TransducersTransducers create vibrating and shaking effects. This is how they work... A speaker contains an electro magnet that moves a cone which displaces air. A transducer is similar but instead of a cone it contains a steel piston that moves and creates vibration. Just like a speaker, a transducer requires an audio source. The lower the frequency the better as this will move the piston the most. That's why we offer the LOW FREAK FX audio CD to maximize the shaking effects.