First off, looking at the inside, I notice two sets of terminals on the motherboard of the cabinet. Woofer A and Woofer B. The wires are connected to Woofer A. What is the difference? Second question. Does anyone else have any issues with the horn being super noisy? I turned mine off because it was so bad. Third. I am very disappointed in the fact that the PF500 head leads you to believe that you can run the head at 500 W, until you realize that the only way to do this is buy a 4 ohm cab, or buy the second extension cab for the PF500 head that allows you to run at 4 ohm and 500 W. Why not just call it what is is and call it a PF350? Because that's real all you're getting out of it. I would like to disconnect the horn all together and make this a 4 ohm cab. Would this be an easy process, or would I need to purchase a whole new speaker to run the cab at 500 W?