treeincYes. In fact, there is a subwoofer specifically designed to go with these speakers, the LSR310S. However, you will need to buy a crossover system that works with TRS or XLR outputs.
treeincIf you want to save some money on a sub, this one https://www.monoprice.com/product?p_id=605999 is supposed to be pretty similar to the LSR310S in quality. Same built in crossover and input support and a nicely recommended alternative on some audio sites. I have a Schiit Jotenheim desktop amp/dac with balanced pre-out connections so luckily I'm all set. Jotenheim pre-out XLR > sub > LSR30x is the way I plan to hook it up.