Probably stupid questions... so please be kind to someone just getting
into audio but wants the best!

I'm wondering what are the advantages/disadvantages/differences
between sealed and vented sub enclosures. When would you use one vs.
the other? Also, as far as sub placement goes, what direction should I
face one sub vs. two subs in the trunk of my '93 civic coupe? What
types of material make for a good box and what are their differences?
Any other information pertaining to this matter greatly appreciated.

Thanks!
-shawn