Here is one of the specifications from a BBE 482i:
Lo Contour: +12dBu adjustment at 50Hz, -10dBu input
To those that think BBEs are a problem ... your biggest problem with this device is trying to use it with +4 gear. This model is a consumer level device and you can't run it in line with the output of a mixer. Everything else about it is an effect and just like a reverb there is a place for it and a place where it sounds bad. Operators make bad decisions all the time. It's a poor craftsman that blames his tools.