A plate reverb is an effect device in which an artificial reverberation is generated due to the good vibrating ability of metal and can be picked up with pickups. The principle is quite simple, so you can build it yourself with a few hardware store items. Sound can be mechanically influenced if you position large nuclear boxes in front of and behind the sound converter. Furthermore, you can attach several pickers and then adjust them with a small mixer as you wish.
There are three pickers here now. Mixer is a Monacor Rackmixer MMX 26 with 6 mic input, heights and bass controls. Hi and lo out. The sound converter has 10 watts and is controlled via a Vermona VM 30b bass amplifier, which you also have a 3 band EQ, where you can prepare the signal when it hits the metal plate. So overall quite a few variations possible.