It takes a lot of cone surface to move a lot of air needed for lower frequency sound. It also depends on the design of the speaker and crossover. Ported? Sealed? 2 way? 3 way? 4 way?
In general, a 3 way design will go lower in the bass region than a 2 way design. Of course there are exceptions to every rule. Many love the simplicity and coherence of a simple two way design though.
There is a lot more to speaker design than simply choosing how many drivers to use. The crossover design is very important, choosing frequencies and slopes, as is the design of the cabinet itself. Of course room and amplifier interaction with the speakers are critical too. There are many variables that go into developing great sound.
In general, a 3 way design will go lower in the bass region than a 2 way design. Of course there are exceptions to every rule. Many love the simplicity and coherence of a simple two way design though.
There is a lot more to speaker design than simply choosing how many drivers to use. The crossover design is very important, choosing frequencies and slopes, as is the design of the cabinet itself. Of course room and amplifier interaction with the speakers are critical too. There are many variables that go into developing great sound.