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Speaker Asylum General speaker questions for audio and home theater. |
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Speaker Asylum General speaker questions for audio and home theater. |
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In Reply to: How can we tell posted by genungo on June 4, 2015 at 06:57:45:
In theory you could measure a brand new unused model and a 2 year old model and determine the difference - I believe this was done with a B&W and there were measurable differences in the audible spectrum.
The problem of course is that most speakers are not pair matched closely enough nor were both models of the B&W measured out of the box to account for the variance of the speakers (nor was one then kept in the box for two years while the other played). So while there were measurable differences between the two sets you don't know if those differences were there on day one and you can't assume they pair match - B&W 801s were measured by Ken Kessler many years back and found to be +/-2.9dB between a speaker pair so if left speaker at any given frquency is 3dB off the right speaker then what chance do you have comparing another set of B&W 801s? And they're a big company that makes their own drivers - fat chance the companies buying them off the shelf are going to do much better.
I will say this - I had B&W 302s and for the first 10 hours they would often pop like popcorn bag in the microwave. That is by far the most noticeable break in I have ever heard. Only for the first 10 hours or so - then they were perfectly fine for the next 3 years. That model was a paper woofer and soft dome tweeter. I suspect it would be somewhat material dependent.
With my AN's with rubber surrounds Peter Q said there would be no break-in with the rubber surrounds - only with the foam surround models. The AN K back then only came in rubber surrounds. The B&W certainly suggests there could be some to even downright dramatic changes.
What is puzzling is the generalized "30 hours to break in" kind of thing. You would think it would be more about cone movement - so play the loudest dynamic heavy thrash metal really loud for 2 hours would seem to me to "break in" a speaker much faster than Kenny G at 70dB for 50 hours.
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Follow Ups
- RE: How can we tell - RGA 21:46:09 06/04/15 (5)
- RE: How can we tell - DrChaos 13:51:07 06/05/15 (0)
- RE: How can we tell - genungo 05:23:52 06/05/15 (3)
- RE: How can we tell - merid 09:18:47 06/07/15 (0)
- RE: How can we tell - Mr Peabody 09:22:27 06/06/15 (0)
- RE: How can we tell - RGA 08:30:24 06/05/15 (0)
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