The 7025/12AX7WA is a top-class vintage version of the 12AX7. At the time, Russia manufactured excellent electronic components for the aerospace industry, and adopted vacuum tubes with strong vibration resistance, high durability, and low noise for the space industry, such as rockets and artificial satellites. (W indicates vibration resistance, and A indicates low noise.) Sound output has been confirmed before listing. Please take a look at the photos and consider using it in the EQ of your amplifier or guitar amplifier, etc.