I have a 15'' Eclipse Ti It has a little crack on the cone and is there a glue or something I could use to repair it also should it be in a bandpass sealed or ported box and what dimensions?
If it's truly a minor thing it can be repaired but if it's more serious and you wang on it pretty hard I'd suggest looking into getting it reconed instead.
As far as enclosure needs I've no experience with any of Eclipse's subs so I wouldn't have a clue.