Oh boy am I going to get it now! Yes, I have done searches. In those searches I have learned that some people's view is, "You have to be stupid to mix driver sizes. It's anti-scientific. How can you possibly be that dumb?" Also, science people call speakers "drivers". On the other hand, some say "But dude, I don't care how sciency it is, my 210 and 15 sounds so cool together." The manufactures seem ok with mixing drivers. What my searches have not turned up is the actual science that mixing drivers desecrates. I have seen vague references to dropouts and beaming but nothing about how this actually takes place. In my simple little mind I don't see any problem with two cones of different sizes moving in unison and in phase. I don't see how one would interfere with the other at all. I'm not saying that the anti driver mixing people don't know what they are talking about. I'm just saying that I don't understand how that would happen and haven't seen it explained. I am actually very confident that there are a number of guys here that can explain it. Show me the science.