This approach enabled the thinnest chassis SJY could physically build—just 7mm—resulting in a fast, low-resonance open-back headphone with nothing standing between you and the music. Low distortion & minimal energy loss The Zeph’s goal is Immediate response, low distortion, and minimal energy loss. Traditional headphones place a driver inside a cup, leaving multiple surfaces and interfaces that can vibrate. The Zeph eliminates those surfaces entirely. With the driver itself being a single machined aluminum body, the entire assembly behaves as one piece: stable, rigid, and sonically quiet. This tighter control over motion enhanc