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General speaker questions for audio and home theater.

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Come to think of it I unknowingly DID do experiments in break in

Posted by airtime on June 22, 2017 at 07:32:35:
In the mid 90's I was obsessed with building NEW Dynaco A-25 speakers. Over an 5 year period I ordered about 5 sets of drivers. Seas 25F-EW 10" woofers, Morel MDT-20 tweeters and the famed Seas 25TDFC tweeters. Morel MDM-55 midranges and Peerless mids (forgot the numbers)
So again using my SPL meter I was trying to get a smooth crossover in and around the 1500Hz mark for the two way version and LEAP designs for the three way versions.
With usage the speakers range extended very slightly but mainly there was and increased in db at both extended ranges. I found this MAINLY on the woofer.
The tweeters - now here's the odd part - they would get very spiky in SPL reading very easily with little or no increase in their extension. Almost like a ringing effect.
But on a few smaller midranges I found both the sudden SPL spikes and increased db in their extended range.
This all smoothed out VERY quickly. Like in around an hour.