I am thinking about trying a pair of Weber 1265's in my Avatar 2x12 because I want something warmer with a better bottom end than the G12H-30's in there now. I see on Weber's website that he offers the 1265 with speaker doping either light, medium, heavy, or "pre-Rola style". Does anyone know what the pre-Rola doping is and how if differes from the other 3 options. What are the advantages and disadvantages of each option? I'm not sure yet if I want the doping or not.