Yes, I use 2 RELs in a room that is narrower and longer. Used one originally. Two are not necessary to produce enough bass, but , as REL puts it, two load the room better. That is, although bass is non directional, generating it from both sides or the room gives a better pattern of sound dispersal. Also , each sub will be working less to produce a given sound level. Cross them over very low and you will not be aware of their presence until you turn them off. I turn mine off when working on my system and occasionally forget to power them back up. It takes a while before I realize that something is missing.