Again, you seem to have missed the humor. I blame myself . . . and the medium.
We all know damping factor is important. We also have learned that the way the factor is stated varies widely by manufacturer. I could pull out my Studio Reference-II rated at >20,000 but the wimpy PS400 with its meager >400 damping factor sounds just fine to me on the 4345s. It seems to be quite capable of keeping the 18-inch woofer from sounding flabby.
Best wishes.