Okay, How Important Is Speaker Break In? (Dynaudio Contour 60i)


I have been running 25+ year old B&W Matrix 803 S2 speakers in my 2-channel system for about 15 years, and I finally treated myself to new speakers.  Mock me for buying based on research alone, but I got a really good deal and just unpacked my beautiful Dynaudio Contour 60i's.  The Dyn's are not broken in, just starting to play around with different songs, but I am expecting an improvement out of the box, and not getting it.  They are no more revealing, and slightly harder and more jangley in the mids and highs.  The bass is of course much better with the big Dyns, but the B&Ws with the Dyn Sub6 subwoofer I was running were better.  I have very good equipment so it is not a matter of driving bigger speakers (ARC Ref preamp and Bryston 7bSST2 monoblocks).  Unless speakers get A LOT better with break in, I thinking these Dyns may be converted back into cash.   Thoughts? Thanks.
mathiasmingus
Break in is important but only in the first few hours; if you don't like the speakers after a day or two, send it back. I purposely tried to gauge this when I bought Special 40s. Significant change in the first minutes, then slightly improvements to the 5th hour, then very little to the 15th hour (which btw is the break in time for BWs according to their manual), then next to nothing in the 50th, 100th, 200th playing hours. 
In your case though, it might be more of your preference of the BW house sound which makes the contour less impressive; haven't heard the matrix but the more modern BWs are slightly boosted up top and below, while the Dyns are dull flat. Do try to see if you can like the Dyn sound as they should be more detailed, albeit less exciting.
I had the Contour 20s for a short time. Strange animal. They were used and several hundred hours broke in according to the owner. Never quite got along with them. They sounded great ish sometimes with some music but overall not my cuppa tea. 

Had the Dyn Docua 140s years ago and everything sounded good on those although not spectacular
Thanks again for all the input.   I have some tinnitus in my ears, and it is triggered by harsh sounds or a poor recording, and is muted when listening to nice hifi audio.  The 60i's are maybe 8 or 10 hours into break in now and the tinnitus fires strong as soon as I enter the room.  They are definitely more harsh in the mids than the Bowers.  My wife noticed it too; when she first came into the room in which they were playing, she commented on distortion (she is not an audiophile, but noticed a degradation from the old speakers).  Unfortunately, the advice from this group seems pretty mixed - plenty of indication that I will see real improvement over time, plenty of indications that first reactions are probably not going to change that much.  Oh well, on with the journey...continue to break in, make a decision at some point.  

To gosta, the 803's are an mid 90's speaker...not sure what they cost new, one post said $3000.  I would expect $10K 2020 model from Dyn to be better, but that question is open.....

Thanks again - appreciate this community
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Given the general stagnation of speaker design (there are exceptions) you could only really expect the Dyns to be different, not necessarily better.  A high percentage of modern speaker designs incorporate a (somewhat) tilted up mid-high end, perhaps because modern taste favors the kind of "detail" that this can give the impression of, perhaps because it makes them more impressive in brief showroom demos (think: how big box stores adjust the settings on TVs on demo).  What you're hearing may ameliorate a little, but it won't go away, it's built in to the speaker.