This page should contain links to individual pages on different of exciters, such as:
small/low powered exciters
medium size/medium powered exciters
Dayton DAEX32-Q 40W, 4 & 8 Ohm versions
large/high powered exciters & subwoofers
Clark Synthesis TST239 Silver "Bass Shaker"
Dayton BCT-2 "Bone Conducting Transducer"
Build your own
"How to Make A Surface Speaker" - Rudolf Maker's DIY YouTube video