I'm picky and impatient. I always replace in pairs. That way the break in time isn't as vital and lot changes from year to year won't affect things. If it's "bad", consider getting another woofer and sell your single.
Replacement Driver Burn-in Time???
I just replaced a woofer driver in a pair of Alon Model 1's (the pair is 8 years old). Does the replacement driver need time to break in? If so, how long does just one driver take to come into it's own?