Is a Sub required for HT


I'm a 2-channel guy that decided to add a separate HT system. I currently have a center channel speaker and AV receiver running through my 2-channel preamp's HT bypass. I just purchased rear channel speakers. I hate subs for 2-channel, but are they required for HT?  
ricred1
I watched the Jungle Book last night and the SVS  PB- 2000 did exactly what I wanted. In a HT context it offers very, very good value.
I like a sub in my HT system for movie effects but I don't like a sub in my 2 channels system with full range speakers.
Subs aren't required for HT.  You will get better bass performance with one and movies, particularly one that involve a lot of explosions, will have more umph.
  If your front speakers are capable of going low enough-a rare but not impossible event-- then you won't miss that much