What is the small box and transformer on the right hand rear of the speaker?
This is the mains transformer and the little box “on top” is the EHT (Extra High Tension) step up ladder sealed in bees wax. The output of the mains transformer is around 610 Volts AC with enough current to kill(!). The very high voltages are delivered at minuscule current levels, and are paradoxically quite safe. It’s the amount of energy it delivers that can stop your heart, not just the voltage.
