Mark, this is yet another of the audio mythologies that continue to float around. Keeping in mind that a woofer cycles hundreds of times and a tweeter thousands of times in the very first second of operation, any initial break-in has already happened in the first minute or so when the speakers were tested at the factory. If you haven't seen it, study this excellent analysis by Mark Sanfilipo in
Audioholics .
It's sometimes been said, perhaps not entirely tongue-in-cheek, that "Break-in was invented so that we could never return anything!".
