Do you think driver “break in” is real?


Do you think “high end” drivers and crossovers typically need a “break in” period before they sound their best?  I ask because, I believe I’ve experienced this first hand in a very significant way. I replaced the tweeters (same exact brand and model as original) in my ACI Sapphire 25 year anniversary edition speakers and for the first week I thought I’d lost my all time favorite speakers. I was depressed!  So I just kept playing them…  finally after a couple weeks, I’m literally stunned and blown away at how incredible these speakers sound. Completely different than the first 30 or 40 hours after I put in the new Scan Speak tweeters. So I say break in period must be real - at least for some drivers. Has anyone else experienced this to a degree that is unmistakeable?  
Crossovers too?  I just rebuilt the crossovers for a pair of ACI Sapphire XL’s (using highest quality components- same values) and so far they sound mediocre. Hoping for the same result as my other Sapphires but after about 20 hours - no noticeable difference - and they do not even sound as good as prior to crossover rebuild. They sound flat, too bright with poor imaging - but for 10 to 15 years they were pretty great sounding speakers. Thoughts on crossover break in?? 
Thanks to anyone who responds!!  

sal1963

Showing 3 responses by larsman

@erik_squires - indeed, once broken in, a speaker should perform how it was designed to perform and no more playing will increase the performance.

I dunno about that 'very quickly' part, though - that's not been my experience with either speakers or headphones, but I guess it depends on how you define 'very quickly'. I give 'em 150 - 200 hours before I judge them, though some need less.

I don't think it's real. I know it's real. Sometimes 200 hours or more real. 

None of my speakers are 'poorly designed'; they were designed to require around 200 hours of break-in. Buy used speakers if you don't want to deal with things like that.