Amazon.com: 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 : Electronics
Sinuslive Bass-Pump III Exciter-kaiutin 130 mm 80 W 4 Ω | CDON
TEAX14C02-8 Tectonic | Tectonic 37mm dia 800mW nom Full Range Audio Exciter, 8Ω, 300 Hz → 20 kHz | 876-5272 | RS Components
Exciters Buyers Guide
Amazon.com: Dayton Audio DAEX25 Audio Exciter Pair - Sound Exciter Pair Audio Transducer - 5 Watts RMS, 8 Ohms Impedance - 2 Pack - Turn Any Surface into a Speaker System : Electronics
Build a Pair of Custom Speakers : 7 Steps (with Pictures) - Instructables