Thanks Vic,
Sorry but I could not understand what that Wikipedia article said. I majored in Electrical Engineering and have never heard of pink noise, neither could make any sense of how it can make my AE212 sound better.
Forgive my ignorance, but I also have never heard that cabinets needed to be broken in. How does that pink noise help in that, and how can you generate pink noise?
I just got a new AE212 and have played with it twice. Does it still make sense to "break it in"?
This topic always gets confusing. There is no need to formally 'break in' a speaker.... zero need. Period. HOWEVER, some drivers surrounds will get more elastic and loosen up a bit over the first few hours (or more) of playing. This depends quite a bit on the particular driver, and of course, if you get a cab new out of the box or one that has been played in a music store.
On some cabs (very few in my experience) you will notice a slight deepening of the low end, and as a result, a smoothing of the midrange given the increased ratio of low end to mids. This will typically happen during the first hour or so of playing.
The AE212 is one of those cabs that I (and others) have found to sound a little more open down low after the first hour or two of playing. However, you don't need to do anything special (pink noise or whatever) to achieve this. Just play the thing, and if you notice a touch more low end toward the end of your first gig... bonus
Put another way, even if there is a 'break-in' effect, there is no advantage to a formal break-in routine. An AE212 with a pink noise generator running through it for a day will sound identical to another AE212 that has been used on a couple of gigs.