A soundbar is a single, long, rectangular device that is usually laid horizontally beneath the TV. The new slim form factor is a great advantage. It may or may not be paired with a subwoofer for better bass. A soundbar contains anywhere between two to seven speakers. A home theatre system, on the other hand, comes in a set and usually include a receiver, a subwoofer, and about five to seven speakers – one center speaker (front), two side speakers (front right and left), two side speakers (rear right and left), [one center speaker (back) and one top roof speaker]. The home theater system is highly configurable. That means you can start with a receiver, a subwoofer, and two speakers and later on add more speakers.