Features: The sound is full, the high frequency is not harsh, and the low frequency is very elastic. It can shrink freely, and you won't feel tired when you listen for a long time. Dynamic, no noise, more suitable for listening to rock, pure music and dance music. It can replace the op amp, different combinations, different tone styles, filter capacitors for high quality imported Sanyo patch computer. With full patching process, machine welding, consistent performance. The potentiometer is an imported high-grade sealed step potentiometer with good rotation resistance and good hand feeling. The circuit is designed as an arc to avoid current glitch at the tip of the corners, which simulates a grounding. Help the player with less thrust to drive the headset better. Help headphones with high impedance or low sensitivity to be better driven. When the volume is turned to the maximum (when muted), the noise floor is basically inaudible. Add sound field to enhance stereo and depth. Specification: Condition: Brand New Color: Black Material: Metal Number: XU09 Package List: 1 x USB Line 1 x Audio Line 1 x Host 1 x Instruction Manual 1、The sound is full, the high frequency is not harsh, and the low frequency is very elastic. 2、It can shrink freely, and you won't feel tired when you listen for a long time. 3、Dynamic, no noise, more suitable for listening to rock, pure music and dance music. 4、It can replace the op amp, different combinations, different tone styles, filter capacitors for high quality imported Sanyo patch computer. 5、With full patching process, machine welding, consistent performance.