How long does it generally take to break in subs?
How you do this? What volume levels should be used and avoided?

When I bought my 12" Infinity they told me to keep the volume down low and the power turned all the way down on the amp. They didn't tell me for how long, so I did it for about 1 month. Sounds awesome and very clean -even running off a RF 200M amp (200 watt mono sub amp).
Good luck.

Martin

there should be a break in method in your manual, i went 2 weeks no more than 1/2 power on the amp, didnt hammer it... and now... holy crap.....

when i bought my infinitys they told me that i didnt have to wait. so since their in my girlfriends car she likes to have it loud. but they dont play as deep as they should im still working on why they dont. but i useally wait 2 weeks or so before hammering on them.

when i had mine they told me 20hours

i had no idea this had to be done! good thing i know now, my new Infinity Kappas are coming in at the end of the week.

Are you supposed to do this with 6x9'* too?

its usually only necessary w/ subwoofers

one of my infinity perfects broke in a little wierd and it sounded like it was blown for a while but after a while it decreased and sounds the same as the other one it is perfect now so some subs break in at different paces and if it sounds blown that is not always the case

EVERY speaker should be done like this. DO not use any speaker loudly for quite some time after you guy them.