Is a sub needed?

[chug]

If you are running full range front and center speakers and satellite rears in a small room?

 

[fuzz092888]

Only you can decide that. Do you feel like you are missing out on bass? When you watch movies do you want more of a visceral feel when something explodes, bangs, or stomps? If you're happy with how things sound, then no. If you think you want more, BOOM, then yea you could need a sub.

 

[Jeff R.]

YES

 

[j_garcia]

"Full range" would mean capable of adequate performance at 20Hz.

You don't NEED a sub, but it definitely helps. As fuzz said, if you don't mind the way it sounds without one, there's no reason you can't run it that way.

 

[gmichael]

Details please. What speakers, amps, room size, etc....

I run full range speakers, each with powered subs built in. I also have a sub with an 18" driver and a 4000 watt amp. I still wish I had more bass. Your call though.