I dont break subs in anymore. I used to, but now i just tune the amp with the volume cranked to a max listenign level. Then i tell customers listen no more than 3/4 up for a week or so, then free range. I guess thats sort of a break in, but not what most consider break in.
99 M6 t-top leather silver/pewter Z-28, 408ci, 471hp, 465tq
09 Diamond White Escalade
2013 Glacier White Audi S5