I have to do this project in my engineering class where we research a product and have to research its history and how it has improved over time, yada, yada yada Anywho... I want to do guitar amplifiers or effects pedals but I can't seem to find anything on the first one made. I just need to know what the first commercially available guitar amp or effects pedal was and I can go from there. So does anyone know? Any guesses? I just have to be able to find out when it was made, who made it, what were some parts used, etc. Any help is appreciated, thanks.