Hey guys. I'm looking at speakers for a 2x15 build that I will be pairing with a tube 200w head. Since I will be limited on power I went looking for biggest sensitivity. To stop beating around the bush and just get to it, the ratings I'm seeing on winISD and the graphs posted by manufacturers is not identical. It's about 1 to 2 dB lower on winISD than the graphs show. Who am I to trust here? Is winISD going bonkers with the math, or are the people selling speakers polishing them up a bit? So far I've looked into the FaitalPRO 15pr400 but a bit less sensitive than the 3015. Being on the old continent I got some more choices, and I find the Beyma 15MI100 interesting.