The Branson Purple Booster (400 & 800 Series), Part No. 101‑149‑043, is an aluminum booster designed for the 400 and 800 series ultrasonic welding systems. The purple color coding indicates an amplitude reduction ratio of 1:0.6—meaning it attenuates the ultrasonic amplitude to 60% of the input, which is useful in applications requiring finely controlled energy delivery. This booster uses the standard 400/800 series mounting interface, ensuring compatibility and ease of installation.