Curious about speakers burning in process.

I don't think that break-in affects the frequency response. But there's no question that well-used speakers sound different from fresh speakers. The mechanical parts (particularly the spider and surround) must loosen up before the driver operates as intended. One way of quickly breaking in speakers is to play pink noise through them at a moderately high level, then position the speakers so that they are facing each other nearly touching. Reverse the speaker cables on one speaker and throw a blanket over the pair. Reversing the leads to one speaker causes them to be out of phase so that the pink noise is less annoying. The blanket damps the sound. You must first set the level with the speakers in phase so that you don't turn the level up too high and damage the speaker.

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Thanks for the speakers break-in technic Mr Harley and Wasatch,
              For you as a reviewer, how long did you break-in the speakers before you start to make a serious review ?
I got a pair of black Revel Ultima Salon2 last month. I found they are not sound like the loan demo unit that dealer  lend me
long time ago. It lacks power and room filling sound that I like so much with the demo units.
             For how many hours can I  expect them to perform like what you heard the reviewed pair or like the demo pair I heard ?
 Now my speakers have been used for about 90 hours. They're driven by  a powerful Denon AV receiver.
             Thanks
         
 
                                                                                                                             

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