Quite simply, a sound exciter is a loudspeaker without the frame and cone. Exciters function by replacing these components with a rigid surface which vibrates in order to create sound. This is why exciters are often referred to as the “invisible” or “universal” speaker, as they can often be placed on surfaces not conducive to traditional speakers or in locations where hidden speakers are desired. They are not screw mounted, but adhered to the desired rigid surface which then becomes the "speaker". Exciters are ideal for a variety of applications including home improvement, DIY non-audio projects where sound is desired (picture frames, whiteboards, doors, cosplay costumes, robots, etc.), OEM projects requiring sound, and much, much more!