Putting in subs

Hello all,

Im new to this audiophile stuff and was wondering how people in general put subwoofers into their systems given that most systems are only two channel.

Sorry, it isnt obvious to me.

A lot of us. Search old threads and you'll see.
There is a lot of good info if you do a search as Sugarbrie says. Once you do a little reading list you system, room size and some goals and you should get some real good suggestions.
Once you do all the reading, you'll need to invest a lot of time experimenting and tweaking.