Guys and Gals, I need to learn as much as I can about them, as I'm thinking of purchasing one in the near future. Some of the questions I have are: Are they safe you use? How do you hook one up in a combo amplifier? What are the best ones for the money that are reliable and safe to use? So far I've been pointed in the direction of a Weber attenuator or the Marshall Powerbrake, I think a powerbrake runs somewhere around $179, but I'm not sure about the Weber. I appreciate your feedback!