So what is an ES .... simply its a speaker that doesn't create sound ..
instead it creates sound as a magnetic field.
The ES can turn any portable electronic device like a MP3 player, Recorded or even ipod or Cell
phone into a magnetic broadcast system.
Well It's commonly held that a great deal of Paranormal Activity is related to EMF.
So why not broadcast trigger music in an audio format as a magnetic wave rather than sound.
With the ES your next EVP session can have full time trigger music playing with out disturbing
the audio EVP recordings.