After listening to these speakers for several months I have learned alot. My amp is plenty to drive them to deafening volumes and there is no distortion I can hear from delamination, although some day I plan to uncover them and look. I received the 1D manual and realize I must have sounded like a fool, the guy I bought them from told me the three panels were bass/mid/tweet. As you guys said after I re-read, two panels are bass/mid and the third is the tweeter. Placement of speakers is critical. I have them set up as the 1D manual suggests, outer bass/mid perpendicular to and up against the wall, center bass/mid toed in slightly and the tweeter panel on the inside pointed to cross in the middle by aiming at the opposite ear. Stage placement is better this way but I found it is not as important as the realism these speakers present. The bass is probably going below 40Hz and on most music a sub is not necessary. They sound REAL!!!! My Infinities are in another room. Of course, now I want to try bi-amping. Suggestions on an active crossover, preferably used?