Yes, there are.
Home theatres differ in the number of channels that they have. The stereo system that had the left and right speaker and a subwoofer is a 2.1-channel home theatre system.
The more common one that had 2 speakers beside the tv, one in the middle and two further away as well as a subwoofer is the 5.1 channel system. The first number in the system i.e 2 and 5, represents the number of speakers while the last digit .1 indicates the sub-woofers present.
There is also the soundbar which comes with the left and right channels attached to the center channel. It could be a portable BlueTooth device that allows you to enjoy your sound wherever you go. It also helps save up on space as you will have fewer speakers around the house.