Ok well currently i have two 12" Kicker L7's in 5 cubes ported tuned to 38Hz getting 750 RMS each. I plan on buying one of Rays 18" RE MT's. I will eventualy get another but for now just run the one by itself. My question is, with the same amount of total power, in general, will the RE be louder than the two kickers even though the square area of the subs is larger then the round area of the 18? So basiacly my question is how does cone area affect spl? Thanks for the help