I don't know much about audio history, but I think Behringer started the entry level audio.
They put in regular people's budget audio equipment. They do what they have to do to make it as cheap as possible, even if they have to steal some designs here and there. I don't think that's morally correct, but it's like mp3 piracy. It does bad but it also does good.
Example: Behringer stole a mixer design from Mackie. I bought the Behringer mixer since it was so damm cheap and it was the only one I could afford. If I woulnd't have bought the berhginer I probably wouldn't even have started to think about making my own studio. So in a year or two when I have some more money and my Behringer mixer breaks up, what am I going to buy? Probably a mackie or similar brand. Which I wouldn't have bought in the first place if I never started my own studio with that cheap ripp-off behringer mixer.
So from a musicians point of view, who already has to spend a lot of $ on musical instruments, they are fucking awesome.