In reply to:
i have read about reviewers breaking in speakers by reversing the wiring polarity of one of the speakers, face them against each other, pop in a CD on 'repeat' and go do something for a week or two...the reversed polarity is supposed to cancel out the sound from the speakers
Hmm.. that's kind of two wrongs making a right. Reversing the polarity on one speaker causes phase cancellation (and thus attenuation), but then facing the speakers at each other puts them in a push-pull arrangement (like an isobaric sub) so they're both moving in unison as one speaker. That's definately the oddest way of speaker break-in I've heard of.
So how do you know how long to break them in for? If it takes 168 hours (24x7) to break them in until they sound good, does that mean after the next 168 hours they will be too loose and sloppy? And 168 hours from then they'll be so mellow they'd rather sit back with some ganja and listen to Bob Marley than reproduce any music themselves?
Break in happens in less than 10 seconds, and is really limited to getting all the parts moving for the first time after manufacture.