I had never thought that transducer break-in was possible or happened, but I'm not so sure. By break-in, I don't mean work-in which I have noticed with large subwoofers with stiff soft parts. I.E., my SX15 I had in HT duty would get better and better every week after I bought it once the suspension loosened up. However, I swear I'm noticing this with my 5.25" TB subs. When I first built it, the output was okay and the sq was alright. Now, it blends perfectly for a computer audio system. It drops lower and sounds tighter. Is this delusional, or does this actually happen?