Buy Dayton Audio DAEX32EP-4 Thruster 32mm Sound Exciter - 40 Watts RMS 4 Ohm Imepedance - Audio Transducer - Turn Any Surface into a Speaker System - for Large and Rigid Surfaces
Dayton Audio EX25FHE2-4 Framed High Efficiency 25mm Interchangeable Hardware Mount Exciter 24W 4 Ohm